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Articoli di riviste sul tema "SEISMIC CONDITION"

Autore: Grafiati

Pubblicato: 11 settembre 2023

Ultima modifica: 25 luglio 2025

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1

Shin, Changsoo. "Sponge boundary condition for frequency‐domain modeling." GEOPHYSICS 60, no. 6 (1995): 1870–74. http://dx.doi.org/10.1190/1.1443918.

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Several techniques have been developed to get rid of edge reflections from artificial boundaries. One of them is to use paraxial approximations of the scalar and elastic wave equations. The other is to attenuate the seismic waves inside the artificial boundary by a gradual reduction of amplitudes. These techniques have been successfully applied to minimize unwanted seismic waves for time‐domain seismic modeling. Unlike time‐domain seismic modeling, suppression of edge reflections from artificial boundaries has not been successful in frequency‐domain seismic modeling. Rayleigh waves caused by c

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2

Kanhaiya, Krishnakant, and Dr Ajay Kumar Jain. "“A Comparative Study of Circular Water Tank in Two Different Loading Conditions (Seismic and Wind Load Condition) using Staad-Pro”." International Journal of Innovative Technology and Exploring Engineering 11, no. 3 (2022): 75–79. http://dx.doi.org/10.35940/ijitee.l9562.0111322.

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In this paper a comparison of the two loading combinations of a circular water tank i.e. seismic and wind load conditions have been made. The STAADPro software has been used to analyze the circular water tank structure and to compare both the loading combinations. Two similar models of a circular water tank were created, provided with the required attributes (i.e. loading conditions, zones etc.) and were analyzed in both, seismic load condition and wind load condition. The comparison of results from both the analyses revealed that, due to lower seismic zones, the effect of earthquake is slight

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Krishnakant, Kanhaiya, and Ajay Kumar Jain Dr. "A Comparative Study of Circular Water Tank in Two Different Loading Conditions (Seismic and Wind Load Condition) using Staad-Pro." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 11, no. 3 (2022): 75–79. https://doi.org/10.35940/ijitee.L9562.0111322.

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<strong>Abstract:</strong> In this paper a comparison of the two loading combinations of a circular water tank i.e. seismic and wind load conditions have been made. The STAADPro software has been used to analyze the circular water tank structure and to compare both the loading combinations. Two similar models of a circular water tank were created, provided with the required attributes (i.e. loading conditions, zones etc.) and were analyzed in both, seismic load condition and wind load condition. The comparison of results from both the analyses revealed that, due to lower seismic zones, the eff

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4

Selvan, Veluswamy. "Seismic Analysis of RCC Water Tanks under Near-Fault Condition." Nanomedicine & Nanotechnology Open Access 8, no. 3 (2023): 1–5. http://dx.doi.org/10.23880/nnoa-16000252.

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Reinforced concrete water tank plays a important role in providing sustainable water supply to the our community. We use water supply for our daily basic needs, industrial needs, agriculture, firefighting purposes etc. Due to its importance factor, water tank’s structural integrity was important during an critical event of time. Seismic design of reinforced concrete water tanks is a critical aspect of ensuring the safety and functionality of these structures during seismic activities. The importance of seismic design for reinforced concrete water tanks extends beyond just safeguarding the tank

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Bhattarai, Shishir, and Prem Nath Maskey. "Effect of Linear Soil Condition on Seismic Inputs." Technical Journal 2, no. 1 (2020): 48–55. http://dx.doi.org/10.3126/tj.v2i1.32829.

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Seismic inputs to structures in terms of risk consistent response spectrum and seismic hazard curves are developed at bedrock level considering ten independent seismic source zone in the vicinity of the Kathmandu valley. The seismic hazard curve is derived by assuming temporal occurrence of earthquakes to follow Poisson model. Response spectrum is developed using an empirical relationship of spectral ordinates with magnitude of earthquakes and epicentral distance. The seismic risk factor is introduced in response spectrum using conditional probabilities. Power spectral density function consist

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6

Janardan, Ankita. "Assessment of RC Frame Structure under Different Seismic Condition." International Journal for Research in Applied Science and Engineering Technology 12, no. 5 (2024): 1852–61. http://dx.doi.org/10.22214/ijraset.2024.61930.

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Abstract: Structures in seismic zones are especially prone to collapse during significant ground motion occurrences. This susceptibility is sometimes linked to flaws in seismic design principles, notably in the selection of suitable structural systems. Equivalent static analysis, which is often employed in seismic design, may not accurately account for the structure's strength and stiffness. As a result, ground floor columns may become highly reinforced, thereby lowering ductility, and causing poor performance. This thesis offers a parametric study of an RC frame structure developed for variou

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Jiang, Huanjun, Yong Wang, and Liusheng He. "Study of Seismic Performance of Chinese-Style Single-Layer Suspended Ceiling System by Shaking Table Tests." Advances in Civil Engineering 2021 (September 13, 2021): 1–14. http://dx.doi.org/10.1155/2021/9861722.

