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Article: Dynamic response of deep soft soil deposits under multidirectional earthquake loading

TitleDynamic response of deep soft soil deposits under multidirectional earthquake loading
Authors
KeywordsDeep soft soil deposits
Groundwater table
Horizontal ground motion
Multidirectional earthquake loading
Nonlinear analysis
Vertical ground motion
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/enggeo
Citation
Engineering Geology, 2011, v. 121 n. 1-2, p. 55-65 How to Cite?
AbstractThe analysis of site response to earthquake is of great importance for seismic design of structure. Although it has long been recognized that the ground is simultaneously subjected to both horizontal and vertical motions during a real earthquake, the effect of vertical motion is usually ignored in most site response analyses. Moreover, some studies show that there are significant differences in site responses for saturated and unsaturated soil deposits, and site response is influenced by variation of groundwater table. Therefore, these factors should be considerably considered in the dynamic site response analysis. Based on the results of geological investigation as well as laboratory and field tests conducted in Shanghai, a deep geotechnical profile with a depth of 280. m is analyzed in this paper. By using a verified, fully coupled and inelastic finite element procedure, a series of numerical analyses is carried out for a deep soft soil profile subjected to multidirectional earthquake loadings. Parameters of the model in the procedure are calibrated by field and laboratory tests. Numerical results demonstrate that the behavior of vertical amplification is quite different from the horizontal counterpart. Furthermore, the use of a single horizontal component as seismic input in site response analysis, neglecting the other horizontal component and the vertical one, may result in considerable underestimation of site response. Variation of groundwater table brings about a profound effect on both vertical and horizontal motions, its ratio, the response spectra at ground surface, and excess pore water pressure ratio. The analysis can capture a more complete and fundamental aspects of ground response for preliminary seismic assessment. © 2011.
Persistent Identifierhttp://hdl.handle.net/10722/137252
ISSN
2015 Impact Factor: 2.196
2015 SCImago Journal Rankings: 1.810
ISI Accession Number ID
Funding AgencyGrant Number
Shanghai Leading Academic Discipline ProjectB308
National Natural Science Foundation of China50878155
Tongji University
Funding Information:

This work has been supported by Shanghai Leading Academic Discipline Project (Project Number: B308), the National Natural Science Foundation of China (Project Number: 50878155) and Kwang-Hua Fund for College of Civil Engineering, Tongji University. The authors greatly appreciate the review comments of the two anonymous reviewers.

References

 

DC FieldValueLanguage
dc.contributor.authorChen, QSen_HK
dc.contributor.authorGao, GYen_HK
dc.contributor.authorYang, Jen_HK
dc.date.accessioned2011-08-26T14:21:47Z-
dc.date.available2011-08-26T14:21:47Z-
dc.date.issued2011en_HK
dc.identifier.citationEngineering Geology, 2011, v. 121 n. 1-2, p. 55-65en_HK
dc.identifier.issn0013-7952en_HK
dc.identifier.urihttp://hdl.handle.net/10722/137252-
dc.description.abstractThe analysis of site response to earthquake is of great importance for seismic design of structure. Although it has long been recognized that the ground is simultaneously subjected to both horizontal and vertical motions during a real earthquake, the effect of vertical motion is usually ignored in most site response analyses. Moreover, some studies show that there are significant differences in site responses for saturated and unsaturated soil deposits, and site response is influenced by variation of groundwater table. Therefore, these factors should be considerably considered in the dynamic site response analysis. Based on the results of geological investigation as well as laboratory and field tests conducted in Shanghai, a deep geotechnical profile with a depth of 280. m is analyzed in this paper. By using a verified, fully coupled and inelastic finite element procedure, a series of numerical analyses is carried out for a deep soft soil profile subjected to multidirectional earthquake loadings. Parameters of the model in the procedure are calibrated by field and laboratory tests. Numerical results demonstrate that the behavior of vertical amplification is quite different from the horizontal counterpart. Furthermore, the use of a single horizontal component as seismic input in site response analysis, neglecting the other horizontal component and the vertical one, may result in considerable underestimation of site response. Variation of groundwater table brings about a profound effect on both vertical and horizontal motions, its ratio, the response spectra at ground surface, and excess pore water pressure ratio. The analysis can capture a more complete and fundamental aspects of ground response for preliminary seismic assessment. © 2011.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/enggeoen_HK
dc.relation.ispartofEngineering Geologyen_HK
dc.subjectDeep soft soil depositsen_HK
dc.subjectGroundwater tableen_HK
dc.subjectHorizontal ground motionen_HK
dc.subjectMultidirectional earthquake loadingen_HK
dc.subjectNonlinear analysisen_HK
dc.subjectVertical ground motionen_HK
dc.titleDynamic response of deep soft soil deposits under multidirectional earthquake loadingen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0013-7952&volume=121&issue=1-2&spage=55&epage=65&date=2011&atitle=Dynamic+response+of+deep+soft+soil+deposits+under+multidirectional+earthquake+loading-
dc.identifier.emailYang, J:junyang@hkucc.hku.hken_HK
dc.identifier.authorityYang, J=rp00201en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.enggeo.2011.04.013en_HK
dc.identifier.scopuseid_2-s2.0-79959203469en_HK
dc.identifier.hkuros191302en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79959203469&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume121en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage55en_HK
dc.identifier.epage65en_HK
dc.identifier.isiWOS:000292943100006-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridChen, QS=46661852000en_HK
dc.identifier.scopusauthoridGao, GY=7403171100en_HK
dc.identifier.scopusauthoridYang, J=35605258800en_HK
dc.identifier.citeulike9231333-

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