Literatura académica sobre el tema "Load loss damage index"
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Artículos de revistas sobre el tema "Load loss damage index"
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Zhao, Yagebai y Liangquan Zhang. "Damage Quantification of Frame-Shear Wall Structure with Metal Rubber Dampers under Seismic Load". Revue des composites et des matériaux avancés 30, n.º 5-6 (30 de diciembre de 2020): 227–34. http://dx.doi.org/10.18280/rcma.305-605.
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The seismic load can bring serious damages to the coupling beams and frame beams in the frame-shear wall structure. Such damages can hardly be repaired, causing functional loss to the structure. One of the best ways to consume seismic energy input, rationalize the damage mode of structure, and prevent serious damages to the main components is to install metal rubber (MR) dampers materials in the frame-shear wall structure. Based on Park and Ang’s damage model, this paper presents pertinent formulas of damage indexes, and uses them to quantify the failure mode. Then, the correspondence was established between damage level of the target structure, reasonable damage mode, and damage index. Finally, two ABAQUS models of an 18-floor frame-shear wall structure were constructed: an uncontrolled structure (traditional frame-shear wall structure) and a controlled structure (frame-shear wall structure with MR dampers). Through comparative analysis, the characteristic parameters of the damper were determined for the reasonable damage mode, and the failure mechanism of the target structure was identified accurately under seismic load.
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Rodrigues, Rodolfo S., Gabriel Birck y Ignacio Iturrioz. "Damage Index Proposals Applied to Quasi-Fragile Materials Simulated Using the Lattice Discrete Element Method". Applied Mechanics and Materials 784 (agosto de 2015): 209–16. http://dx.doi.org/10.4028/www.scientific.net/amm.784.209.
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The process of damage in quasi-fragile materials is characterized by loss of isotropy for certain load levels, the strain localization, the cooperative effect between damaged regions and the avalanche of ruptures are particular features in the damage process of this kind of material. This behavior is not easy to represent with a continuous approach. In the present work a version of the Lattice Discrete Element Method (LDEM) is employed. This methodology allows the simulation of fracture and fragmentation in natural way. Different indexes will be shown to perform the measurement of the damage evolution in the context of LDEM. The performance of these indexes to evaluate the damage evolution is discussed in this paper.
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Dackermann, Ulrike, Jian Chun Li, Rajendra Rijal y Bijan Samali. "A Vibration-Based Approach for the Estimation of the Loss of Composite Action in Timber Composite Systems". Advanced Materials Research 778 (septiembre de 2013): 462–69. http://dx.doi.org/10.4028/www.scientific.net/amr.778.462.
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This paper presents a novel approach for the determination of the loss of composite action for timber composite systems using only measurements from non-destructive vibration testing. Traditionally, the composite action of a system is evaluated from static load testing using deflection measurements. However, static load testing is expensive, time consuming and inappropriate for existing flooring systems. The method proposed in this paper is based on the Damage Index (DI) method, which uses changes in modal strain energies, to detect locations and severities of damage. In the proposed method, a new Loss of Composite Action Index (LCAI), which is derived from direct mode shape measurements obtained from dynamic testing, is introduced to evaluate the loss of composite action. The proposed method is tested and validated on numerical and experimental models of a timber composite beam structure, which consists of two timber components that are connected with different numbers of screws to simulate various degrees of partial composite states. The results obtained from the new method are very encouraging and show a clear trend of the proposed dynamic-based LCAI in indicating the loss of composite action in the investigated timber composite structure.
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Kou, Suxia, Jianmin Zhang y Jing Ren. "Experimental Study on the Safety Assessment of Reinforced Concrete Shear Wall Structure with the Correspondence between Damage Image and Index". Advances in Civil Engineering 2021 (31 de mayo de 2021): 1–12. http://dx.doi.org/10.1155/2021/5514123.
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The post-disaster emergency rescue and loss evaluation hinges on the timeliness and accuracy of safety assessment of building structures in quake-hit regions. At present, the damage identification of quake-hit buildings in China is mainly conducted based on the experience of the experts. Such an assessment method will inevitably lead to the differences in identification results because each expert has his/her own subjective understanding of the degree of structural damage. In order to solve this problem, the low cyclic loading test of 7 specimens of shear wall is conducted and the hysteretic curves of seven shear walls are drawn. The failure modes and seismic performance of members under different design parameters (axial compression ratio of shear wall, shear span ratio, form of edge member, reinforcement ratio, stirrup ratio of coupling beam, and span height ratio) are compared. By recording the damage images taken at the controlled displacement under each level of load, the corresponding damage indexes are calculated, and the correspondence between the typical component damages and the damage indexes is discovered. After that, the images are compiled into an atlas. The authors calculate the damage index of the overall structure based on the damage indexes of the components and carries out damage identification of RC shear wall structure with the said damage index.
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Widiyatmoko, Bambang y Mefina Y. Rofianingrum. "Dynamic Characterization of Macrobending Loss Optical Fiber-Based Load Sensor". Journal of Technomaterials Physics 3, n.º 1 (26 de febrero de 2021): 74–82. http://dx.doi.org/10.32734/jotp.v3i1.5543.
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The weight of vehicles passing through the road greatly affects road damage, so it is necessary to have a non-stop weighing system or Weight in Motion (WIM). In this study, the dynamic characterization of the WIM sensor was carried out based on the principle of optical fiber macrobending. In this study, a single-mode step-index optical fiber was used as the sensor material and a laser diode with a power of 5 mW and a wavelength of 1,550 nm as a light source. Characterization was carried out by running over the sensor using a motor with three variations of speed, namely 10 km/hour, 15 km/hour, and 20 km/hour. Two different conditions were also carried out, namely, the sensor was directly crushed and the sensor was reinforced in the form of a half-cylinder wooden beam. The test was carried out with three different types of sensors. From the observations, data shows that the addition of a beam can increase the accuracy of the reading as seen from the smaller the difference in the output voltage reading for the same type of sensor and vehicle speed. Besides that, there is a strengthening of the sensor resistance up to 10 times which is known from the sensor output voltage where the voltage at the addition of the beam is 1/10 of the reading without the beam. This is due to an increase in the sensor area exposed to the load.
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Abouhussien, Ahmed A. y Assem AA Hassan. "Application of acoustic emission monitoring for assessment of bond performance of corroded reinforced concrete beams". Structural Health Monitoring 16, n.º 6 (30 de noviembre de 2016): 732–44. http://dx.doi.org/10.1177/1475921716681460.