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During some recent earthquakes, the suspended ceiling system (SCS) in buildings suffered severe damage. The seismic performance of SCS attracted more attention from researchers. In this study, full-scale shaking table tests on two Chinese-style single-layer SCSs with different boundary conditions are conducted. The seismic damage and earthquake responses, including acceleration, displacement, and strain responses, are compared. The effect of the boundary condition on the seismic performance of the SCS is studied. It is found that the seismic performance of the SCS is significantly affected by

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8

Duan, Jin Xi, and Z. Shen. "Elastic Seismic Response of Steel-Concrete Composite Frames with Partial Interaction." Applied Mechanics and Materials 268-270 (December 2012): 729–32. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.729.

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The finite element formulations of steel-concrete composite (SCC) beams considering interlayer slip with end shear restraint is established. Elastic seismic response of SCC frame structures under different shear connection stiffness and slip boundary conditions are examined. The influences of the shear connection stiffness and the slip boundary condition on elastic seismic response are analyzed. With the shear connection stiffness increasing, the free vibration frequencies increase and the seismic responses decrease. The natural vibration properties of SCC frame structures and seismic response

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9

Weibull, Wiktor Waldemar, and Børge Arntsen. "Reverse-time demigration using the extended-imaging condition." GEOPHYSICS 79, no. 3 (2014): WA97—WA105. http://dx.doi.org/10.1190/geo2013-0232.1.

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The forward and inverse process of seismic migration and demigration or remodeling has many useful applications in seismic data processing. We evaluated a method to reobtain the seismic reflection data after migration, by inverting the common image point gathers produced by reverse-time migration (RTM) with an extended-imaging condition. This provided a transformation of the results of seismic data processing in the image domain back to the data domain. To be able to reconstruct the data with high fidelity, we set up demigration as a least-squares inverse problem and we solved it iteratively u

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10

Annisa, Risa, Miftahul Jannah, Adhi Harmoko Saputro, and Titik Lestari. "Enhancing Seismic Data Accuracy: An Advanced Health Diagnosis Method for Seismometers Performance Evaluation." Journal of Physics: Conference Series 2866, no. 1 (2024): 012049. http://dx.doi.org/10.1088/1742-6596/2866/1/012049.

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Abstract Seismometers play a crucial role in monitoring seismic activities, yet their performance can degrade over time due to environmental conditions, aging components, and external disturbances. This study introduces an innovative seismometer health diagnosis method based on seismic signal analysis tailored for the Indonesian earthquake station network. The proposed method involves trim signal, signal resampling, filtering, and deconvolution of instrument response to process seismic data from the earthquake station network in Indonesia, specifically from Honshu, Japan 2024 of seismic events

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11

S., D. Futane, I. Dhatrak A., and W. Thakare S. "Assessment of Group of Stone Column Under Sesmic Condition." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 4 (2020): 795–97. https://doi.org/10.35940/ijeat.D7650.049420.

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The study of group of stone column is concerned with evaluation and comparison of the behaviour of group of encased stone column and ordinary stone column for static and seismic load condition. Stone column system with specified geometry is modelled and analysed in FEM software program MIDAS GTS 3D. Analysis is categorised into four cases. Pseudostatic method is used for seismic load calculation. The objective of research is to analyse the performance of stone column by considering the effect of various parameters such as diameter of stone column, static and seismic load condition in cohesive

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12

Zheng, Wen Yi, Jing Zhe Jin, Hai Gong, and Peng Pan. "Study on Evaluating the Seismic Performance of Building According to Detail Seismic Condition." Applied Mechanics and Materials 777 (July 2015): 121–29. http://dx.doi.org/10.4028/www.scientific.net/amm.777.121.

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In the performance- based seismic design, seismic performance of building is differently evaluated according to variant seismic conditions. Most of the application programs for structural design (ETABS, SAP, MIDAS, ANSYS etc.) calculate the performance points of building according to Federal Emergency Management Agency（FEMA）, Applied Technology Council -40 (ATC -40)’s seismic building code and parameters. On this paper, we evaluated the seismic performance of building according to our national seismic building code[1] and parameters and maked suggesti- -ons on the design practice.

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Sava, Paul. "Stereographic imaging condition for wave-equation migration." GEOPHYSICS 72, no. 6 (2007): A87—A91. http://dx.doi.org/10.1190/1.2781582.

