Gotowe bibliografie tematyczne / Pier models

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Gotowa bibliografia na temat „Pier models”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Pier models"

Deng, Baodong, Yanmin Jia, and Dongwei Liang. "Study on the Seismic Performance of Prefabricated Single-Segment Steel Jacket Bridge Piers." Symmetry 13, no. 12 (2021): 2312. http://dx.doi.org/10.3390/sym13122312.

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To study the seismic performance of prefabricated single-segment steel jacket piers connected by grouting sleeves, two scaled symmetrical pier models with different anchorage lengths of the longitudinal reinforcement in the grouting sleeves and a comparative symmetrical cast-in-place (CIP) model were designed. OpenSees finite element models were established and shaking table tests were carried out on the three scaled pier models. The seismic response of each pier was compared and analyzed. Results showed the stiffness of the two prefabricated piers was greater than that of the CIP pier, and ot

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Reddy, Siva K., Sruthi T. Kalathil, and Venu Chandra. "Local Scour around Different-Shaped Bridge Piers." Civil Engineering Journal 10, no. 6 (2024): 2019–39. http://dx.doi.org/10.28991/cej-2024-010-06-019.

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Local scour around piers is the major cause of bridge failures, and its estimation is critical for safe design. The present study aims to identify a modified pier shape that can reduce local scour compared to a circular pier. In addition, M5 models are developed for maximum scour depth prediction and compared with the existing equations available in the literature. Thus, the effect of pier shape and alignment on local scour is experimentally investigated using three pier models with the same cross-sectional area placed in isolated and tandem arrangements under clear-water conditions. These are

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Al-Shukur, Abdul-Hassan K., and Manar Hussein Ali. "Optimum Design for Controlling the Scouring on Bridge Piers." Civil Engineering Journal 5, no. 9 (2019): 1904–16. http://dx.doi.org/10.28991/cej-2019-03091381.

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The scouring around bridge pier can be considered the most important reasons of bridge failure. Therefore, we investigated by using physical models of piers and we used single pier with square collar , circular collar and interaction of two piers in laboratory channel, its width 1 m and applied three velocities (0.1, 0.08, and 0.07) m/sec. This experimental investigation was made to choose the optimum shape and location of collar of single pier and comparing it with the interaction of two piers, the results showed that both square and circular collar decrease the scour depth, but the square co

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Ferregut, Carlos, and Miguel Picornell. "Reliability analysis of drilled piers in expansive soils." Canadian Geotechnical Journal 28, no. 6 (1991): 834–42. http://dx.doi.org/10.1139/t91-101.

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Heavy structures in areas with expansive soils are commonly founded on piers resting beneath the surface active zone. During construction, the piers remain essentially unloaded and are exposed to potentially high tensile stresses that can split the pier unless the pier has been adequately reinforced. In this context, uncertainties arise relative to (i) the parameters governing the load transfer from the soil to the pier, (ii) the potential heave to be expected in a "free field" condition, when the soil movements are not restricted by the pier, and (iii) the estimation of the pier capacity to r

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Chen, Libo, Yi Tu, and Leqia He. "A Probabilistic Capacity Model and Seismic Vulnerability Analysis of Wall Pier Bridges." Applied Sciences 10, no. 3 (2020): 926. http://dx.doi.org/10.3390/app10030926.

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This study aims to establish a probabilistic capacity model of a wall pier under various damage states, and the seismic vulnerability of a typical wall pier bridge is studied. The finite element analysis of the wall pier is carried out by using the layered shell element, and its accuracy is verified through the comparison with the experimental results. A series of wall pier samples are generated based on the survey data, and the corresponding finite element models are established. The hysteresis analysis is implemented to obtain the displacement drift ratio of each seismic performance point. A

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Sha, Yanyan, and Hong Hao. "Laboratory Tests and Numerical Simulations of CFRP Strengthened RC Pier Subjected to Barge Impact Load." International Journal of Structural Stability and Dynamics 15, no. 02 (2015): 1450037. http://dx.doi.org/10.1142/s0219455414500370.

