Generation of Non-uniform support accelerations of topographic site using one recorded accelerogram

This study investigates method of producing non-uniform support acceleration in actual site condition. Factors affecting the non-uniform excitation of topographic site include time delay between the arrival time of incident wave at the canyon floor and any particular point at higher elevation, causi...

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Autores principales:	Mohsen Isari, Reza Tarinejad, Abdullah Sohrabi-Bidar, Seyed Amir Alavi
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2020
Materias:	non-uniform excitation site effect time delay amplification boundary element Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/8aa3146fd506432d84d092ef263d463b
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spelling	oai:doaj.org-article:8aa3146fd506432d84d092ef263d463b2021-11-08T15:53:21ZGeneration of Non-uniform support accelerations of topographic site using one recorded accelerogram2476-39772538-261610.22065/jsce.2018.121279.1487https://doaj.org/article/8aa3146fd506432d84d092ef263d463b2020-09-01T00:00:00Zhttps://www.jsce.ir/article_73685_adf18e7a15bd0bd5f0f85fc186e087ff.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616This study investigates method of producing non-uniform support acceleration in actual site condition. Factors affecting the non-uniform excitation of topographic site include time delay between the arrival time of incident wave at the canyon floor and any particular point at higher elevation, causing phase difference. Another important factor in generating non-uniform accelerations is the topography amplification. Therefore, in the present study, two dimensional models of a canyon site subjected to Ricker wave with different predominant frequencies, shear wave velocities, shape ratios have been developed and the results of boundary element analyses in time domain (HYBRID code) were obtained in different elevations on the canyon surface. Then, by conducting a series of statistical analyses (Symbolic Regression and Genetic Programming) on the results from numerous presumed cases, the relationships for calculating the time delay between support responses of V-shaped canyons was obtained. To verify the accuracy of the proposed relationships, the results were compared with the records from Pacoima dam site during two different earthquakes and good agreement of the results was observed. Eventually, by implementing the presented relationships into random vibration method, non-uniform acceleration of the site was simulated. The results indicate that the proposed relationships have an appropriate level of accuracy to calculate time delay on the V-shaped canyons.Mohsen IsariReza TarinejadAbdullah Sohrabi-BidarSeyed Amir AlaviIranian Society of Structrual Engineering (ISSE)articlenon-uniform excitationsite effecttime delayamplificationboundary elementBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 7, Iss 3, Pp 193-213 (2020)
institution	DOAJ
collection	DOAJ
language	FA
topic	non-uniform excitation site effect time delay amplification boundary element Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	non-uniform excitation site effect time delay amplification boundary element Bridge engineering TG1-470 Building construction TH1-9745 Mohsen Isari Reza Tarinejad Abdullah Sohrabi-Bidar Seyed Amir Alavi Generation of Non-uniform support accelerations of topographic site using one recorded accelerogram
description	This study investigates method of producing non-uniform support acceleration in actual site condition. Factors affecting the non-uniform excitation of topographic site include time delay between the arrival time of incident wave at the canyon floor and any particular point at higher elevation, causing phase difference. Another important factor in generating non-uniform accelerations is the topography amplification. Therefore, in the present study, two dimensional models of a canyon site subjected to Ricker wave with different predominant frequencies, shear wave velocities, shape ratios have been developed and the results of boundary element analyses in time domain (HYBRID code) were obtained in different elevations on the canyon surface. Then, by conducting a series of statistical analyses (Symbolic Regression and Genetic Programming) on the results from numerous presumed cases, the relationships for calculating the time delay between support responses of V-shaped canyons was obtained. To verify the accuracy of the proposed relationships, the results were compared with the records from Pacoima dam site during two different earthquakes and good agreement of the results was observed. Eventually, by implementing the presented relationships into random vibration method, non-uniform acceleration of the site was simulated. The results indicate that the proposed relationships have an appropriate level of accuracy to calculate time delay on the V-shaped canyons.
format	article
author	Mohsen Isari Reza Tarinejad Abdullah Sohrabi-Bidar Seyed Amir Alavi
author_facet	Mohsen Isari Reza Tarinejad Abdullah Sohrabi-Bidar Seyed Amir Alavi
author_sort	Mohsen Isari
title	Generation of Non-uniform support accelerations of topographic site using one recorded accelerogram
title_short	Generation of Non-uniform support accelerations of topographic site using one recorded accelerogram
title_full	Generation of Non-uniform support accelerations of topographic site using one recorded accelerogram
title_fullStr	Generation of Non-uniform support accelerations of topographic site using one recorded accelerogram
title_full_unstemmed	Generation of Non-uniform support accelerations of topographic site using one recorded accelerogram
title_sort	generation of non-uniform support accelerations of topographic site using one recorded accelerogram
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2020
url	https://doaj.org/article/8aa3146fd506432d84d092ef263d463b
work_keys_str_mv	AT mohsenisari generationofnonuniformsupportaccelerationsoftopographicsiteusingonerecordedaccelerogram AT rezatarinejad generationofnonuniformsupportaccelerationsoftopographicsiteusingonerecordedaccelerogram AT abdullahsohrabibidar generationofnonuniformsupportaccelerationsoftopographicsiteusingonerecordedaccelerogram AT seyedamiralavi generationofnonuniformsupportaccelerationsoftopographicsiteusingonerecordedaccelerogram
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Generation of Non-uniform support accelerations of topographic site using one recorded accelerogram

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