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Imaging under the single-scattering approximation consists of two steps: wavefield reconstruction of source and receiver wavefields from simulated and recorded data, respectively, and imaging from the extrapolated wavefields of locations where reflectors occur. Conventionally, the imaging condition indicates the presence of reflectors when propagation times of reflections in the source and receiver wavefields match. The main drawback of a conventional crosscorrelation imaging condition is that it ignores the local spatial coherence of reflection events and relies only on their propagation time

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14

Han, Jianguang, Qingtian Lü, Bingluo Gu, and Jiayong Yan. "Q-Compensated Gaussian Beam Migration under the Condition of Irregular Surface." Remote Sensing 15, no. 15 (2023): 3761. http://dx.doi.org/10.3390/rs15153761.

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The viscosity of actual underground media can cause amplitude attenuation and phase distortion of seismic waves. When seismic images are processed assuming elastic media, the imaging accuracy for the deep reflective layer is often reduced. If this attenuation effect is compensated, the imaging quality of the seismic data can be significantly improved. Q-compensated Gaussian beam migration (Q-GBM) is an effective seismic imaging method for viscous media, and it has the advantages of both wave equation and ray-based Q-compensated imaging methods. This study develops a Q-GBM method in visco-acous

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Luo, Zhi Qun, Shao Lun Huang, and Jian Ru Wan. "Development on Seismic Sensor System with MEMS Technology for Elevator’s Seismic Condition." Applied Mechanics and Materials 713-715 (January 2015): 1009–14. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.1009.

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A large amount of elevators ruined in seismic events since sudden vibrations are bursting when elevator’s cars or counterweights are running. To solve this practical problem, this paper prospered a seismic sensor system with MEMS technology specializing for elevators. The fatal parts are discussed detailed including hardware design consideration, software improvement of sensor accuracy and seismic evaluation algorithm. Finally, two parts of experiments about P-wave and S-wave were verified successfully. To some extents, it’s reliable, suitable and affordable for domestic elevator’s safety on e

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Rahardiawan, Riza, and Catur Purwanto. "STRUKTUR GEOLOGI LAUT FLORES, NUSA TENGGARA TIMUR." JURNAL GEOLOGI KELAUTAN 12, no. 3 (2016): 153. http://dx.doi.org/10.32693/jgk.12.3.2014.256.

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Tujuan penelitian seismik saluran banyak di Laut Flores, Nusa Tenggara Timur adalah untuk mengetahui kondisi geologi bawah permukaan dasar laut. Daerah penelitian merupakan daerah yang aktif secara tektonik dan diekspresikan dalam bentuk prisma akresi, vulkanik tidak aktif dan sesar-sesar aktif yang membentuk morfologi dasar laut. Berdasarkan penafsiran stratigrafi seismik lapisan bawah permukaan dasar laut terdiri dari empat satuan batuan: Batuan Dasar, Prisma Akresi, Gunungapi Bawah Laut, dan Sedimen Klastika. Sedimen Klastika ini dibagi menjadi lima unit.   Kata kunci: seismik,

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Francis, Victor Osaze. "An Overview of Soil-Pile Interaction in Liquefying Soils under Earthquake Condition." INTERNATIONAL JOURNAL FOR INNOVATIVE RESEARCH IN MULTIDISCIPLINARY FIELD 5, no. 9 (2019): 62–69. https://doi.org/10.5281/zenodo.3474174.

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Piles are of enormous structural and geotechnical importance as they help to transfer heavy superstructural loads to the geological formation that carries the superstructure. Piles are used in bridges, high-rise structures and other structures of importance. However, in seismic zones, piles in liquefiable soils are susceptible to failure during earthquake events despite that the current codes of practice provides for the design of piles against seismic effect. This study summarizes the current knowledge of the soil-pile-structure interaction, and behaviour in liquefiable soils subjected to ear

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Lee, Sang Hun, Takao Endo, and Ryutaro Kawana. "The Effect of Wave Propagation on Seismic Response at Transmitting Boundary of Discrete System." Applied Mechanics and Materials 878 (February 2018): 110–14. http://dx.doi.org/10.4028/www.scientific.net/amm.878.110.

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When analyzing the seismic response of a very long elevated structure such as a Shinkansen viaduct, it is common practice to analyze a cutout of the structure under consideration and treat its both ends as free boundaries. This is attributable to the assumption that seismic response analysis assuming free boundary conditions is more conservative than one assuming non-free boundary conditions. In this study, after finding out that response to harmonic ground motion can be greater than under free-boundary conditions if outward energy dissipation occurs from the analysis domain, a series of numer

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Sava, Paul, and Sergey Fomel. "Time-shift imaging condition in seismic migration." GEOPHYSICS 71, no. 6 (2006): S209—S217. http://dx.doi.org/10.1190/1.2338824.