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Bridge piers are designed to withstand not only axial loads of superstructures and passing vehicles but also out-of-plane loads such as earthquake excitations and vessel impact loads. Vessel impact on bridge piers can lead to substantial damages or even collapse of bridge structures. An increasing number of vessel collision accidents have been reported in the past decade. A lot of researches have been conducted for predicting barge impact loads and calculating structural responses. However, in practice it is not possible to design bridge structures to resist all levels of barge impact loads. M

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Ebtehaj, Isa, Ahmed M. A. Sattar, Hossein Bonakdari, and Amir Hossein Zaji. "Prediction of scour depth around bridge piers using self-adaptive extreme learning machine." Journal of Hydroinformatics 19, no. 2 (2016): 207–24. http://dx.doi.org/10.2166/hydro.2016.025.

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Accurate prediction of pier scour can lead to economic design of bridge piers and prevent catastrophic incidents. This paper presents the application of self-adaptive evolutionary extreme learning machine (SAELM) to develop a new model for the prediction of local scour around bridge piers using 476 field pier scour measurements with four shapes of piers: sharp, round, cylindrical, and square. The model network parameters are optimized using the differential evolution algorithm. The best SAELM model calculates the scour depth as a function of pier dimensions and the sediment mean diameter. The

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Zhu, Mei-Liang, Li-Qing Zhang, Ye Ma, and Shun-Kun Jiang. "Stability Analysis of High-Pile and high-pier Considering Initial Pier Deviation." E3S Web of Conferences 261 (2021): 02050. http://dx.doi.org/10.1051/e3sconf/202126102050.

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Based on the high-pile and high-pier bridge of Qianhuang Expressway, eigenvalue buckling analysis is carried out by establishing three-dimensional finite element models of three different bridge types and high-pier types, and the corresponding structural nonlinear buckling loads under different initial pier deviations are calculated. The calculation results show that the nonlinear buckling loads of three high-pier types are less than elastic buckling loads. The stability of column high-pile and high-pier of continuous bridge is better than that of simple supported bridge, and the stability of

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Maimun, R., Abdullah, Nizarli, and Safwan. "Experimental study on Local Scour around Bridge Pier Models generated by Flash Floods carrying Debris." IOP Conference Series: Earth and Environmental Science 1343, no. 1 (2024): 012028. http://dx.doi.org/10.1088/1755-1315/1343/1/012028.

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Abstract The analysis of local scouring around bridge piers currently is based on typical river flood discharges. However, extreme events like flash floods with high velocity and discharge, carry wooden debris that accumulates upstream of the bridge pier. This results in additional forces due to flow diversion and reduction in flow area, so impacting hydraulic structures and exacerbating the scouring process. The study objective was to examine the impact of debris transported by flash floods on the depth and distribution patterns of scouring around bridge piers. This research was conducted in

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Bestawy, A., T. Eltahawy, A. Alsaluli, A. Almaliki, and M. Alqurashi. "Reduction of local scour around a bridge pier by using different shapes of pier slots and collars." Water Supply 20, no. 3 (2020): 1006–15. http://dx.doi.org/10.2166/ws.2020.022.

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Abstract Local scour around bridge piers is one of the main causes of bridge failure all over the world. Experimental and hydraulic models were carried out to investigate two types of scour reduction methods around a single cylindrical pier, namely the pier's slots and collars. The efficiency of various types of pier slots and circular collars around the pier's base in reducing scour were studied. A new shape of a conical collar was developed by the authors and examined along with other shapes. The results revealed that collars, in general, have more influence in reducing scour depth than slot

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Rozprawy doktorskie na temat "Pier models"

Issa, Camille Amine. "Nonlinear earthquake analysis of wall pier bridges." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/54297.

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Accurately predicting the response of complex bridge structures to strong earthquake ground motion requires the use of sophisticated nonlinear dynamic analysis computer programs not generally available to the bridge design engineer. The analytical tools that have been developed are generally applicable to bridges whose substructures can be idealized as beam-columns. Bridges with wall piers do not belong to this category The major objective of this study is to develop an analysis tool capable of simulating the effects of earthquakes on monolithic concrete wall pier bridges. Thus, after surveyi

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Li, Dongcheng. "Los Angeles-Long Beach Harbor Pier 400 Harbor Resonance Study Using Numerical Model, CGWAVE." Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/LiD2002.pdf.

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D'Aguanno, Erica [Verfasser], Alfred [Akademischer Betreuer] Fahr, Gerrit L. [Akademischer Betreuer] Scherphof, and Pier Luigi [Akademischer Betreuer] Luisi. "Experimental studies on the spontaneous entrapment of macromolecules inside liposomes : synthetic models of minimal cells / Erica D'Aguanno. Gutachter: Alfred Fahr ; Gerrit L. Scherphof ; Pier Luigi Luisi." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2016. http://d-nb.info/1081366850/34.

