Numerical Simulation and Seismic Fragility Analysis of a Self-Centering Steel MRF with Web Friction Devices |
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| Authors: | Tong Guo Liang-Long Song Guo-Dong Zhang |
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| Institution: | 1. School of Civil Engineering, Southeast University, Nanjing, P.R. Chinaguotong77@gmail.com;3. School of Civil Engineering, Southeast University, Nanjing, P.R. China;4. College of Engineering, University of Notre Dame, Notre Dame, Indiana, USA |
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| Abstract: | This article presents the seismic fragility analysis of a self-centering steel moment-resisting frame (SC-MRF) with web friction devices. A detailed numerical model of the SC frame was developed using the Open System for Earthquake Engineering Simulation (OpenSees) and the elastoplastic responses of the SC-MRF were studied, including the strength degradation under cyclic loading, tendon rupture, beam buckling, bolt bearing and friction loss, etc. The proposed simulation approach is validated by comparing the simulated results with those in existing hybrid-simulation tests, quasi-static pushover test and low cyclic tests, where good agreement is observed. In addition to the well-established performance limit states (i.e., immediate occupancy, collapse prevention and global dynamic instability), two unique performance limit states (i.e., the recentering and repairable limit states) are defined for the SC-MRF. Finally, incremental dynamic analyses are conducted to evaluate the seismic fragilities regarding the five performance limit states. |
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| Keywords: | Self-Centering Moment Resisting Steel Frame Beam Web Friction Device Numerical Simulation Incremental Dynamic Analysis Seismic Fragility |
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