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Seismic imaging based on single-scattering approximation is in the analysis of the match between the source and receiver wavefields at every image location. Wavefields at depth are functions of space and time and are reconstructed from surface data either by integral methods (Kirchhoff migration) or by differential methods (reverse-time or wavefield extrapolation migration). Different methods can be used to analyze wavefield matching, of which crosscorrelation is a popular option. Implementation of a simple imaging condition requires time crosscorrelation of source and receiver wavefields, fol

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Muravieva, Lyudmila V., and Igor G. Ovchinnikov. "Problems of simulating subsea pipeline condition on the arctic shelf under seismic impact." Vestnik MGSU, no. 11 (November 2019): 1456–65. http://dx.doi.org/10.22227/1997-0935.2019.11.1456-1465.

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Introduction. The paper represents an approach to studying a model of interaction of a system ‘pipeline – soil’ under conditions of frost penetration and seismic impact. The given problem is connected with the reclamation of the shelf of the Russian sector of the Arctic. There is a feature of induced earthquakes connected with hydrocarbon production. These earthquakes occur in a few years after the beginning of field development and lead to the worst condition of the pipelines. The research aims to the development of a method for subsea pipeline strength assessment allowing for nonlinear prope

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Fatkhan, Riskiray Ryannugroho, Fernando Lawrens, Rendy Delliansyah, Billy Sugiartono Prabowo, and Mohammad Rachmat Sule. "Application of Cross-hole Seismic Tomography to Inferred Cavities Condition." IOP Conference Series: Earth and Environmental Science 1227, no. 1 (2023): 012014. http://dx.doi.org/10.1088/1755-1315/1227/1/012014.

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Abstract The construction of the Rajamandala hydroelectric power plant civil works has experienced critical problems that arise in the implementation process, with the occurrence of cracks cavities conditions in the headrace tunnel locations. We applied the cross-hole seismic tomography to detect important heterogeneities and mechanical proprieties of the formations between two boreholes in this case inferred cracks cavities condition. The seismic source is inside the borehole “a sparker” and the receivers “hydrophones” are in an adjacent one, the sparker is lowered into the borehole one step

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Dr., Amit Bijon Dutta, and Shukla Durgesh. "Understanding the Effect of Seismic Condition of Steel Silo, as per IS 1893:2024." International Journal of Civil and Structural Engineering Research 13, no. 1 (2025): 1–9. https://doi.org/10.5281/zenodo.15187763.

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<strong>Abstract:</strong> Steel fly ash silos are critical components of industrial plants, particularly in the cement and power generation industries, where fly ash is stored for further use or disposal. Due to their height, large mass, and storage capacity, these structures are subjected to various forces, with seismic conditions being one of the most significant considerations for their stability. This paper explores the impact of seismic conditions on steel fly ash silos, focusing on design considerations and guidelines as per IS 1893:2024, which provides the criteria for seismic design o

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Wen, Zeng-ping, Meng-tan Gao, Feng-xin Zhao, Xiao-jun Li, Hong-shan Lu, and Shao-lin He. "Seismic vulnerability estimation of the building considering seismic environment and local site condition." Acta Seismologica Sinica 19, no. 3 (2006): 292–98. http://dx.doi.org/10.1007/s11589-003-0292-2.

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Dong, Jie. "Time Dependent Rotational Displacement of Retaining Wall under Seismic Condition." Applied Mechanics and Materials 193-194 (August 2012): 1056–60. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.1056.

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A simple pseudo-dynamic method to predict the seismic rotational displacement of retaining wall is developed. The proposed method, which soil-structure interaction is considered, is a combination of the free-field seismic response of soil and pseudo-dynamic method. It is supposed that soil and structure is connected by a series of springs, the dynamic earth pressure is determined by the deformation of springs. So both active and passive conditions can be taken into account by means of different movement direction of retaining wall, no need to know whether active or passive earth pressure happe

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Nayak, Chittaranjan B., and Sunil B. Thakare. "Seismic performance of existing water tank after condition ranking using non-destructive testing." International Journal of Advanced Structural Engineering 11, no. 4 (2019): 395–410. http://dx.doi.org/10.1007/s40091-019-00241-x.