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Varun. "A Simplified Model for Lateral Response of Caisson Foundations." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14016.

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Caisson or pier foundations are encountered as part of the foundation system of tall structures such as bridges, transmission towers, heliostats, etc, and correspond to rigid blocks of length-to-diameter (D/B) ratio on the order of D/B = 2-6. As a result of their geometry and stiffness characteristics, the mechanisms of load transfer from the superstructure to the surrounding soil and their kinematic response to seismic wave propagation are governed by a complex stress distribution at the pier-soil interface, which cannot be adequately represented by means of simplified Winkler models for shal

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Li, Junhong Li. "Pier Streamlining as a Bridge Local Scour Countermeasure and the Underlying Scour Mechanism." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1518565785864439.

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Hong, SeungHo. "Interaction of Bridge Contraction Scour and Pier Scour in a Laboratory River Model." Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7533.

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The engineering design of a hydraulic structure such as a river bridge requires consideration of the factors that affect the safety of the structure. Among them, one of the most important variables is bridge foundation scour. However, engineering experience seems to indicate that computation of scour depth using current scour formulas tends to overpredict scour in comparison to field measurements. The result can be an overdesigned bridge foundation that increases the cost of the bridge. One possible reason for the overprediction is the current practice of adding separate estimates of contract

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Bolduc, Laura Christine. "Probabilistic models and reliability analysis of scour depth around bridge piers." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1764.

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Wills, Andrew Johan. "Abacus-Tournament Models of Hall-Littlewood Polynomials." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/64427.

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In this dissertation, we introduce combinatorial interpretations for three types of HallLittlewood polynomials (denoted Rλ, Pλ, and Qλ) by using weighted combinatorial objects called abacus-tournaments. We then apply these models to give combinatorial proofs of properties of Hall-Littlewood polynomials. For example, we show why various specializations of Hall-Littlewood polynomials produce the Schur symmetric polynomials, the elementary symmetric polynomials, or the t-analogue of factorials. With the abacus-tournament model, we give a bijective proof of a Pieri rule for Hall-Littlewood polynom

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Saade, Angela Charbel. "Numerical Analysis of RAP Elements under Dynamic Loading." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/99375.

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The 2010-2011 Canterbury, New Zealand, Earthquake Sequence (CES) resulted in 185 fatalities and approximately $NZ40 billion in damage, much of which was due to liquefaction and related phenomena. As a result, an extensive soil improvement field testing program was initiated and Rammed Aggregate Piers� (RAP) were shown to be a feasible method to mitigate the risk from liquefaction during future events. To better design and more fully assess the efficacy of reinforcement techniques against liquefaction, pre- and post-treatment in-situ test data are compiled, to include results from cone penetrat

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Biague, Mário Fernandes. "Modelagem da carteira dos recursos energéticos no PIR: validação do modelo no PIR de Araçatuba." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-20082010-161027/.

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O objetivo desta tese é construir um modelo de composição de carteiras de recursos energéticos dentro do Planejamento Integrado de Recursos Energéticos (PIR), aplicável em uma determinada região ou país. Este modelo inclui as etapas de definição do espaço geográfico de estudo, o mapeamento de recursos, a caracterização dos recursos energéticos existentes e sua valoração. Após estas etapas, é feita a composição de carteiras energéticas, seguida pela construção de cenários e análise de riscos e incertezas para a definição da carteira preferencial dos recursos energéticos da região. Como ferramen

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Książki na temat "Pier models"

Linden, Paul, Stephen Buckley, and Diogo Bolster. Simplified models for particulate dispersion in buildings: PIER final project report. California Energy Commission, 2008.

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Seabergh, William C. Los Angeles Harbor Pier 400 Harbor Resonance Model Study. U.S. Army Engineer Waterways Experiment Station, 1995.

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N, Horne Roland, California Energy Commission. Public Interest Energy Research., and Stanford University. Dept. of Energy Resources Engineering., eds. Physical modeling of CO₂ sequestration: PIER final project report. California Energy Commission, 2008.

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R, Holnbeck Stephen, Montana. Dept. of Transportation, and Geological Survey (U.S.), eds. Evaluation of pier-scour equations for coarse-bed streams. U.S. Geological Survey, 2004.