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This article presents the results of an experimental investigation on the application of acoustic emission monitoring for the evaluation of bond behaviour of deteriorated reinforced concrete beams. Five reinforced concrete beam–anchorage specimens designed to undergo bond failure were exposed to corrosion at one of the anchorage zones by accelerated corrosion. Two additional beams without exposure to corrosion were included as reference specimens. The corroded beams were subjected to four variable periods of corrosion, leading to four levels of steel mass loss (5%, 10%, 20% and 30%). After these corrosion periods, all seven beams were tested to assess their bond performance using a four-point load setup. The beams were continuously monitored by attached acoustic emission sensors throughout the four-point load test until bond failure. The analysis of acquired acoustic emission signals from bond testing was performed to detect early stages of bond damage. Further analysis was executed on signal strength of acoustic emission signals, which used cumulative signal strength, historic index ( H( t)) and severity ( Sr) to characterize the bond degradation in all beams. This analysis allowed early identification of three stages of damage, namely, first crack, initial slip and anchorage cracking, before their visual observation, irrespective of corrosion level or sensor location. Higher corrosion levels yielded significant reduction in both bond strength and corresponding acoustic emission parameters. The results of acoustic emission parameters ( H( t) and Sr) enabled the development of a damage classification chart to identify different stages of bond deterioration.
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Divsholi, Bahador Sabet, Yao Wen Yang y Li Bing. "Monitoring Beam-Column Joint in Concrete Structures Using Piezo-Impedance Sensors". Advanced Materials Research 79-82 (agosto de 2009): 59–62. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.59.
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Despite that piezoelectric ceramic lead zirconate titanate (PZT) has been used for structural health monitoring (SHM) in various engineering systems, limited work has been conducted on real size concrete structures. Beam-column connections are critical regions in reinforced concrete (RC) moment-resisting frame structures. The vulnerability of RC beam-column joints has been identified from structural damage investigations over the past decades, especially in the area of earthquake engineering. In the context of a terrorist bomb attack, the beam-column joints are very vulnerable, especially when the perimeter columns lose their load carrying capacity due to damage and the beam-column joints become one of the crucial load transfer mechanism of the structural frame. To avoid catastrophic failures, it is important to monitor beam-column joints under existing gravitational loads. In this paper, an experiment is carried out on four real size concrete frame structures with different detailing subjected to gradually increased loads. A number of PZT sensors are bonded to the frame structure to acquire PZT electro-mechanical (EM) admittance signature. The structural mechanical impedance (SMI) is extracted from the PZT EM admittance signature and its sensitivity is compared with that of the EM admittance. The relations between the damage index and the loading step and tip deflection of the concrete structure are obtained. Finally the sensitivity of the PZT sensors in detection of the critical loading level is discussed. The results show that the PZT sensors are capable of monitoring the integrity and behavior of the real size concrete structures.
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Zhao, Hongduo, Mengyuan Zeng, Hui Chen, Jianming Ling y Difei Wu. "Investigating the Effect of Prestress Force on Cross-Tensioned Concrete Pavement Vibration". Transportation Research Record: Journal of the Transportation Research Board 2674, n.º 8 (22 de junio de 2020): 875–86. http://dx.doi.org/10.1177/0361198120925670.
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Prestress force loss is crucial to the structural performance of cross-tensioned concrete pavement (CTCP). Severe loss in prestress force will reduce the constricting-cracking capacity of the CTCP, resulting in damage with load and temperature applied. Vibration-based methods are commonly used in prestress force monitoring, but few relative studies are reported into CTCP and the relationship between prestress force and CTCP vibration is still unclear. The purpose of this paper is to investigate the effect of prestress force on CTCP vibration. The vibration characteristics of CTCP subjected to different prestress forces were studied through field testing and finite element (FE) analysis. Impulse load was applied as excitation at the anchorage zone and dynamic responses were measured in the time domain. A signal processing method was employed to obtain short-time power spectral from original vibration signals, which was utilized to extract vibration characteristics in time and frequency. As shown in both the field testing and the FE analysis, the prestress force has a more significant effect on frequency spectral distribution, rather than the dominant frequency. Integrated frequency is proved to be a reliable index for describing frequency spectral distribution and has a good correlation with prestress force, which suggests it can be used to reflect the change in prestress force. Overall, these findings indicate that vibration testing has potential in prestress force monitoring in CTCP, though the practicality of this method requires further demonstration.
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Yan, Kai, Yansong Hu, Kaozhong Zhao y Xin Lin. "Study on Safety Performance of Building Finish Layer under Thermomechanical Coupling Condition". Advances in Materials Science and Engineering 2021 (20 de septiembre de 2021): 1–16. http://dx.doi.org/10.1155/2021/3438613.
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The building finish layer is a comprehensive structural system including the building exterior insulation system and building exterior finish. Combining with buildings has the advantage of reducing wall heat loss and building deformation caused by large temperature differences. Since the building finish layer is prone to cracking, hollowing, and peeling, during the application process, its safety needs to be studied and certified. This study prepares 20 groups of specimens, 15 anchor bolts in each group. The anchor bolt pull-out strength test is carried out. Anchoring damage evolution law and failure mode of anchor bolts are investigated. And the influence of anchoring methods on the pull-out bearing capacity is analyzed. In addition, ABAQUS finite element data simulation is carried out. The stress state of finish in thermomechanical coupling condition and without the effect of temperature are compared and analyzed. The influence factors of anchor bolt pull-out strength and the influence of temperature load on the long-term performance of building finish layer are obtained. The durability of the building finish layer is analyzed. The results show that the anchoring strength of the anchor bolt is positively correlated with the anchoring depth. The anchoring strength is influenced significantly by anchoring construction sequence and temperature. The stress under the coupled effect of temperature and load is greater than that of the single effect of load, and the stress distribution changes significantly. Due to thermal expansion and contraction, the anchor bolt would loosen, which is more prone to damage the building finish layer in a low temperature environment. The weight relationship of each influencing factor of the building finish layer is proposed. A systematic evaluation index system is established. The results of this study provide a basis for subsequent related research work and engineering applications.