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Abstract There has been a collaborative attempt to address the seismic vulnerability of existing structures in India after an earthquake in Bhuj, Gujarat, in 2001. Seismic diagnosis and seismic retrofit for the existing tanks have become a remarkable issue to be worked since deterioration is a cosmopolitan and natural phenomenon. It is important to know the exact reason for distress and type of distress. To manage such issues, a proper method of repair and rehabilitation with detailed plans and methodology is required. This paper is aimed at evolving systematic investigation metrology for cond

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Zhao, Zhencong, Jingyi Chen, Xiaobo Liu, and Baorui Chen. "Frequency-domain elastic wavefield simulation with hybrid absorbing boundary conditions." Journal of Geophysics and Engineering 16, no. 4 (2019): 690–706. http://dx.doi.org/10.1093/jge/gxz038.

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Abstract The frequency-domain seismic modeling has advantages over the time-domain modeling, including the efficient implementation of multiple sources and straightforward extension for adding attenuation factors. One of the most persistent challenges in the frequency domain as well as in the time domain is how to effectively suppress the unwanted seismic reflections from the truncated boundaries of the model. Here, we propose a 2D frequency-domain finite-difference wavefield simulation in elastic media with hybrid absorbing boundary conditions, which combine the perfectly matched layer (PML)

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Ranysakol, Thuon. "Static and Pseudo Static Analysis of Embankment Slope Stability of Bener Dam, Purworejo Regency, Central Java." IOP Conference Series: Earth and Environmental Science 1233, no. 1 (2023): 012014. http://dx.doi.org/10.1088/1755-1315/1233/1/012014.

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Abstract The Bener Dam is considered as one of the largest rock-fill dams in Indonesia. This dam will impact the inundation area of three main villages in the Wonosobo and Purworejo regency. Since this zoned embankment dam consists of rock-fill and the core material, the stability of the dam slope has to be done to ensure that the dam is stable against any failures including the seismic effects. Moreover, the seismic coefficient in the study area in the seismic analysis of the large dam slope is needed to be used in the analysis which is not yet done from the previous studies. This paper prese

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Lazarević, Luka, Dejan Vučković, Milica Vilotijević, and Zdenka Popović. "Application of seismic tomography for assessment of the railway substructure condition." Structural Health Monitoring 18, no. 3 (2018): 792–805. http://dx.doi.org/10.1177/1475921718774778.

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This article presents results obtained in the research conducted on railway infrastructure in Serbia, which aimed at prediction of substructure condition based on the analysis of track quality. It presents the results of seismic tomography application as non-destructive procedure for assessment of railway substructure condition. Track geometry quality was assessed according to analysis of longitudinal level data, which was recorded during regular track geometry inspections. Track section for application of seismic tomography was chosen on the basis of analysed track geometry data recorded duri

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ULLOA ROJAS, JUAN, JOSE IGNACIO COLOMBO, JOSE WILCHES, and JOSE ALMAZAN. "INFLUENCE OF ANCHORING ON THE SEISMIC FRAGILITY OF BUCKLING IN LIQUID STORAGE TANKS CONSIDERING SOIL-TANK INTERACTION: A CASE STUDY FOR WINE STORAGE TANKS." DYNA DYNA-ACELERADO (October 31, 2023): [ 7 pp]. http://dx.doi.org/10.6036/10978.

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In the last decades, numerous liquid storage tanks have been affected by strong earthquakes, the damage observed ranges from the partial collapse to the total collapse of the storage tanks. Elephant-foot buckling is one of the most common failures observed in these structures, which can provoke their collapse and complete loss of contents. While hydrostatic and hydrodynamic loads typically impact the seismic response of tanks, the soil type on which they are built plays an important role in influencing their performance during earthquakes. However, the soil-tank interaction has not been consid

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Karalar, Memduh, and Murat Çavuşli. "Evaluation of 3D Nonlinear Earthquake Behaviour of the Ilısu CFR Dam under Far-Fault Ground Motions." Advances in Civil Engineering 2019 (January 8, 2019): 1–15. http://dx.doi.org/10.1155/2019/7358710.

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In the recent times, many huge concrete face rockfill dams (CFRDs) have been modelled and constructed in the world, and many of these dams are located on the strong earthquake zones. Examination of the seismic behaviour of a CFR dam built on the seismic zone is very important to assess the safety and future of the dam. For this reason, the nonlinear earthquake behaviour of these dams should be constantly observed taking into account the seismicity of the zone. In this study, three-dimensional (3D) seismic behaviour of the Ilısu dam built on the East Anatolian Fault (EAF) line is examined consi

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Chen, Baokui, Yujie Du, Yan Shi, and Li Fan. "Seismic Analysis of Isolated Continuous Bridge considering Influence of Seawater and Site Condition." Shock and Vibration 2021 (August 23, 2021): 1–17. http://dx.doi.org/10.1155/2021/7599715.

