Providing Seismic Design Considerations of Low-Rise Reinforced Concrete Special Moment Frame Using Nonlinear Analysis

Document Type : Research Article

Authors

1 M.Sc. student Department of Civil Engineering Science and Research Branch Islamic Azad University

2 Assistant Professor Department of Civil Engineering Science and Research Branch Islamic Azad University

Abstract

Traditionally, the seismic design of buildings has been based on strength criteria. In spite of the design using elastic codes, the damage was very high because the elastic method of seismic design has failed to provide insight into how the building behaves during earthquakes. The current study demonstrates that conditions can be created to minimize building failure in a strong earthquake by the use of nonlinear analysis to properly distribute the strength in the components, stories, and the entire building. It is also shown that the type of analysis will play a significant role in achieving the proper optimal strength distribution. To achieve this, a main 3D reinforced concrete special moment frame was designed using static linear analysis. The optimal strength distribution pattern of the frame was estimated using repetitive nonlinear dynamic analysis (nonlinear response history analysis, in chapter 16 of FEMA P-1050-1) for accurate design of the frame and the building sections were determined. The estimated strength distribution and proposed distribution of the code for the designed building were compared using nonlinear dynamic analysis under an ensemble of 22 near-fault and far-fault ground motions. The best type of analysis for the seismic design of reinforced concrete special moment frame in far-fault and near-fault zones was identified.

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