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R, Holnbeck Stephen, Montana. Dept. of Transportation, and Geological Survey (U.S.), eds. Evaluation of pier-scour equations for coarse-bed streams. U.S. Geological Survey, 2004.

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Masanet, Eric. Assessment of household carbon footprint reduction potentials: PIER final project report. California Energy Commission, 2009.

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Chase, Katherine J. Evaluation of pier-scour equations for coarse-bed streams. U.S. Dept. of the Interior, U.S. Geological Survey, 2004.

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Chase, Katherine J. Evaluation of pier-scour equations for coarse-bed streams. U.S. Geological Survey, 2004.

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Chase, Katherine J. Evaluation of pier-scour equations for coarse-bed streams. U.S. Dept. of the Interior, U.S. Geological Survey, 2004.

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Chase, Katherine J. Evaluation of pier-scour equations for coarse-bed streams. U.S. Dept. of the Interior, U.S. Geological Survey, 2004.

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Części książek na temat "Pier models"

Liang, Gangyi, Zunwen Liu, Xingjing Li, and Hong Song. "Study on Seismic Response Mechanism of Continuous Rigid Frame Composite Girder Bridge of High-Speed Rail." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-5814-2_17.

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AbstractIn order to explore the earthquake response mechanism of continuous rigid frame composite girder bridge of high-speed railway, based on a rigid frame bridge of high-speed railway in northwest China and combined with the characteristics of CRTS type I double block non-ballast track structure, three continuous rigid frame composite girder bridge models were established, which considered the constraints of track and subsequent structure, only considering the constraints of track and no considering the constraints of track. The seismic response of structural systems is studied by using res

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Lei, Fan, and Yingjiang Zhao. "Dynamic Characteristics Test and Seismic Response Research of Deep-Water Pier Models." In Sustainable Civil Infrastructures. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-90717-3_23.

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Shang, Qianqian, Hui Xu, and Jian Zhang. "Study on Prediction Method for Compression Scour Depth of River-Crossing Bridge." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_20.

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AbstractRiverbed deformation caused by river-crossing bridge construction can be divided into compression scour and local scour. Compared with local scour, fewer studies have been made on the compression scour caused by bridge piers. It is noteworthy that, the compression scour can lead to riverbed scour of the whole cross section along a bridge site, which is obviously detrimental to the bridge foundation safety. Based on a summary of existing research findings, a prediction model for the compression scour of bridge piers is constructed, and the model is applied in predicting the compression

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Fallavollita, Federico. "Four Projects of Pier Luigi Nervi. A Methodology for the Construction and 3D Print of Architectural Models." In Advances in Intelligent Systems and Computing. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20216-3_20.

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Tan, Zhirong, Gang Xing, Xing Gao, and Xin Cui. "Turbulent Flow Simulation of Bridge Piers and Navigation Safety of Ships in Curved River Sections with Variable Water Level." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_64.

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AbstractSome of the bridges across the Yangtze River in the Three Gorges Reservoir area are in the curved section, and the collision prevention of bridges is a hot issue in the current industry. The system of ships sailing across bridges is a complex system in the discipline of transportation engineering. It is affected by ship conditions, channel conditions, meteorology and hydrology, navigation management and human factors. In order to grasp the influence of turbulent flow near the piers of bridges in curved river sections and oblique flow during variable water level periods on ships crossin

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Leslie Johnson, Donald, and Donald Langmead. "Pier Luigi nervi." In Makers of 20th-Century Modern Architecture. Routledge, 2013. http://dx.doi.org/10.4324/9780203059210-76.

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Zhang, Xudong, Xiushen Xia, and Heng Zhang. "Study on the Damage Evolution Law of Railway High Pier of New Replaceable Components Under Near-Fault Ground Motion." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4090-1_42.

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AbstractIn order to improve the energy dissipation effect of the connection components of steel truss joints and optimize the arrangement of the components, a new replaceable component railway pier structure was proposed, referring to the transmission tower structure. The new pier consists of four pier columns and the steel truss connection system between the columns. Based on the OpenSees platform, a dynamic analysis model of the new railway pier was established. 56 seismic records were input, and incremental dynamic analysis (IDA) was carried out to investigate the damage evolution law of th

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Baranwal, A., B. S. Das, and A. Choudhary. "Bridge Pier Scour Depth Prediction Model—A Review." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-9151-6_7.

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Garrione, Maurizio, and Filippo Gazzola. "The Physical Models." In Nonlinear Equations for Beams and Degenerate Plates with Piers. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30218-4_1.