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The effects of seawater and site conditions on the seismic response of the isolated continuous girder bridge are evaluated in this study. The seawater-muddy soil-isolated bridge coupling model is built in the dynamic analysis software ADINA, and the external seismic wave input is realized by the seismic wave motion analysis program. The influences of seawater and muddy soil on the seismic response of isolated continuous girder bridges are determined by comparing different offshore site models. The results indicated that the seawater and the muddy soil magnify the displacement of the seabed. Th

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Pham, Van Vi, Ngoc Anh Do, and Daniel Dias. "Sub-Rectangular Tunnel Behavior under Seismic Loading." Applied Sciences 11, no. 21 (2021): 9909. http://dx.doi.org/10.3390/app11219909.

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Circular and rectangular tunnel shapes are usually chosen when excavating at shallow depths in urban areas. However, special-shaped tunnels such as sub-rectangular tunnels have recently been used to overcome some drawbacks of circular and rectangular tunnels in terms of low space utilization efficiency and stress concentration, respectively. In the literature, experimental studies as well as analytical and numerical models have been developed for the seismic analysis and vulnerability assessment of circular and rectangular tunnels since the early 1990s. However, knowledge gaps regarding the be

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ÇAVUŞLU, Murat. "Assessing Seismic Crack Performance of Diyarbakır Çüngüş Masonry Stone Bridge Considering 2023 Kahramanmaraş, Hatay, Malatya, Gaziantep Earthquakes." Bitlis Eren Üniversitesi Fen Bilimleri Dergisi 12, no. 2 (2023): 544–56. http://dx.doi.org/10.17798/bitlisfen.1263557.

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Examination of the creep behavior of historical buildings and interpretation of seismic failures in historical buildings are of great importance for the safety and future of these important structures. In this study, time-dependent settlement and three-dimensional (3D) seismic analyzes of a historical stone bridge are investigated using the 3D discrete element modeling technique. For the settlement and seismic analyses, the historical single-span Çüngüş bridge which was built in the 18th century in Diyarbakır-Turkey by Ottoman Empire is used. Since Diyarbakır is in a dangerous zone according t

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Fletcher, Robin P., and Johan O. Robertsson. "Time-varying boundary conditions in simulation of seismic wave propagation." GEOPHYSICS 76, no. 1 (2011): A1—A6. http://dx.doi.org/10.1190/1.3511526.

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We propose two new boundary conditions to regulate coherent reflections from the model boundaries in numerical solutions of wave equations. Both boundary conditions have the common feature that the boundary condition is varied with respect to time. The first boundary condition expands or contracts the computational model during a modeling simulation. The effect is to cause a Doppler shift in the reflected wavefield that can be used to shift energy outside a frequency band of interest. In addition, when the computational domain is expanding, the range of possible incidence angles on the boundar

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Ocak, E. Canan, and Alp Caner. "Condition factor for seismic performance of deteriorated bridges." Bridge Structures 15, no. 4 (2019): 187–96. http://dx.doi.org/10.3233/brs-190160.

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Yajima, T., and H. Nagahama. "Kawaguchi space, Zermelo's condition and seismic ray path." Nonlinear Analysis: Real World Applications 8, no. 1 (2007): 130–35. http://dx.doi.org/10.1016/j.nonrwa.2005.06.004.

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37

Li, Yong Bo, Hong Ru Zhang, and Chun Feng Li. "Longitudinal Seismic Response Analysis of MSSS Bridge in Qinghai-Tibet Railway." Advanced Materials Research 250-253 (May 2011): 2667–71. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.2667.

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Abstract (sommario):

This paper presents the results of seismic behavior analysis of a multi-span simply supported (MSSS) bridge in Qinghai-Tibet Railway. The main goal is to examine the effects of frozen soil condition and wave passage on seismic behavior of MSSS Bridge. A 2D FE model was established by ANSYS software in order to evaluate the effects of modeling, in which bearings and pounding effects were also considered. Results indicate that frozen soil condition has an important effect on the seismic response in longitudinal direction; wave passage can influence the seismic response of MSSS Bridge within a ce

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38

Kuznetsov, Sergey V., and Aybek E. Nafasov. "Horizontal Acoustic Barriers for Protection from Seismic Waves." Advances in Acoustics and Vibration 2011 (September 21, 2011): 1–8. http://dx.doi.org/10.1155/2011/150310.

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Abstract (sommario):

The basic idea of a seismic barrier is to protect an area occupied by a building or a group of buildings from seismic waves. Depending on nature of seismic waves that are most probable in a specific region, different kinds of seismic barriers can be suggested. Herein, we consider a kind of a seismic barrier that represents a relatively thin surface layer that prevents surface seismic waves from propagating. The ideas for these barriers are based on one Chadwick's result concerning nonpropagation condition for Rayleigh waves in a clamped half-space, and Love's theorem that describes condition o

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39

Raman, Ravi Shankar, Shaik Anjimoon, Anandhi R J, et al. "Parametric Study of Three Dimension RCC Frame Structure for During Earthquake Condition." E3S Web of Conferences 507 (2024): 01030. http://dx.doi.org/10.1051/e3sconf/202450701030.

