Evaluation of pounding effects between reinforced concrete frames subjected to far-field earthquakes in terms of damage index

S. H. Hosseini1, H. Naderpour1, R. Vahdani1, R. Jankowski2
1Faculty of Civil Engineering, Semnan University, Semnan, Iran
2Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Gdansk, Poland

Tóm tắt

In this paper, three different damage indexes were used to detect nonlinear damages in two adjacent Reinforced Concrete (RC) structures considering pounding effects. 2-, 4- and 8-story benchmark RC Moment Resisting Frames (MRFs) were selected for this purpose with 60%, 75%, and 100% of minimum separation distance and also without any in-between separation gap. These structures were analyzed using the incremental dynamic analysis method under 44 far-field ground motion records. Comparison of the results between the MRFs with and without considering pounding effects show that collisions lead to a decrease in the values of coefficient of determination and the nonlinear damage occurs in lower seismic intensity. As a result, using the damage indexes, nonlinear damages can be detected during a specific seismic intensity. Moreover, considering a minimum separation distance leads to an increase in the coefficient of determination between the damage index and the maximum story drift ratio. Furthermore, due to pounding, shorter MRFs are damaged more significantly than the taller structures.

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Tài liệu tham khảo

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