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Karunagaran, N. y P. Ramasamy. "Growth of Ethyl-Para-Hydroxybenzoate Single Crystal and its Characterization". Advanced Materials Research 584 (octubre de 2012): 121–25. http://dx.doi.org/10.4028/www.scientific.net/amr.584.121.
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Ethyl-para-hydroxybenzoate (EHB) single crystals have been grown by slow evaporation solution technique (SEST) using methanol as a solvent. The grown crystal was subjected to single crystal X-ray diffraction analysis, confirming that the crystal belongs to monoclinic structure. The grown crystal was characterized by powder X-ray diffraction analysis. The functional groups present in the EHB crystal have been identified using FTIR spectrum analysis. The laser damage threshold of EHB crystal was measured. The mechanical strength of the grown EHB crystal was measured using Vickers microhardness, no cracks have been observed up to 100 g of load. The optical transparency of the grown EHB crystal has been measured by UV-Vis-NIR spectrophotometer. The refractive index of grown EHB single crystal is 1.6610. The dielectric permittivity and dielectric loss of the EHB single crystal were studied as function of frequency and temperature. The thermogravimetric analysis (TG) and differential thermal analysis (DTA) were studied. The melting point of EHB was 123°C. The luminescence behavior of EHB single crystal has been analyzed by photoluminescence analysis.
Tesis sobre el tema "Load loss damage index"
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Baxter, Thomas. "The development and application of the load-stroke hysteresis technique for evaluating fatigue damage development in composite materials". Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-09052009-040716/.
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Price, Joanna McMillan. "The effect of four reduced-fat diets varying in glycaemic index, glycaemic load, carbohydrate and protein, on weight loss, body composition and cardiovascular disease risk factors". University of Sydney, 2006. http://hdl.handle.net/2123/1606.
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Doctor of Philosophy (PhD)Introduction: The conventional approach to weight loss, recommended by almost all health authorities around the world, has been to reduce the total amount of fat in the diet and replace with carbohydrates. However, research trials using this approach have produced only modest results at best, and despite the active promotion of low fat eating and an apparent decline in fat consumption, rates of overweight and obesity have continued to climb. More recently low glycaemic index (GI) and high protein diets have become popular and are widely used by the public. However, only a small number of randomised controlled trials have been conducted and none directly comparing the two. Both approaches effectively reduce glycaemic load (GL) and aim to reduce post-prandial glycaemia and insulinaemia. This study aimed to evaluate the ability of diets with reduced GL to enhance the weight loss effects of a reduced-fat diet, to compare the two approaches of reducing GL on metabolic and anthropometric changes, and to investigate any benefit of combining both approaches to produce the lowest GL. Methods: We conducted a 12-week intervention in 129 overweight or obese young adults who were assigned to one of four diets with varying GL, protein, carbohydrate and GI, but similar fat (30% energy), fat type and fibre content. DIET 1 (highest GL) contained 55% E as carbohydrate; DIET 2 was a low-GI version of DIET 1; DIET 3 was a high protein diet with 25% E as protein; DIET 4 (lowest GL) was a low-GI version of DIET 3. The increase in protein in DIETS 3 and 4 came primarily from lean red meat. All key foods and some pre-prepared frozen meals were provided to maximise dietary compliance. Outcome measures were body weight, body fat, lean mass, waist circumference and the following blood parameters: total cholesterol, LDL-cholesterol, HDL-cholesterol, triacylglycerols (TAG), free fatty acids, C-reactive protein, fasting insulin, fasting glucose and leptin. Insulin resistance and β-cell function were assessed using homeostatic model assessment (HOMA) and the newer computer models HOMA2-insulin sensitivity and HOMA2-β-cell function. Results: While all groups lost similar amounts of weight (4.2 to 6.2% of initial weight, p=0.09), the proportion who lost >5% of body weight varied significantly by diet: 31%, 56%, 66% and 33% in groups 1, 2, 3 and 4 respectively (p=0.011). Differences were strongest in women (76% of the total group) who showed significant differences among groups in percentage weight change (-3.7 ± 0.6%, -5.7 ± 0.6%, -6.5 ± 0.5%, -4.1 ± 0.7% respectively, p=0.005) and fat loss (-3.1 ± 0.4kg, -4.9 ± 0.6kg, -4.8 ± 0.4kg, -3.6 ± 0.7kg respectively, p=0.007). Total and LDL-cholesterol increased on DIET 3 (high protein) compared to a fall on diet 2 (high carbohydrate/low-GI, p=0.013). TAG, HDL-cholesterol and glucose homeostasis improved on all four diets, with no effect of diet composition. Goals for energy distribution were not achieved exactly: both carbohydrate groups ate less fat and the diet 2 group ate more fibre. Conclusions: Reducing GL, through either substituting low-GI foods or replacing some carbohydrate with protein, improved the efficacy of a reduced-fat diet in women and in those with high TAG. Combining both approaches to produce the lowest GL did not promote further weight or body fat loss. Although weight loss was similar in all four diets for the group as a whole, overall clinical outcomes were superior on the high carbohydrate, low-GI diet.
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Gonzáles, Laca Carlos Miguel y Faustor Carmen Jahaira Denise Villanueva. "Analysis of Article 159 of the Tax Code: An Appointment on the Denaturalization of the Counterclaim". Derecho & Sociedad, 2015. http://repositorio.pucp.edu.pe/index/handle/123456789/118818.
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In the first part of the article, a development for the concepts of provisional remedies and real or personal property bond and covering loss and damage, is proposed, under the Constitutional Court and our national doctrine view; as well as the scope of the first as a fundamental right, and second as a condition of execution. On the following part of the paper, the inclusion and the subsequent amendments to the article 159° of Tax Code is exposed, also its scopes and reasons. Finally, a possible modification of the article, that respect state´s raising goals and due process citizens’ right, is proposed.El presente artículo desarrolla los conceptos de medida cautelar y contracautela, a la luz de lo resuelto por el Tribunal Constitucional y lo establecido por nuestra doctrina, así como los alcances del primero como derecho fundamental y del segundo como requisito de ejecución. De la misma forma, se analiza los alcances de la incorporación del artículo 159° del Código Tributario, mediante Decreto Legislativo N° 1121, y su modificatoria a través de la Ley N° 30230. Finalmente, se propone una posible modificación al mencionado artículo, de conformidad con los fines recaudatorios del Estado y el derecho a la tutela jurisdiccional efectiva de los administrados.
