Effects of SoilStructure Interaction on Seismic Behavior of Ductile Reinforced Concrete Moment Resisting Frames

University Putra Malaysia (UPM)
Publication Type:
Conference Proceeding
Proceedings of World Housing Congress on Affordable Quality Housing (WHC2007), 2007
Issue Date:
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Neglecting of the effects of soil-structure interaction in modelling of building structures founded on a non-rigid ground as fixed-base columns on a rigid base, creates this concern that the responds obtained from seismic analyses may differ from those on actual structures. As the Iranian Code of Practice for Seismic Resistant Design of Buildings (Standard No. 2800-05) does not address the soil-structure interaction explicitly, the effects of such interaction on behaviour of reinforced concrete buildings with ductile moment-resisting frames, loaded and designed according to the Iranian Building Codes, are studied in this research, using direct soil-structure interaction method. To achieve this objective, four types of structures consisting of 3, 5, 7 and 10 story buildings, which represent the typical buildings in a high risk earthquake prone zone, have been selected in conjunction with three types of soil, representing types II, III and IV, as classified in the Iranian Standard No. 2800-05. Ductile Reinforced Concrete Moment-Resisting Frames, as fixed-base structures, once without soil interaction and the next time considering their soil interaction by direct method are modelled and subjected to different earthquake records. The results of the two cases subjected each to different earthquake records are studied and compared. The Results obtained from these studies indicate that consideration of soil-structure interaction for seismic design, in buildings higher than five stories on soil type IV (Vs<175 m/s) as well as buildings higher than seven stories on soil type III (175
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