基于《建筑抗震韧性评价标准》的既有高层剪力墙建筑抗震韧性评价

Seismic resilience assessment of existing high⁃rise shear⁃wall structure based on standard for seismic resilience assessment of buildings

基于《建筑抗震韧性评级标准》GB/T 38591-2020,对某既有高层剪力墙建筑进行了抗震韧性评估,并对建筑抗震韧性评估的影响因素,包括评估过程考虑的不确定范围、结构构件易损性组的归并方式等进行了分析。结果表明:由于各抗震韧性指标的对数正态性不同,计算指标分位值应采取不同的方法;评估过程考虑的不确定性范围、结构构件易损性组的归并方式均对评估结果有一定影响;为此,本文建议抗震韧性评估时,评估过程考虑的不确定性因素范围及相应的指标限值应进一步探讨,不规则结构的结构构件易损性组不应进行归并。

Based on GB/T 38591-2020 Standard for seismic resilience assessment of buildings,the seismic resilience of an existing high⁃rise shear wall building is assessed.A series of influencing factors in the assessment process,including the range of uncertainty considered in the assessment,and the merging of fragility groups of structural members,are analyzed.The results show that different methods should be adopted to calculate the fractional values of seismic resilience indexes because of their different log⁃normality.The range of uncertainty considered in the assessment and the merging of fragility groups of structural members have certain influence on the evaluation results.Correspondingly,it is suggested that the range of uncertainty considered and the corresponding limits of resilience index should be further discussed,and the fragility group of structural members in irregular structures should not be merged.