Evaluation of numerical procedures to determine seismic response of structures under influence of soil-structure interaction

Tabatabaiefar, Hamid Reza and Fatahi, Behzad and Ghabraie, Kazem and Zhou, Wan-Huan (2015) Evaluation of numerical procedures to determine seismic response of structures under influence of soil-structure interaction. Structural Engineering and Mechanics, 56 (1). pp. 27-47. ISSN 1225-4568


In this study, the accuracy and reliability of fully nonlinear method against equivalent linear method for dynamic analysis of soil-structure interaction is investigated comparing the predicted results of both numerical procedures with the results of experimental shaking table tests. An enhanced numerical soil-structure model has been developed which treats the behaviour of the soil and the structure with equal rigour. The soil-structural model comprises a 15 storey structural model resting on a soft soil inside a laminar soil container. The structural model was analysed under three different conditions: (i) fixed base model performing conventional time history dynamic analysis, (ii) flexible base model (considering full soil-structure interaction) conducting equivalent linear dynamic analysis, and (iii) flexible base model performing fully nonlinear dynamic analysis. The results of the above mentioned three cases in terms of lateral storey deflections and inter-storey drifts are determined and compared with the experimental results of shaking table tests. Comparing the experimental results with the numerical analysis predictions, it is noted that equivalent linear method of dynamic analysis underestimates the inelastic seismic response of mid-rise moment resisting building frames resting on soft soils in comparison to the fully nonlinear dynamic analysis method. Thus, inelastic design procedure, using equivalent linear method, cannot adequately guarantee the structural safety for mid-rise building frames resting on soft soils. However, results obtained from the fully nonlinear method of analysis fit the experimental results reasonably well. Therefore, this method is recommended to be used by practicing engineers.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 25 May 2016 04:52
Last Modified: 27 Jul 2016 23:55
Uncontrolled Keywords: soil-structure interaction; shaking table test; inelastic seismic response; equivalent linear method; fully nonlinear method; inelastic design procedure
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
Socio-Economic Objective: B Economic Development > 87 Construction > 8702 Construction Design > 870201 Civil Construction Design
E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: doi:10.12989/sem.2015.56.1.027
URI: http://eprints.usq.edu.au/id/eprint/28100

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