Seismic Behavior Assessment of RC Precast Frame Damaged in Bojnord Earthquake 2017 Considering Soil-Structure Interaction Effects

Document Type : Research Article

Authors

1 School of Civil Engineering, Faculty of Engineering, University of Bojnord, Bojnord, Iran

2 Department of Civil Engineering, Faculty of Engineering, University of Bojnord, Bojnord, Iran

Abstract

Experiences of previous earthquakes show the effects of soil-structure interaction and behavior of beam-column connections on the seismic behavior of the building structures. In this research, seismic vulnerability assessment of RC precast Frames is investigated by consideration of the effect of soil-structure interaction and nonlinear behavior of beam-column connections. The RC precast building represented in this study, damaged in the Bojnord earthquake 2017 and located on the soil type II of Iranian seismic design code. The soil-structure interaction is modeled using the Beam-on-Nonlinear-Winkler foundation. In this procedure, an array of vertical q–z springs are used to capture vertical and rotational resistance of the foundation, while two springs, namely p–x and t–x, are placed horizontally to capture the passive and sliding resistance of the foundation, respectively. The seismic vulnerability and performance of RC precast frames are evaluated using nonlinear static pushover, nonlinear dynamic time-history analyses, and incremental dynamic analyses (IDA). The numerical models are developed using OpenSees software by consideration of the nonlinear behavior of the beam-column joints. The numerical results showed the significant role of soil-structure interaction and beam-column connections on the seismic vulnerability and performance of RC precast buildings. In fact, seismic vulnerability of RC precast buildings was increased by considering soil-structure interaction and beam-column connections effects.

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References

 
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Amirkabir Journal of Civil Engineering
Volume 53, Issue 7
October 2021
Pages 3051-3066

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