Performance-based design method for hybrid coupled PEC wall structure based on reasonable failure modes
ZHOU Qiaoling1,2, ZHAO Shixing1, SU Mingzhou2, SHI Yun3
1. Sichuan Provincial Architectural Design and Research Institute Co., Ltd., Chengdu 610041, China;
2. School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;
3. School of Civil Engineering, Xi’an Shiyou University, Xi’an 710065, China
Abstract：Based on the concept of performance-based design, a performance-based design method of the hybrid coupled PEC wall based on the reasonable failure mode is proposed. The performance goal is to achieve a reasonable failure mode when the structure reaches the target displacement. The design base shear force is determined on the basis of the principle of energy balance, and a lateral force distribution in accordance with the failure mode is given. According to the given plastic coupling ratio, the internal force requirements of the steel coupling beams and the strengthening section at the bottom of the PEC wall piers are obtained. The plastic design method is used to design the steel coupling beams and the strengthening section at the bottom of the PEC wall piers, and the elastic design method is used to design the non-strengthening section of the PEC wall piers, so as to achieve the expected performance goal. According to the proposed performance-based design method based on the reasonable failure mode, a 12-story hybrid coupled PEC wall structure is designed. And the pushover analysis and elastic-plastic dynamic time history analysis are conducted to verify the accuracy of the method. The hybrid coupled PEC wall structure designed by the performance-based design method of reasonable failure mode has good seismic performance. Under the earthquake, all the steel coupling beams first suffered from shear yielding and then the plastic hinges formed at the bottom of the PEC wall piers. The distribution and development of plastic hinges meet expectations, and the design goal of a “two-stage energy dissipation system” is realized.
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