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Kunz, Claus, and Jan Schülke. "Ship Impact for Suederelbe Bridge Crossing in Hamburg." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_55.

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AbstractIn the harbour of Hamburg a new bridge crossing the Suederelbe at Elbe km 620 has been planned. The bridge is part of the BAB26 motorway. Contracted by DEGES, a German company for highway planning and design, BAW determined the ship impact loads on the basis and methodology of EN 1991-1-7 (2006) on a site - specific basis, BAW (2016). The Suederelbe Bridge crossing will have a length of 695,60 m with main span bridging the fairway over 350 m. The pylon height of the main piers is planned to be 150 m. The clearance height of the Suederelbe crossing should be 53 m above sea level. The tw

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Streszczenia konferencji na temat "Pier models"

Ma, Ran, Chul-Woo Kim, and Daigo Kawabe. "Point cloud-based geometry updating and finite element analysis of railway bridge pier." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.0972.

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This study presents a novel approach to updating the geometry of railway bridge piers using 3D reconstruction techniques integrated with finite element analysis (FEA). Combining photogrammetry and laser scanning, the proposed method generates high-fidelity digital models that accurately reflect the structural and geometric characteristics of bridge piers. A case study involving a railway bridge pier demonstrates the method’s effectiveness, achieving centimeter-level accuracy in dimension evaluation compared to design documents. Additionally, the updated finite element model successful

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Zhang, Jiading, Yuqing Liu, Qiang Zhou, Ting Liu, and Fengping Wang. "Experimental study on Composite Connections Piers with different rebar connection." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.3027.

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This paper proposes a novel composite connection (CC) for bridge pier–pile cap joint. To investigate the failure modes and hysteretic behaviour of precast piers with CC, pseudostatic tests of two half- scale specimens have been conducted, with the rebar connected by bolt and threaded holes, respectively. The result show that the failure mode of precast piers with CC is consistent with that of cast-in-place (CIP) piers. The hysteretic curves of the precast piers have a large shape with a slight pinching. The displacement ductility coefficients ranging from 3.33 to 3.35, which are close

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Gunawan, Devin, Naoki Sogabe, Fumiaki Nagashima, and Yuichi Yoshimura. "Damage Evaluation of UHPFRC Repaired RC Piers Using Optical Fiber." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.2520.

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Improvement of seismic performance and maintenance of structural health are essential to ensure the resilience of structures in earthquake prone areas. Previous studies have developed a method to retrofit RC bridge piers by replacing the cover concrete with UHPFRC in the plastic hinge region. In this study, the authors investigated its application for repairing damaged RC piers. The authors also developed a damage evaluation method for the repaired or retrofitted piers based on the strain of the UHPFRC cover measured using optical fiber sensors. A cyclic loading test was conducted on

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Kajita, Yukihide, Ryo Morishige, Jeong Moon Kyeong, and Taiji Mazda. "Displacement Prediction by Acceleration of Bridge Pier Using Long Short-Term Memory." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.2360.

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After a large earthquake, prompt assessment of damage to seismic isolation bearings, especially in bridges, is critical. Although accelerometers are commonly used in structural health monitoring, displacement response calculations based on time integration of acceleration data are often inaccurate due to numerical errors. In this paper, using dynamic analysis results on a bridge model with seismic isolation bearings, a long short-term memory (LSTM) model was employed to predict displacement more accurately. Results showed that the LSTM model reduced the maximum response displacement e

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Cohen, Benjamin G., Burcu Beykal, and George M. Bollas. "Selection of Fitness Criteria for Learning Interpretable PDE Solutions via Symbolic Regression." In The 35th European Symposium on Computer Aided Process Engineering. PSE Press, 2025. https://doi.org/10.69997/sct.199083.

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Physics-Informed Symbolic Regression (PISR) offers a pathway to discover human-interpretable solutions to partial differential equations (PDEs). This work investigates three fitness metrics within a PISR framework: PDE fitness, Bayesian Information Criterion (BIC), and a fitness metric proportional to the probability of a model given the data. Through experiments with Laplace�s equation, Burgers� equation, and a nonlinear wave equation, we demonstrate that incorporating information theoretic criteria like BIC can yield higher fidelity models while maintaining interpretability. Our results show

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Chong, Shen, Su Qingtian, Wu Chong, and Li Jinguo. "Numerical and Experimental Study on the Static Performance of Composite T-shaped Piers with Steel Bent Cap and Concrete Column." In IABSE Congress, San José 2024: Beyond Structural Engineering in a Changing World. International Association for Bridge and Structural Engineering (IABSE), 2024. https://doi.org/10.2749/sanjose.2024.0763.

