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Earthquakes and Structures Volume 26, Number 3, March 2024 , pages 175-189 DOI: https://doi.org/10.12989/eas.2024.26.3.175 |
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Whole-working history analysis of seismic performance state of rocking wall moment frame structures based on plastic hinge evolution |
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Xing Su, Shi Yan, Tao Wang and Yuefeng Gao
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| Abstract | ||
| Aiming at studying the plastic hinge (PH) evolution regularities and failure mode of rocking wall moment frame (RWMF) structure in earthquakes, the whole-working history analysis of seismic performance state of RWMF structure based on co-operation performance and PH evolution was carried out. Building upon the theoretical analysis of the elastic internal forces and deformations of RWMF structures, nonlinear finite element analysis (FEA) methods were employed to perform both Pushover analysis and seismic response time history analysis under different seismic coefficients (delta). The relationships among PH occurrence ratios (Rph), inter-story drifts and delta were established. Based on the plotted curve of the seismic performance states, evaluation limits for the Rph and inter-story drifts were provided for different performance states of RWMF structures. The results indicate that the Rph of RWMF structures exhibits a nonlinear evolution trend of "fast at first, then slow" with the increasing of delta. The general pattern is characterized by the initial development of beam hinges in the middle stories, followed by the development towards the top and bottom stories until the beam hinges are fully formed. Subsequently, the development of column hinges shifts from the bottom and top stories towards the middle stories of the structure, ultimately leading to the loss of seismic lateral capacity with a failure mode of partial beam yield, demonstrating a global yielding pattern. Moreover, the limits for the Rph and inter-story drifts effectively evaluate the five different performance states of RWMF structures. | ||
| Key Words | ||
| co-operation performance; failure mode; plastic hinge (PH) evolution; plastic hinge occurrence ratios (Rph); rocking wall moment frame (RWMF) structures; seismic performance state | ||
| Address | ||
| Xing Su and Shi Yan: School of Civil Engineering, Shenyang Jianzhu University, 25 Hunnan M. Road, Hunnan District, China Tao Wang: Qingdao Country Garden Bolin Real Estate Co., Ltd., Yunzhu Apartment, Nanning Road, Shibei District, China Yuefeng Gao: Yantai Zhifu District Comprehensive Administrative Law Enforcement Bureau, 40 Airport Road, Zhifu District, China | ||