Providing Seismic Design Considerations of Low-Rise High Ductility Reinforced Concrete Frames 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 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 main approach of this research is to show that with proper distribution of shear strength of components, storiesو and the whole building, using nonlinear analysis, it is possible to provide a situation that minimizes the building damages in strong earthquakes. Moreover, it is shown that selecting the type of analysis will play an important role in determining the optimal strength distribution. To achieve such a pattern, a frame with a special moment frame system was used as the main model, which was initially designed by linear static analysis, then the optimal strength distribution pattern of the frame was estimated with proper accuracy by repetitive nonlinear dynamic analysis on the building and the structure sections were determined. Then, the buildings, which were designed according to the estimated strength distribution and the code proposed distribution, were evaluated and compared using nonlinear time history analysis under a set of 22 near-fault and far-fault motions. Finally, the best analysis type in the seismic design of high ductility concrete buildings in near-fault and far-fault regions was select.

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Main Subjects

References

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Amirkabir Journal of Civil Engineering
Volume 53, Issue 4
July 2021
Pages 1525-1544

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