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In order to solve the problems of heavy self-weight and construction difficulties of the cap beam, a new kine of composite T-shaped pier with steel bent cap and concrete column is proposed in this paper, and its connection joint consists of flange and rebars. Finite element analysis and scaled model test are used to study the ultimate bearing capacity and failure mode of the pier. In the test, there was a significant vertical displacement at the end of the right cantilever beam, and local buckling caused by principle stress occurred at the top of webs between transversal partitions an

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Lu, Wen-li, Qing-Tian Su, and Wie Xie. "Experiment study on mechanical behavior of composite beam with fixed pier-girder system." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.0405.

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This study proposes a π-type composite beam bridge with a fixed pier-girder system. This structural configuration integrates the superstructure with the substructure while incorporating a UHPC layer to mitigate concrete cracking. To evaluate its mechanical behavior, a scaled model static load test was conducted. The study analyzed strain distribution, deformation characteristics, and crack propagation patterns, providing insights into the failure mechanisms and load-bearing capacity of the structure. The results indicate that the negative bending region at the mid-pier is the most vul

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Yamaguchi, Takahiro. "Damage Identification of a Reinforced Concrete Bridge Pier after an Earthquake based on a Physics-informed Neural Network." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.1902.

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This study addresses the condition assessment of a reinforced concrete (RC) bridge pier after an earthquake based on seismic responses. This study proposes a physics-informed neural network (PINN) for solving a nonlinear multi-degree-of-freedom (MDOF) structural identification problem to localize and quantify damages. This study adopts a stacked bilinear rotational spring model. Governing equations, Newmark-β method, and hysteresis information are incorporated into a loss function of a deep-layered neural network. The method was validated using real seismic responses, which were obtai

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Rathnayake, Hasindu Malshan, Ashvinie Thembiliyagoda, and Kasun De Silva. "Validating Numerical Model for Bridge Pier Scour Estimation Through Physical Modelling - Case Study of Kelanisiri Bridge." In 2024 Moratuwa Engineering Research Conference (MERCon). IEEE, 2024. http://dx.doi.org/10.1109/mercon63886.2024.10688772.

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Duan, Shaoqing, and Lei Kuang. "Hierarchical Cascading Technique for Single Periodic SAW Models." In 2024 Photonics & Electromagnetics Research Symposium (PIERS). IEEE, 2024. http://dx.doi.org/10.1109/piers62282.2024.10617891.

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Raporty organizacyjne na temat "Pier models"

Ko, Yu-Fu, and Jessica Gonzalez. Effects of Low-Cycle Fatigue Fracture of Longitudinal Reinforcing Steel Bars on the Seismic Performance of Reinforced Concrete Bridge Piers. Mineta Transportation Institute, 2024. http://dx.doi.org/10.31979/mti.2024.2328.

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Earthquakes, which can cause tremendous local stress and strain on infrastructure, can cause reinforced concrete (RC) bridges to collapse due to the concrete cracking and fracture of the steel reinforcement rebars. The fracture of longitudinal reinforcing steel due to low-cycle fatigue is one of the main causes of failure in RC structures under earthquake loading. The purpose of this research is to include the effects of low-cycle fatigue fracture of longitudinal reinforcing steel bars on the seismic performance of reinforced concrete bridge piers. To obtain a greater understanding of low-cycl

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Ko, Yu-Fu, and Jessica Gonzalez. Fiber-Based Seismic Damage and Collapse Assessment of Reinforced Concrete Single-Column Pier-Supported Bridges Using Damage Indices. Mineta Transportation Institute, 2023. http://dx.doi.org/10.31979/mti.2023.2241.

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Near-fault earthquakes can have major effects on transportation systems due to the structural damage they impose on bridges. Therefore, it is imperative to assess the seismic damage of bridges appropriately, and this research focuses on reinforced concrete (RC) bridges. This research advances the seismic performance assessment of RC single-column pier-supported bridges with flexural failure under near-fault ground motion by use of ductility coefficients and damage indices. The methodology included modeling fiber-based nonlinear beam-column elements to simulate the damage development process of

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Seabergh, William C., and Leonette J. Thomas. Los Angeles Harbor Pier 400 Harbor Resonance Model Study. Defense Technical Information Center, 1995. http://dx.doi.org/10.21236/ada298873.