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Filho, Josafá de Oliveira. "Estudo teórico-experimental da influência das cargas cíclicas na rigidez de vigas de concreto armado". Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-07112006-113514/.
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O objetivo principal do trabalho é analisar o comportamento experimental e teórico de vigas de concreto armado de modo a quantificar a perda de rigidez global através do cálculo de flechas sucessivas ocorridas durante a aplicação de carregamento cíclico, em regime de serviço. A ênfase da pesquisa é dada à análise numérica; a aderência na interface aço-concreto é tratada com uma estratégia onde cada parte é modelada isoladamente de modo a se considerar o contato entre a barra de aço (com o desenho de suas nervuras) e o concreto envolvente. A análise numérica foi feita com o auxílio do aplicativo ABAQUS, baseado no método dos elementos finitos. O modelo constitutivo usado para o concreto é fundamentado na mecânica do dano contínuo. Foram realizados ensaios experimentais com espécimes de concreto contendo uma barra de aço colocada em seu eixo e, também, com vigas de concreto armado sub-armadas e com armadura dupla, com seção transversal retangular e tipo T. Comparações dos resultados obtidos nos ensaios experimentais com as respostas da análise numérica são apresentadas e discutidas. Ao final, propõem-se expressões que quantificam a perda de rigidez em função do número de ciclos aplicado.The main purpose of this research is to analyze the experimental and theoretical behavior of reinforced concrete beams, in order to quantify the stiffness loss, by calculating successive deflections during the cyclic loads application, under service loads. The emphasis of this research is the numerical analysis. The modeling of steel-concrete interface is done taking into account the contact between the steel bars (with their ribs) and the concrete surrounding the bars. The numerical analysis was made by using the software ABAQUS, based on the finite element method. The concretes constitutive model is based on the continuous damage mechanics. The experimental tests were made with cylinder concrete specimens with an axial bar and rectangular and T cross section reinforced concrete beams, where some had only tension reinforcement and others had tension and compression reinforcement. Comparisons between experimental and numerical results are presented and discussed. At the end expressions to quantify the stiffness loss due to number of cycles are proposed.
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Bagchi, Arijit. "Modeling the Power Distribution Network of a Virtual City and Studying the Impact of Fire on the Electrical Infrastructure". Thesis, 2009. http://hdl.handle.net/1969.1/147910.
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The smooth and reliable operation of key infrastructure components like water distribution systems, electric power systems, and telecommunications is essential for a nation?s economic growth and overall security. Tragic events such as the Northridge earthquake and Hurricane Katrina have shown us how the occurrence of a disaster can cripple one or more such critical infrastructure components and cause widespread damage and destruction. Technological advancements made over the last few decades have resulted in these infrastructure components becoming highly complicated and inter-dependent on each other. The development of tools which can aid in understanding this complex interaction amongst the infrastructure components is thus of paramount importance for being able to manage critical resources and carry out post-emergency recovery missions.
The research work conducted as a part of this thesis aims at studying the effects of fire (a calamitous event) on the electrical distribution network of a city. The study has been carried out on a test bed comprising of a virtual city named Micropolis which was modeled using a Geographic Information System (GIS) based software package. This report describes the designing of a separate electrical test bed using Simulink, based on the GIS layout of the power distribution network of Micropolis. It also proposes a method of quantifying the damage caused by fire to the electrical network by means of a parameter called the Load Loss Damage Index (LLDI). Finally, it presents an innovative graph theoretic approach for determining how to route power across faulted sections of the electrical network using a given set of Normally Open switches. The power is routed along a path of minimum impedance.
The proposed methodologies are then tested by running numerous simulations on the Micropolis test bed, corresponding to different fire spread scenarios. The LLDI values generated from these simulation runs are then analyzed in order to determine the most damaging scenarios and to identify infrastructure components of the city which are most crucial in containing the damage caused by fire to the electrical network. The conclusions thereby drawn can give useful insights to emergency response personnel when they deal with real-life disasters.
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Lin, Hsin-Jung y 林欣蓉. "Verification of Thermo-induced Damage of Cementitious Material by Normalized Index of Ultrasonic Pulse Comparing with Carbonation and Loss of Ignition". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/4zkb93.
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碩士國立臺灣科技大學
營建工程系
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In tradition, to study the damage degree of concrete for tunnel lining structure surface subjected to heating, the ignition loss test (weight lost method) is often carried out with core sampling. This not only takes time but also induces second damage for the structure. This research developed a new non-destructive testing method to identify the thermal-induced damage degree of cementitious material fast using a normalized damage degree index, shear-pressure wave velocity ratio (Vs/Vp). In this study, the concrete with 420kgf/cm2 designed strength was used as the test material. The heating rate of 10 °C/min and the highest temperature ranged from 25 to 600 °C was used as the test variables to simulate the thermal-induced damage behavior. After the heat treatment, the traditional ignition loss test and 3, 7 and 14 days carbonization tests were conducted. In addition, the reliability and validity of ultrasonic pulse measurement was verified and then used to measure the shear-pressure wave velocity (volume change method) after the heat treatment and carbonization test. The test results show that the manual and instrument error of the ultrasonic pulse measurement is ±5 % under normal temperature test. The lower bond and upper bond Vs/Vp of 0.55 and 0.7 was found at normal temperature and maximum temperature of 600 °C test, respectively. The critical value of Vs/Vp occurred at 600 °C was observed. For the carbonization test results, the greater carbonization depth with larger Vs/Vp was found. When more cracks existing, the deeper carbonization depth was occurred. Moreover, the maximum temperature of thermal-induced damage estimated by the loss of ignition has a big difference from the actual maximum temperature. The accuracy of the maximum temperature examined by the Vs/Vp is higher than that obtained from ignition loss. This results implied that the volume changes are sensitive to weight loss for investigation of thermal-induced damage in concrete.
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"A Distribution-class Locational Marginal Price (DLMP) Index for Enhanced Distribution Systems". Master's thesis, 2013. http://hdl.handle.net/2286/R.I.18822.
