Performance based assessment of dynamic soil-structure interaction effects on seismic response of building frames

Fatahi, B; Tabatabaiefar, HR; Samali, B

Performance based assessment of dynamic soil-structure interaction effects on seismic response of building frames

Fatahi, B

Tabatabaiefar, HR

Samali, B

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Publication Type:: Conference Proceeding
Citation:: Geotechnical Special Publication, 2011, (224 GSP), pp. 344 - 351
Issue Date:: 2011-08-25

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Field	Value	Language
dc.contributor.author	Fatahi, B https://orcid.org/0000-0002-7920-6946	en_US
dc.contributor.author	Tabatabaiefar, HR https://orcid.org/0000-0003-3480-6582	en_US
dc.contributor.author	Samali, B https://orcid.org/0000-0002-3426-7745	en_US
dc.date.issued	2011-08-25	en_US
dc.identifier.citation	Geotechnical Special Publication, 2011, (224 GSP), pp. 344 - 351	en_US
dc.identifier.isbn	9780784411834	en_US
dc.identifier.issn	0895-0563	en_US
dc.identifier.uri	http://hdl.handle.net/10453/19069
dc.description.abstract	Soil-Structure Interaction (SSI) has progressed rapidly in the second half of 20th century stimulated mainly by requirements of the nuclear power and offshore industries to improve the seismic safety. In this study, a fifteen storey moment resisting building frame is selected in conjunction with three different soil deposits with shear wave velocity less than 600m/s. The design sections are defined after applying dynamic nonlinear time history analysis based on inelastic design procedure using elastic-perfectly plastic behaviour of structural elements. These frames are modelled and analysed employing Finite Difference approach using FLAC 2D software under two different boundary conditions, namely fixed-base (no soil-structure interaction), and considering soil-structure interaction. Fully nonlinear dynamic analyses under the influence of different earthquake records are conducted and the results of inelastic behaviour of the structural model are compared. Variations of the shear modulus ratio with the shear strain are included in the nonlinear dynamic analysis. The results indicate that the inter-storey drifts of the structural model resting on soil types De and Ee (according to the Australian standard) substantially increase when soil-structure interaction is considered for the above mentioned soil types. Performance levels of the structures change from life safe to near collapse when dynamic soil-structure interaction is incorporated. Therefore, the conventional inelastic design procedure excluding SSI is no longer adequate to guarantee the structural safety for the building frames resting on soft soil deposits. Design engineers need to address the effects of dynamic SSI precisely in their design especially for construction projects on soft soils. © 2011 ASCE.	en_US
dc.relation.ispartof	Geotechnical Special Publication	en_US
dc.relation.isbasedon	10.1061/41183(418)29	en_US
dc.subject.classification	Geological & Geomatics Engineering	en_US
dc.title	Performance based assessment of dynamic soil-structure interaction effects on seismic response of building frames	en_US
dc.type	Conference Proceeding
utslib.citation.volume	224 GSP	en_US
utslib.for	040407 Seismology and Seismic Exploration	en_US
utslib.for	0905 Civil Engineering	en_US
dc.location.activity	Atlanta, Georgia, USA	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access
pubs.issue	224 GSP	en_US
pubs.publication-status	Published	en_US

Abstract:

Soil-Structure Interaction (SSI) has progressed rapidly in the second half of 20th century stimulated mainly by requirements of the nuclear power and offshore industries to improve the seismic safety. In this study, a fifteen storey moment resisting building frame is selected in conjunction with three different soil deposits with shear wave velocity less than 600m/s. The design sections are defined after applying dynamic nonlinear time history analysis based on inelastic design procedure using elastic-perfectly plastic behaviour of structural elements. These frames are modelled and analysed employing Finite Difference approach using FLAC 2D software under two different boundary conditions, namely fixed-base (no soil-structure interaction), and considering soil-structure interaction. Fully nonlinear dynamic analyses under the influence of different earthquake records are conducted and the results of inelastic behaviour of the structural model are compared. Variations of the shear modulus ratio with the shear strain are included in the nonlinear dynamic analysis. The results indicate that the inter-storey drifts of the structural model resting on soil types De and Ee (according to the Australian standard) substantially increase when soil-structure interaction is considered for the above mentioned soil types. Performance levels of the structures change from life safe to near collapse when dynamic soil-structure interaction is incorporated. Therefore, the conventional inelastic design procedure excluding SSI is no longer adequate to guarantee the structural safety for the building frames resting on soft soil deposits. Design engineers need to address the effects of dynamic SSI precisely in their design especially for construction projects on soft soils. © 2011 ASCE.

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http://hdl.handle.net/10453/19069