脉冲型地震动潜在破坏势参数的相关性分析

为了在众多参数中挑选其中最有代表性的参数，来解释和反映脉冲型地震动对结构的潜在破坏能力，以338条脉冲型地震动记录作为研究对象，分析地震动参数与中低层结构响应的相关性。选取了14个常用地震动参数，对各地震动参数之间的相关性进行分析，从中选出7个代表性地震动参数；并将脉冲型地震动输入中低层结构模型中计算结构响应，分析代表性地震动参数与结构响应的相关性，与基于非脉冲型地震动的相关性计算结果进行对比。选用了3层和7层2个RC框架结构作为中低层结构代表，其基本周期为0.62s和0.89s。结果表明:对于脉冲型地震动，对于3层结构时与结构响应相关性最好的为EPV，对于7层结构时与结构响应相关性最好的为PGV，因此可以用PGV和EPV作为表征脉冲型地震动对中低层结构潜在破坏能力的参数；而对于非脉冲型地震动，与结构响应相关性最好的参数为PGV，可以用PGV作为表征脉冲型地震动对中低层结构的潜在破坏能力的参数。因此，通过地震动参数来解释和表征脉冲型地震动对结构的破坏能力是可行的。

Correlation analysison potential damage parameters of pulse-like ground motion

In order to select the representative parameters among many parameters to explain and reflect the potential damage of pulse-like ground motions to structures,338 pulse-like ground motion records are used to analyze the correlation between the parameters of ground motion and the response of mid-and low-rise structures in this paper.Fourteen ground motion parameters are selected to analyze the correlation among them,and seven representative ground motion parameters are selected.The structural response is obtained by inputting pulse-like ground motions into the mid-and low-rise structure models.The correlation between representative ground motion parameters and structural response is analyzed,and the results are compared with those based on non-pulse-like ground motions.Three-story and seven-story RC frame structures are selected as the representatives of the mid-and low-rise structures,and their natural periods are 0.62s and 0.89s.The results show that,for pulse-like ground motions,EPV has ahigher correlation with the three-story structural response,and PGV has a higher correlation with the seven-story structure response.So PGV and EPV can be used to characterize the potential damage of pulse-like ground motions to mid-and low-rise structures.For non-pulse-like ground motions,PGV has a higher correlation with structural response,which can be used to characterize the potential damage of non-pulse-like ground motions to mid-and low-rise structures.Therefore,it is feasible to explain and characterize the potential damage of pulse-like ground motions to structures by ground motion parameters.