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abstract: The smart grid initiative is the impetus behind changes that are expected to culminate into an enhanced distribution system with the communication and control infrastructure to support advanced distribution system applications and resources such as distributed generation, energy storage systems, and price responsive loads. This research proposes a distribution-class analog of the transmission LMP (DLMP) as an enabler of the advanced applications of the enhanced distribution system. The DLMP is envisioned as a control signal that can incentivize distribution system resources to behave optimally in a manner that benefits economic efficiency and system reliability and that can optimally couple the transmission and the distribution systems. The DLMP is calculated from a two-stage optimization problem; a transmission system OPF and a distribution system OPF. An iterative framework that ensures accurate representation of the distribution system's price sensitive resources for the transmission system problem and vice versa is developed and its convergence problem is discussed. As part of the DLMP calculation framework, a DCOPF formulation that endogenously captures the effect of real power losses is discussed. The formulation uses piecewise linear functions to approximate losses. This thesis explores, with theoretical proofs, the breakdown of the loss approximation technique when non-positive DLMPs/LMPs occur and discusses a mixed integer linear programming formulation that corrects the breakdown. The DLMP is numerically illustrated in traditional and enhanced distribution systems and its superiority to contemporary pricing mechanisms is demonstrated using price responsive loads. Results show that the impact of the inaccuracy of contemporary pricing schemes becomes significant as flexible resources increase. At high elasticity, aggregate load consumption deviated from the optimal consumption by up to about 45 percent when using a flat or time-of-use rate. Individual load consumption deviated by up to 25 percent when using a real-time price. The superiority of the DLMP is more pronounced when important distribution network conditions are not reflected by contemporary prices. The individual load consumption incentivized by the real-time price deviated by up to 90 percent from the optimal consumption in a congested distribution network. While the DLMP internalizes congestion management, the consumption incentivized by the real-time price caused overloads.Dissertation/Thesis
M.S. Electrical Engineering 2013
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Ghosh, Jayadipta. "Parameterized Seismic Reliability Assessment and Life-Cycle Analysis of Aging Highway Bridges". Thesis, 2013. http://hdl.handle.net/1911/71955.
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The highway bridge infrastructure system within the United States is rapidly deteriorating and a significant percentage of these bridges are approaching the end of their useful service life. Deterioration mechanisms affect the load resisting capacity of critical structural components and render aging highway bridges more vulnerable to earthquakes compared to pristine structures. While past literature has traditionally neglected the simultaneous consideration of seismic and aging threats to highway bridges, a joint fragility assessment framework is needed to evaluate the impact of deterioration mechanisms on bridge vulnerability during earthquakes. This research aims to offer an efficient methodology for accurate estimation of the seismic fragility of aging highway bridges. In addition to aging, which is a predominant threat that affects lifetime seismic reliability, other stressors such as repeated seismic events or simultaneous presence of truck traffic are also incorporated in the seismic fragility analysis.
The impact of deterioration mechanisms on bridge component responses are assessed for a range of exposure conditions following the nonlinear dynamic analysis of three-dimensional high-fidelity finite element aging bridge models. Subsequently, time-dependent fragility curves are developed at the bridge component and system level to assess the probability of structural damage given the earthquake intensity. In addition to highlighting the importance of accounting for deterioration mechanisms, these time-evolving fragility curves are used within an improved seismic loss estimation methodology to aid in efficient channeling of monetary resources for structural retrofit or seismic upgrade. Further, statistical learning methods are employed to derive flexible parameterized fragility models conditioned on earthquake hazard intensity, bridge design parameters, and deterioration affected structural parameters to provide significant improvements over traditional fragility models and aid in efficient estimation of aging bridge vulnerabilities. In order to facilitate bridge management decision making, a methodology is presented to demonstrate the applicability of the proposed multi-dimensional fragility models to estimate the in-situ aging bridge reliabilities with field-measurement data across a transportation network. Finally, this research proposes frameworks to offer guidance to risk analysts regarding the importance of accounting for supplementary threats stemming from multiple seismic shocks along the service life of the bridge structures and the presence of truck traffic atop the bridge deck during earthquake events.
Libros sobre el tema "Load loss damage index"
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Thompson, Rob. The glycemic load diet: Lose weight with this powerful new program. Emmaus, Pa: Rodale, 2011.
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Thompson, Antony Worrall. The GL diet made simple: Calculate your carbohydrate load for weight loss and healthy living. New York: Fall River Press, 2009.
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Dana, Carpender, ed. The glycemic load diet: Lose weight and reverse insulin resistance with this powerful new program. Emmaus, Pa: Rodale, 2011.
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The glycemic-load diet: A powerful new program for losing weight and reversing insulin resistance. New York: McGraw-Hill, 2006.
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Chakera, Aron, William G. Herrington y Christopher A. O’Callaghan. Disorders of plasma phosphate. Editado por Patrick Davey y David Sprigings. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199568741.003.0176.
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The commonest cause of sustained hyperphosphataemia is renal impairment, because the kidney normally excretes phosphate (note that phosphate levels normally rise following meals and that there is significant diurnal variation). A considerable phosphate load may also be provided by some medications, in particular, those used for bowel preparation. Hypophosphataemia may arise from reduced intake or absorption, increased renal excretion, or intracellular redistribution, particularly in response to carbohydrate loads with refeeding after starvation. Excessive renal phosphate loss can reflect tubular damage or inherited phosphate-wasting nephropathies. This chapter reviews the causes of derangements of phosphate metabolism and the clinical consequences.
Capítulos de libros sobre el tema "Load loss damage index"
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Veer, F., R. Nijsse y A. Riemslag. "Loss of strength due to damage close to load bearing holes in annealed and fully tempered glass". En Challenging Glass 4 & COST Action TU0905 Final Conference, 739–46. CRC Press, 2014. http://dx.doi.org/10.1201/b16499-102.
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Wang, Xulu y Limin Chang. "Estimation of Dynamic Response Index Domain of High Speed Railway Vehicle System". En Advances in Transdisciplinary Engineering. IOS Press, 2020. http://dx.doi.org/10.3233/atde200230.
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Based on the dynamic simulation model, the dynamic response index of vehicle system under the action of track irregularity is divided into three areas: repair, deterioration and maintenance. The correlation between the track irregularity index and the dynamic response index domain of vehicle system components is calculated and statistically studied. The estimation model of dynamic response index domain of vehicle system and the domain boundaries of different dynamic response indexes are established and obtained Line. According to the principle of single variable method, the excitation source of vehicle track system is divided into track irregularity and other comprehensive factors (such as temperature load, material damage, etc.), and a simple inversion method of track foundation state is proposed based on the estimation model of dynamic response index domain. Its basic principle is: if the statistical characteristics of track irregularity remain unchanged and other influencing factors change, the estimation domain and measurement domain of dynamic response index will produce grade jump, so as to determine whether the basic state of the line is normal. The simulation results show that the accuracy of domain estimation of dynamic response index of vehicle system is more than 80%, and the accuracy of recognition is more than 70% for the damage condition of the line infrastructure, where the fastener is empty.
