装配式框架结构隔震体系抗倒塌能力研究

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关键词：装配式框架结构；隔震体系；易损性；安全储备系数；抗倒塌能力中图分类号： TU398+ .6 文献标志码：A 文章编号：1000-0844（2026）01—0025—11DOI：10.20000/j.1000-0844.20250312003

Collapse resistance capacity of isolation systems for prefabricated framed structures

WU Zhongtie'，FAN Pingping²，LI Yangl ，WU Wei' ，HUANG Yalongl（1.School of Civil Engineering，Northwest Minzu University，Lanzhou 73003o，Gansu， China ;2.School of Civil Engineering，Lanzhou Institute of Technology， Lanzhou 730o5o， Gansu，China）

Abstract： An investigation was conducted to ascertain the collapse resistance capacity of the seismic isolation system of prefabricated frame structures （ISPFS）. To this end，a representative ISPFS model was designed using PKPM software. A corresponding finite element model was established using ETABS software，and incremental dynamic analysis was conducted. The structural vulnerability characteristics were studied by obtaining fragility curves under four performance levels with inter-story drift as the damage index. The collapse resistance capacity was evaluated using the collapse margin ratio （CMR）. The results demonstrate that the ISPFS exhibits three primary failure modes： superstructure failure，rubber bearing failure，and isolation pier （column） failure，with the latter being the dominant collapse mode. The studys findings underscore the critical importance of effectively managing rubber bearing damage in enhancing the system's overall collapse resistance.In the context of rare seismic events， the structure demonstrates a CMR of 3.7，which meets the recommended requirement of 2.7 for structural collapse safety. Additionally，it exhibits exceptional resilience to seismic events，maintaining its structural integrity during rare seismic events.maintains excellent collapse resistance capacity under extremely rare earthquakes.

Keywords： prefabricated frame structure; seismic isolation system； fragility； collapse margirratio（CMR）；collapse resistance

0 引言

装配式建筑凭借其模数化设计、标准化施工和轻质高强材料等优势，在国家建筑领域得到了广泛应用，为实现碳中和与碳达峰目标发挥了重要作用。（剩余15290字）