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Abstract (sommario):

In India’s seismically active region, the necessity for earthquake-resistant structures is highlighted by seismic waves that alter the motion of the earth. Response spectrum analysis combines modal responses via techniques including CQC, and ABS, taking into account a variety of response modes. This study compares earthquake loads using various soil types in Zone III and evaluates building performance during seismic events. The primary goal of the entire project is to analyse the seismic response of multistory buildings. Staad Pro Software does load calculations in order to analyse the entire

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40

Ji, Hua. "Finite Element Analysis of Wire Mesh Frame Wallboard under Seismic Action." Applied Mechanics and Materials 256-259 (December 2012): 2019–23. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.2019.

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Abstract (sommario):

According to the force condition of wire mesh frame wallboard under seismic action, finite element program is used to conduct the deformation simulation analysis of 12 test pieces under different working conditions, obtaining the influencing factors that affect the deformation of wire mesh frame wallboard under vertical seismic action, which offers theoretical foundation for the design of wire mesh frame wallboard.

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41

Yang, Xiao Min. "Design on Engineering Database of Bridge Seismic CAD System." Advanced Materials Research 998-999 (July 2014): 962–65. http://dx.doi.org/10.4028/www.scientific.net/amr.998-999.962.

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Abstract (sommario):

Engineering database was the core of Bridge Seismic CAD System. It was a new engineering database for bridge seismic design based on relation database and data characteristic of bridge seismic design. The engineering databasewas suitable for storage and managing data of bridge seismic design, it was also created condition for data storage andmanagement of Bridge Seismic CAD System.

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42

Kurniawandy, Alex, and Shoji Nakazawa. "Seismic performance evaluation of existing building using Seismic Index method." MATEC Web of Conferences 276 (2019): 01015. http://dx.doi.org/10.1051/matecconf/201927601015.

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Abstract (sommario):

Indonesia has frequently suffered major damaging earthquakes over the past 50 years. There are thousands of buildings in earthquakeprone regions that require seismic evaluation and rehabilitation. This paper describes a study about the seismic evaluation of existing buildings using seismic index method based on a Japanese standard. The basic seismic index is calculated based on the criteria of strength and ductility. Two existing buildings have been evaluated in this research. The first building consists of five stories and the second one has four. The seismic index of the structure has a diff

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43

Cao, Weiping, and Gerard T. Schuster. "Antialiasing condition and filter for the reciprocity equation of correlation type." GEOPHYSICS 75, no. 6 (2010): WB219—WB224. http://dx.doi.org/10.1190/1.3495542.

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Abstract (sommario):

An antialiasing formula has been derived for interferometric redatuming of seismic data. More generally, this formula is valid for numerical implementation of the reciprocity equation of correlation type, which is used for redatuming, extrapolation, interpolation, and migration. The antialiasing condition can be, surprisingly, more tolerant of a coarser trace sampling compared to the standard antialiasing condition. Numerical results with synthetic vertical seismic profile (VSP) data show that interferometry artifacts are effectively reduced when the antialiasing condition is used as a constra

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44

Jain, Payal. "Comparative Study of Soil Structure Interaction Analysis of Building on Clayey and Sandy Soil." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (2021): 57–65. http://dx.doi.org/10.22214/ijraset.2021.37919.

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Abstract (sommario):

Abstract: Present days the analysis of structure with seismic design is more popular. because the first priority of the engineer is effective and durable structure. There are two type of base system first is rigid and second is flexible. In case of flexible base structure, only seismic analysis is not give very effective results. In this condition the SSI effect is more significant and give effective results for flexible base system. The term Soil Structure Interaction (SSI) means interaction between soil to the substructure. This effect give more accurate results after consider in the seismic

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45

Fan, Xiunan, Zhangqing Sun, Fuxuan Han, et al. "Description of Random Heterogeneity and Characteristic Analysis of Wave Field in Near-surface Medium." Journal of Physics: Conference Series 2651, no. 1 (2023): 012055. http://dx.doi.org/10.1088/1742-6596/2651/1/012055.