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Ali, Abid, Nursyarizal Mohd Nor, Taib Ibrahim, Mohd Fakhizan Romlie y Kishore Bingi. "Big Data Storage for the Modeling of Historical Time Series Solar Irradiations". En Advances in Data Mining and Database Management, 433–63. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3142-5.ch016.
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This chapter proposes Big Data Analytics for the sizing and locating of solar photovoltaic farms to reduce the total energy loss in distribution networks. The Big Data Analytics, which uses the advance statistical and computational tools for the handling of large data sets, has been adopted for modeling the 15 years of solar weather data. Total Power Loss Index (TPLI) is formulated as the main objective function for the optimization problem and meanwhile bus voltage deviations and penetrations of the PV farms are calculated. To solve the optimization problem, this study adopts the Mixed Integer Optimization using Genetic Algorithm (MIOGA) technique. By considering different time varying voltage dependent load models, the proposed algorithm is applied on IEEE 33 bus and IEEE 69 bus test distribution networks and optimum results are acquired. From the results, it is revealed that compared to single PV farm, the integration of two PV farms reduced more energy loss and reduced the total size of PV farms. Big Data Analytics is found very effective for the storing, handling, processing and the visualizing of the weather Big Data.
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Shakya, Manjip, Humberto Varum, Romeu Vicente y Aníbal Costa. "Seismic Vulnerability Assessment of Slender Masonry Structures". En Handbook of Research on Seismic Assessment and Rehabilitation of Historic Structures, 313–30. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-8286-3.ch010.
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Existing slender masonry structures, such as Pagoda temples, towers, minarets and chimneys, exist all over the world and constitute a relevant part of the architectural and cultural heritage of humanity. Their protection against earthquakes is a topic of great concern among the earthquake engineering research community. This concern mainly arises from the strong damage or complete loss suffered by these types of structures when subjected to earthquake and also from the need and interest to preserve them. This chapter firstly presents a methodology for assessing the seismic vulnerability of slender masonry structures based on vulnerability index evaluation method. Secondly, presents the correlation between vulnerability index and Macroseismic method to estimate the physical damage in relationship with seismic intensity. Finally, presents implementation of the methodology to construct vulnerability curves, fragility curves and estimate losses.
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Emmett, Stevan R., Nicola Hill y Federico Dajas-Bailador. "Musculoskeletal medicine". En Clinical Pharmacology for Prescribing. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780199694938.003.0015.
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Osteoarthritis (OA) is best described as a chronic pain syndrome affecting one, or more frequently, multiple joints. It most commonly affects the knees, hips, hands, neck and lower back, although any joint can be affected. Defining OA by pathological changes is no longer considered best practice, as the correlation between pathology and symptoms is frequently discordant, i.e. patients with severe structural changes may present with minimum symptoms and vice versa. For this reason, patients should be assessed using a biopsychosocial model, which takes into consideration impact on social and psychological well- being, alongside pathological changes. OA can create substantial mobility problems and is the most common cause of disability in elderly people in the developed world. Prevalence rises with age such that approximately one- third of people in the UK over 45 have sought treatment for OA compared with 40– 50% of people over the age of 75. In the pathological conditions of OA, there are specific hallmarks of damage that affect load- bearing articular cartilage, the formation of new bone at the joint margins (osteophytosis), subchondral bone changes (sclerosis), thickening of the joint capsule, loss of cartilage, and joint space narrowing (Figure 7.1B). In general, structural changes seen on X- ray or CT do not correlate with the pain of OA, but an association does occur between the presence of synovitis, subchondral bone oedema and osteophytes. In OA the vasculature of the osteochondral junction also expresses higher levels of nerve growth factors (NGF) so pain sensitization associated with inflammation is likely to occur. OA is considered by some to be the result of physiological processes originally targeted at joint repair that, over time, cause tissue damage resulting in symptomatic OA. In many cases, severe trauma or pathological repair processes may be contributory factors. Other risk factors for OA include genetic and patient factors, such as age and obesity (see Box 7.1). Anti- NGF drugs may be of benefit, primarily via pain modulation, but OA is not considered to be a disease of inflammation and the mainstay of treatment relies on effective analgesia. The presence of synovitis in late disease is controversial and the presence of joint crystals may confound inflammation in OA. It is clear that wear, tear, and damage is associated with the breakdown of collagen and increased presence of proteolytic enzymes called matrix metalloproteinases (MMPs).
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Ali, Abid, Nursyarizal Mohd Nor, Taib Ibrahim, Mohd Fakhizan Romlie y Kishore Bingi. "Sizing and Placement of Battery-Sourced Solar Photovoltaic (B-SSPV) Plants in Distribution Networks". En Advances in Computer and Electrical Engineering, 220–51. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3531-7.ch011.
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This chapter proposes a mixed-integer optimization using genetic algorithm (MIOGA) for determining the optimum sizes and placements of battery-sourced solar photovoltaic (B-SSPV) plants to reduce the total energy losses in distribution networks. Total energy loss index (TELI) is formulated as the main objective function and meanwhile bus voltage deviations and PV penetrations of B-SSPV plants are calculated. To deal the stochastic behavior of solar irradiance, 15 years of weather data is modeled by using beta probability density function (Beta-PDF). The proposed algorithm is applied on IEEE 33 bus and IEEE 69 bus test distribution networks and optimum results are acquired for different time varying voltage dependent load models. From the results, it is known that, compared to PV only, the integration of B-SSPV plants in the distribution networks resulted in higher penetration levels in distribution networks. The proposed algorithm was very effective in terms of determining the sizes of the PV plant and the battery storage, and for the charging and discharging of the battery storage.
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Ali, Abid, Nursyarizal Mohd Nor, Taib Ibrahim, Mohd Fakhizan Romlie y Kishore Bingi. "Sizing and Placement of Battery-Sourced Solar Photovoltaic (B-SSPV) Plants in Distribution Networks". En Research Anthology on Clean Energy Management and Solutions, 1123–54. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-9152-9.ch048.