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Sharp, Jeremy, Tate McAlpin, Gary Bell, Howard Park, and Ronald Heath. General model study of scour at proposed pier extensions – Santa Ana River at BNSF Bridge, Corona, California. Coastal and Hydraulics Laboratory (U.S.), 2017. http://dx.doi.org/10.21079/11681/25796.

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Baker, Michael. DTRS56-02-D-70036A Potential Impact Radius Formulae for Flammable Gases other than Natural Gas. Pipeline Research Council International, Inc. (PRCI), 2005. http://dx.doi.org/10.55274/r0012053.

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The original derivation of the PIR formula referenced in 49 CFR 192 is contained in the Gas Research Institute (GRI) report by C-FER Technologies (C-FER), "A Model for Sizing High Consequence Areas Associated with Natural Gas Pipelines" (Stephens 2000). It must be recognized that this formula was derived solely on the premise that thermal radiation from a jet/trench fire is the dominant hazard related to pipe rupture and subsequent ignition. Since natural gas is non-toxic and significantly lighter than air, this premise is valid. However, there are certain pipeline operators transporting flamm

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Mojidra, Rushil, and Keri Ryan. Influence of Vertical Ground Motion on Bridges Isolated with Spherical Sliding Bearings. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2019. http://dx.doi.org/10.55461/rynq3624.

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The motivation for this project developed from testing of a full scale building isolated with triple friction pendulum bearings on the E-defense shake table in Japan. The test demonstrated experimentally that the vertical component of ground motion can amplify both the base shear and the story acceleration in the isolated building. Vertical shaking introduced high-frequency variation in the axial force of the bearings, and, consequently, a high-frequency component in the bearing lateral force, which excited higher structural modes in the building. Since vertical bridges are flexible in the ver

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Ramos-Santiago, Efrain, Yamiretsy Pagan-Albelo, Jeremy Sharp, Curtis Blades, and Kevin Pigg. Evaluation of a permeable dam as an erosion control structure on Coca River, Ecuador. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/47169.

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The effort performed here describes the process to evaluate the scour-protection performance of the proposed permeable dam. The US Engineer Research and Development Center, Coastal and Hydraulics Laboratory, built a 1:50 Froude scaled movable bed section model of the permeable dam structure and tested in a specialized flume that simulates regressive erosion propagation. Profiles were collected at various times to track the progression of the scour. Tests evaluated variations of the proposed structure, which included tetrapods, riprap, bridge piers, and longitudinal piles. For the various propo

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White, G., and R. Pan. Active Queue Management (AQM) Based on Proportional Integral Controller Enhanced PIE) for Data-Over-Cable Service Interface Specifications (DOCSIS) Cable Modems. RFC Editor, 2017. http://dx.doi.org/10.17487/rfc8034.

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Rahmani, Mehran, and Manan Naik. Structural Identification and Damage Detection in Bridges using Wave Method and Uniform Shear Beam Models: A Feasibility Study. Mineta Transportation Institute, 2021. http://dx.doi.org/10.31979/mti.2021.1934.

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This report presents a wave method to be used for the structural identification and damage detection of structural components in bridges, e.g., bridge piers. This method has proven to be promising when applied to real structures and large amplitude responses in buildings (e.g., mid-rise and high-rise buildings). This study is the first application of the method to damaged bridge structures. The bridge identification was performed using wave propagation in a simple uniform shear beam model. The method identifies a wave velocity for the structure by fitting an equivalent uniform shear beam model

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Tawfik, Aly, and Utsav Shah. Analysis of Freight Movements in the San Joaquin Valley. Mineta Transportation Institute, 2023. http://dx.doi.org/10.31979/mti.2023.2131.

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Freight transportation plays a primary role in supply chains, costs, and availability of goods and is a major part of the economy. This study identifies, assesses, and utilizes different data sources to uncover and understand the patterns and movements of different types of freight in the San Joaquin Valley’s (SJV's) different counties. The San Joaquin Valley region consists of eight counties: San Joaquin, Stanislaus, Merced, Madera, Fresno, Kings, and Tulare. This research explored some major datasets with freight information, such as Global Trade Atlas (GTA), Port Imports and Exports Reporti

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