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Seismic risk assessment of self-centering prestressed concrete frames with sliding and masonry infill walls: experimental and numerical models

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Abstract

To overcome negative effects of traditional masonry infilling walls (MIWs) on the seismic resilience of a self-centering prestressed concrete (SCPC) frame, a novel SCPC frame with sliding infill walls (SCPC-SIW frame) is proposed. This study compares the seismic performance of the SCPC-SIW frame and the SCPC frame with MIWs (SCPC-MIW frame) through quasi-static tests, fragility analysis, and risk assessment. To begin, quasi-static tests on single-story SCPC-SIW and SCPC-MIW frame specimens are performed to compare their failure characteristics, hysteresis response, energy dissipation, and self-centering ability. The numerical simulation methods for SCPC-SIW and SCPC-MIW frame specimens are then presented and validated. Subsequently, two four-story SCPC-SIW frames and two four-story SCPC-MIW frames are designed, and their dynamic response under MCE is preliminary analyzed. Finally, the fragility analysis and risk assessment of these multi-story SCPC-SIW and SCPC-MIW frames are conducted to determine the probability of their peak inter-story drift ratio (PIDR), residual inter-story drift ratio (RIDR), and peak floor acceleration (PFA) exceeding the specified limit states under any intensity earthquake and within 50 years. The results indicate that, except for cracks caused by fatigue damage appearing on the SIW at the end of loading, the SCPC-SIW frame specimen remains undamaged, whereas the SCPC-MIW frame specimen exhibits diagonal step cracks on the MIW. The hysteresis curve of the SCPC-SIW frame specimen exhibits an ideal and repeatable flag shape, whereas the stiffness and strength of the SCPC-MIW frame specimen degrade during the test. Besides, the probability of exceeding the 4% PIDR and exceeding 0.2% and 0.5% RIDRs within 50 years for the SCPC-SIW frame is significantly lower than that for the SCPC-MIW frame. The SCPC25-MIW frame has a higher probability of exceeding the 1 g PFA within 50 years than the SCPC25-MIW frame. In other cases, the SCPC-SIW frame has a lower probability of exceeding 1 g, 2 g, and 3 g PFA within 50 years than the SCPC-MIW frame.

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The data used in the manuscript are available upon request.

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Funding

This work was supported by the Scientific Research Fund of Multi-Functional Shaking Tables Laboratory of Beijing University of Civil Engineering and Architecture (No. 2023MFSTL02), the Natural Science Foundation of Jiangsu Province (No. BK20230858), the National Natural Science Foundation of China (No. 52308484 and 52125802), the Postdoctoral Fellowship Program of CPSF (No. GZB20230141), the China Postdoctoral Science Foundation funded project (No. 2023M730583) and the Jiangsu Funding Program for Excellent Postdoctoral Talent (No.2023ZB164).

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All authors made substantial contributions to the execution of the work; the analysis and interpretation of data; and the preparation of the work for publication.

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Correspondence to Tong Guo.

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Zhu, R., Guo, T., Xie, L. et al. Seismic risk assessment of self-centering prestressed concrete frames with sliding and masonry infill walls: experimental and numerical models. Bull Earthquake Eng (2024). https://doi.org/10.1007/s10518-024-01916-x

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  • DOI: https://doi.org/10.1007/s10518-024-01916-x

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