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This chapter proposes a mixed-integer optimization using genetic algorithm (MIOGA) for determining the optimum sizes and placements of battery-sourced solar photovoltaic (B-SSPV) plants to reduce the total energy losses in distribution networks. Total energy loss index (TELI) is formulated as the main objective function and meanwhile bus voltage deviations and PV penetrations of B-SSPV plants are calculated. To deal the stochastic behavior of solar irradiance, 15 years of weather data is modeled by using beta probability density function (Beta-PDF). The proposed algorithm is applied on IEEE 33 bus and IEEE 69 bus test distribution networks and optimum results are acquired for different time varying voltage dependent load models. From the results, it is known that, compared to PV only, the integration of B-SSPV plants in the distribution networks resulted in higher penetration levels in distribution networks. The proposed algorithm was very effective in terms of determining the sizes of the PV plant and the battery storage, and for the charging and discharging of the battery storage.
Actas de conferencias sobre el tema "Load loss damage index"
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Yoo, Byungseok, Darryll Pines y Ashish S. Purekar. "Guided Lamb Wave Interrogation of a Curved Composite Plate [0/90] Using the Hilbert-Huang Transform Approach". En ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2008. http://dx.doi.org/10.1115/smasis2008-591.
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This paper discusses a study of the Hilbert-Huang transform approach as a structural health monitoring tool for a curved composite panel with a [90/0/0/90]sym lay-up sequence. The Hilbert amplitude, phase, and frequency coupled with empirical mode decomposition (EMD) process are defined as the Hilbert-Huang transform (HHT) and used to evaluate structural damage in the curved composite panel as the level of damage increases. Piezoelectric (PZT) sheets are used as an actuator and receivers, akin to the pitch-catch method to excite the guided Lamb waves and to obtain the vibratory response of the curved composite panel. In this paper, a new damage metric using the Hilbert-Huang transformed energy and amplitude in conjunction with the Hilbert-Huang transformed phase are proposed and investigated as a new structural damage index. Results show that these damage metrics are capable of tracking progressive damage growth in the form of loss of torque load.
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Sawant, Shruti, Sauvik Banerjee y Siddharth Tallur. "Compressive sensing based data-loss recovery enables robust estimation of damage index in ultrasonic structural health monitoring". En 2020 IEEE SENSORS. IEEE, 2020. http://dx.doi.org/10.1109/sensors47125.2020.9278599.
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Mehrizi, Amir, Soheil Nakhodchi y Reza Adibi-Asl. "Limit Load Analysis of a Torispherical Head With Thermal Hot Spot Damage". En ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84990.
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Vessel dished heads are widely being used in storage tanks or pressure vessels. These heads are available in different shapes including hemispherical, ellipsoidal and torispherical heads. In this paper, pressure limit load of torispherical head with thermal hotspot damage is investigated. Thermal hotspots are one of the common types of in-service degradation in some pressurized components and can be considered as damage. This type of damage is usually caused by the loss of refractory lining on the inside wall of pressure components or due to a misdistribution of the flow within vessels containing catalysts. Hotspot damage potentially jeopardizes the integrity of the components [1]. In the current research, the impact of a thermal hotspot on the load carrying capacity of various shapes of torispherical heads is investigated using numerical simulation. Also, sensitivity analysis has been performed to investigate the effect of location of thermal hot spots and thickness in the torispherical heads, with and without thermal hot spot damage.
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Nakamura, Izumi, Akihito Otani y Masaki Shiratori. "Damage Observations of the Straight Pipes Subjected to Cyclic Load Amplitudes of Various Levels". En ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25495.
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Fatigue failure accompanied by ratchet deformation is well known as one of the failure modes of pressurized pipes under high-stress level cyclic load. In this research, the process of failure of such pipes was investigated based on the experimental result in which a straight pipe failed by increasing cyclic input of displacement amplitude step-by-step. The strain behavior, moment-deflection relationship, and observed damage were compared with the stress levels prescribed in the seismic design of the piping system in Japan. As a result, no significant damage was observed and the moment-deflection relationship remained almost linear within the primary stress limit of 3Sm, although the strains at some measurement points reached to the plastic region. In the experiment, damage was observed at the applied load level of approximately 5Sm of the primary stress level, and 0.15 and more of the fatigue damage index, i.e., the usage factor based on the design. The test results showed that there is several times as much margin as its designed stress limitation before failure occurs to actual piping systems.
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Bagnoli, K. E., Z. A. Cater-Cyker, R. L. Holloman, C. A. Hay, S. Chavoshi, K. M. Nikbin y L. T. Hill. "Volumetric Damage Modeling of High Temperature Hydrogen Attack in Steel Using a Continuum Damage Mechanics Approach". En ASME 2020 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/pvp2020-21279.
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Abstract Hydrogen attack is a degradation phenomenon that affects process equipment operated at elevated temperatures in an environment containing a high hydrogen partial pressure. It has been the subject of numerous studies over the years prompted by damage discovered during routine inspections, or incidents that have occurred in service. As non-destructive evaluation (NDE) techniques have improved, damage is being detected during earlier stages where safe operation may still be possible for some time period. This work focuses on the fitness for service evaluation of equipment containing high temperature hydrogen attack (HTHA) using a continuum damage mechanics (CDM) approach. The model can be employed to assess the loss in load bearing capacity due to damage in the form of widespread micro-fissuring and voids (i.e. up to the point of macro-crack coalescence). Experimental data from literature sources have been used to develop a relationship between damage rate and operational loading conditions. The predictions are compared to field experience to illustrate key aspects of this approach.
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Cavina, Nicolo`, Enrico Corti y Luca Solieri. "A Heat Flux Damages-Related Index". En ASME 2006 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ices2006-1425.