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Abstract (sommario):

Abstract Random heterogeneity of near surface medium is caused by weathering layer, desert and gravel layer etc. For seismic exploration in this complex area, it is helpful to improve the exploration effect that detailed description of this heterogeneity and in-depth analysis the characteristics of seismic wave field in this medium. In order to figure out the above-mentioned issue, firstly, a regional multi-scale disturbance random medium modeling method in complex topographical conditions is proposed to describe the random heterogeneity of near-surface medium. Secondly, in the condition of un

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46

Barkha, Verma Anurag Wahane. "Mr." International Research Journal of Engineering and Technology 06, no. 09 (2019): 1645–52. https://doi.org/10.5281/zenodo.4878001.

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Abstract (sommario):

The study is to analyze & compare the seismic response G+9 storey RCC frame structure with varying soil condition (Hard, Medium and Soft soil) for seismic Zone V using latest software package STAAD Pro. The structural & seismic parameters are kept same for Model M1, M2 & M3 except the soil type. All three models are analyzed in Staad pro V8i software using the Equivalent Static method of seismic analysis. The response of the model is examined in terms of the maximum storey displacement, compressive stress in columns and quantity of steel required. The objective of the study is chec

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47

Khakimov, Gayrat Akramovich Abduraimova Khadicha Rakhmankulovna Muminov Abdujamil Abduxalilovich Berdimurodov Abdukihayum Sobirova Zulfiya. "DETERMINATION OF THE CALCULATED (PERMISSIBLE) PRESSURE ON THE LOESS FOUNDATION OF BUILDINGS AND STRUCTURES IN SEISMIC CONDITIONS." INTERNATIONAL BULLETIN OF ENGINEERING AND TECHNOLOGY 3, no. 6 (2023): 61–66. https://doi.org/10.5281/zenodo.8019740.

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Abstract (sommario):

This scientific article provides an improved method for determining the allowable (calculated) pressure on the loess foundation of buildings and structures during earthquakes. This improved method for determining the design pressure on the foundation is based on the condition that the average pressure from a structure erected in seismic areas should not exceed its design value, which is determined taking into account changes in the strength characteristics of soils during earthquakes. Obviously, in this case, when calculating the foundations for deformations, the additional seismic settlement

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48

Astawa, Nyoman, and Wayan Lugra. "GEOLOGI BAWAH PERMUKAAN DASAR LAUT BERDASARKAN PENAFSIRAN REKAMAN SEISMIK PANTUL DANGKAL SALURAN TUNGGAL DI PERAIRAN SELAT SUNDA." JURNAL GEOLOGI KELAUTAN 12, no. 2 (2016): 103. http://dx.doi.org/10.32693/jgk.12.2.2014.250.

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Abstract (sommario):

Penelitian ini bertujuan untuk mengetahui kondisi geologi bawah permukaan dasar laut dengan metode seismik pantul dangkal saluran tunggal, dan pemeruman. Seismik stratigrafi daerah penelitian dapat dibedakan menjadi 3 (tiga) unit, yaitu Unit 1 diinterpretasikan sebagai batuan intrusi, Unit 2 yang dekat dengan Pulau Jawa sebagai batuan volkanik dan yang dekat dengan Pulau Sumatera diduga sebagai Formasi Lampung, dan batuan lava andesit, serta Unit 3 diinterpretasikan sebagai sedimen Kuarter. Kedalaman permukaan dasar yang dapat direkam berkisar antara -5 hingga -125 meter dengan perubahan yang

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49

Hong, Tae-Kyung, Jeongin Lee, Giha Lee, Junhyung Lee, and Seongjun Park. "Correlation between Ambient Seismic Noises and Economic Growth." Seismological Research Letters 91, no. 4 (2020): 2343–54. http://dx.doi.org/10.1785/0220190369.

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Abstract (sommario):

Abstract Human activity is a major source of high-frequency seismic noise. Long-term ambient seismic noise levels and their influencing factors are investigated. The diurnal seismic noise level in 5–15 Hz display high correlation with human activities including traffic and industrial operations that are related to economic conditions. The temporal noise-level variations are consistent among three components. Analysis with seismic noises in three consecutive months of each year enables us to estimate the noise levels without seasonal effects. The daytime seismic noise-level changes in major cit

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50

Han, Fang, Dong Wang Zhong, and Ji Yun Mo. "Discriminant Condition of Influencing Dynamic Response for Structure-Equipment System." Applied Mechanics and Materials 90-93 (September 2011): 1477–81. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.1477.

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Abstract (sommario):

In structure-equipment system, there are complex dynamic interactions between structures and equipments. A fast discriminant condition whether the interaction will increase or decrease dynamic response of the structure is achieved in this paper. When the load frequency lies between the basic frequencies of the combined system, it decreases the absolute response of the structure and vice versa. In engineering project, the seismic load can be expanded based on ground characteristic frequency by Fourier transform, so our conclusion can be extended to seismic design for combined systems. Finite el

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