单元式石材幕墙易损性分析与抗震韧性评价方法

SEISMIC FRAGILITY ANALYSIS AND RESILIENCE EVALUATION METHOD OF UNITIZED STONE CLADDING

  • 摘要: 建筑非结构系统在地震中常发生比结构系统更为严重的破坏,石材幕墙作为典型且重要的非结构系统,对其进行抗震韧性评价具有重要意义。该文提出了石材幕墙抗震韧性评价方法的一般流程,研究了石材幕墙修复费用及修复时间等评价指标的计算方法;通过开展模拟地震振动台试验探讨了单元式石材幕墙的地震损伤状态分级标准,并通过回归分析得到其易损性曲线;构建了2种建筑布置中4种不同结构体系的石材幕墙案例,通过地震易损性分析,建立了石材幕墙抗震韧性恢复曲线,并给出了对应的抗震韧性评价等级。研究结果表明:提出的石材幕墙抗震韧性评价方法能够有效评价其抗震韧性。楼面峰值加速度可以作为单元式石材幕墙抗震韧性评价的工程需求参数。

     

    Abstract: Building non-structural systems often suffer more severe damage than that of structural systems under earthquakes. As a typical and important non-structural system, it is of great importance to evaluate the aseismic resilience of stone cladding. In this study, a general framework for evaluating the aseismic resilience of stone cladding is proposed, along with the calculation methods for evaluation indicators such as restoration cost and repair time. By conducting a shaking table test, classification criteria of damage states for unitized stone cladding are discussed and fragility curves are obtained. Stone cladding cases for four different structural systems with two types of building layouts are studied. Seismic fragility analysis is conducted, and aseismic resilience recovery curves for stone cladding are established, along with aseismic resilience evaluation grades. The research results indicate that the aseismic resilience evaluation method proposed for stone cladding can effectively evaluate its resilience. The peak floor acceleration can serve as an engineering demand parameter for evaluating the aseismic resilience of unitized stone claddings.

     

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