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Gasoline engines can be affected, under certain operating conditions, by excessive heat flux through the combustion chamber walls, which can result in serious engine damage. Specific power and efficiency are influenced by factors such as compression ratio and spark advance regulation, that modify the combustion development over the crank angle: the trade-off between performance and the risk of irreversible damages is still a key factor in the design of both high-performance (racing) and low-consumption engines. New generation detection systems, especially based on ionization current technology, allow aggressive advance mapping and control, and future equipment, such as low-cost in-cylinder pressure transducers, will allow following that trend. Also HCCI (Homogeneous Charge Compression Ignition) engines need a sophisticated combustion monitoring methodology, since increasing BMEP levels in HCCI mode force the combustion to approach large heat-flux operation. Many methodologies can be found in the literature to recognize potentially dangerous combustions, usually based on the analysis of accelerometer, in-cylinder pressure or ionization current signals. Signals are sampled with high sample rates, than filtered, for a clear recognition of the phenomenon. Filtered signals can then be used to define damage-related indexes, by means of various types of mathematical operations. The indexes are then compared to pre-defined thresholds, for the diagnosis of dangerous combustion events. Thresholds setting is a challenging task, since most indexes are usually not intrinsically related to the damages caused by abnormal combustion events. Furthermore, the indexes values usually strongly depend on the engine operating conditions (speed and load), and thresholds must therefore vary with respect to speed and load. This paper presents a novel approach to the problem, whose objective is to define a damage-related and operating conditions-independent index. The methodology is based on the in-cylinder pressure signal, that is used for the Rate Of Heat Release evaluation. An onset condition is defined, for the dangerous phenomenon identification, and the mean thermal power released during the over-heating part of the combustion is considered as a damage intensity index. The paper shows that this parameter does not depend on the engine operating conditions, and it reaches similar values for different types of engine, under critical conditions. The index, however, must also take into account the malfunction frequency, since permanent damages are not caused by isolated events. The use of a moving average filter on the raw index is aimed at obtaining a stable output, more representative of the permanent damage risk and less influenced by the single combustion. These considerations lead to the definition of a heat flux index, strictly related to the damages caused by abnormal combustions. The diagnostic threshold value is constant over the entire operating range. Once the index is defined, it can be implemented on a control unit for real time diagnosis, or it can be used as a reference for the off-line calibration of other indexes. Examples are shown of other indexes trends and threshold calibrations over the engine operating range.
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Adibi-Asl, R. y R. Seshadri. "Thermal Hot Spot Damage Assessment in Pressure Vessels". En ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63903.
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Local hot spots occur in some pressure vessels and piping systems used in power and process plants. This type of damage is typically caused by loss of refractory lining on the inside wall of pressure components or due to a maldistribution of the flow within vessels containing catalysts and reactive fluids. In general, this form of damage can be detected by thermography or temperature sensitive paints on the outside of the vessel. Hot spot damage can reduce the overall load carrying capacity of a pressurized component due to lower yield strength of the damaged region resulting from localized increase in temperature. This paper investigates hot spot damage assessment by reviewing the available solutions. Various pressure vessel profiles including cylindrical, spherical and conical vessels are discussed.
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Zhang, Jingzhou y Timothy Ovaert. "Simulation of Nano- and Micro-Indentation Behavior of Bone via a Plastic-Damage Model". En ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-192795.
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Damage results in a loss of material continuity, which distinguishes it from other types of material degradation. The loss of continuity can have an adverse effect on mechanical properties, and may be manifested in the form of cracks and/or voids. Bone tissue, as a composite material, contains voids and other non-homogeneities that are naturally occurring and distinct from damage. However, when subjected to mechanical loading, such as indentation, further damage accumulation may occur. Figure 1 shows a cross-section of a bovine cortical bone specimen after high-load conical indentation to a depth of 300 μm, resulting in a large permanently deformed region. Nanoindentation, using a Berkovich tip at 10 mN maximum load, was then performed at numerous locations within three defined damage “zones”. Zone 1 is adjacent to the bottom of the indent, defined at 25% of the maximum indent depth. Zones 2 and 3 extend further away, both scaled as a function of the indentation depth, d. Figure 2 shows the variation in Young’s modulus in the three damage zones, averaged over approximately 25 indents per zone. The data suggest that local changes in mechanical properties may occur as a result of compaction of voids or cracks. The purpose of this work, therefore, is to investigate the application of a plastic-damage model for simulation of bone nano- and micro-scale indentation behavior.
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Rachev, Alexander. "A Two Dimensional Phenomenological Model for Damage of Arteries". En ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-176442.
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Loss of mechanical strength of arteries can manifest itself in many ways including rupture of a vulnerable atherosclerotic plaques, burst of saccular aneurisms, rupture of artery/graft anastomosis, and traumatic rupture of aorta by impact loading due to automobile accidents. In all cases the fracture of the tissue leads to sudden cardiovascular events that often have a lethal end. To date there are insufficient experimental data on the mechanical strength of healthy and diseased vascular tissue. Most of the results refer to the failure properties from uniaxial quasi-static tensile tests on strips and rings. It was found that the tensile strength is different in the circumferential and longitudinal direction especially when it is determined from strain controlled dynamic tests [1]. Results form load-controlled fatigue tests have shown a gradual softening of the arterial tissue, development of a residual (plastic) deformation, and existence of S-N curve [2]. However, the information from uniaxial tests is not sufficient to predict the damage of tubular segments due to coupling between circumferential and longitudinal stress via constitutive equations and deformed geometry. Moreover, the mechanisms of arterial tissue failure remain unknown.
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Hisamatsu, Rikito, Sooyoul Kim y Shigeru Tabeta. "Estimation of Expected Loss by Storm Surges Along Tokyo Bay Coast". En ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-95336.
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Abstract In Japan, the fundamental disaster management plan was modified after a heavy rainfall event in 2015. According to the updated plan, the transfer of flood disaster risk to non-life insurance is promoted by the Japanese government. Thus, the importance of flood risk modeling for the insurance industry has increased. Winds are expected to become even stronger, resulting in higher storm surges, when the central pressure of the typhoon is intensified. Furthermore, it is possible for an insurance system to experience peak risk when such damage occurs simultaneously. Hence, refining the assessment method of storm surge risk is very important. An insurance company to which storm surge risk is transferred needs to assess not only the infrequent risks, for managing the risk of the company, but also the expected value of the estimated loss, for evaluating the insurance premium. However, only a few studies have assessed storm surges by stochastic approaches. In this study, storm surge losses along the coast of Tokyo Bay are predicted using the output of a stochastic typhoon model for 10,000 years. Storm surge losses due to 600 typhoons potentially causing storm surge damage for 10,000 years are calculated. Exceedance probability curves (EP curves) of estimated storm surge loss for each asset are created. Expected loss and the loss of representative return periods are evaluated based on these EP curves. We successfully determined the expected loss with a small calculation load.