【作者】 汪维依； 冀昆； 温瑞智； 任叶飞； 尹建华；

【Author】 WANG Wei-yi;JI Kun;WEN Rui-zhi;REN-Ye-fei;YIN Jian-hua;Institute of Engineering Mechanics, China Earthquake Administration;Key Laboratory of Earthquake Engineering and Engineering Vibration of China Earthquake Administration;

【机构】 中国地震局工程力学研究所； 中国地震局地震工程与工程振动重点实验室；

【摘要】 以包含残余永久位移和速度脉冲的强震动记录为重点分析对象,针对强震动滤波以及基线校正方式等不同处理方式对结构弹塑性响应的影响展开研究。考虑了多项式基线校正,Butterworth滤波,以及考虑残余位移的基线校正方式等多种常用的强震动记录处理流程和方法。以日本311地震,台湾集集地震,台湾花莲地震等典型强震动记录为输入,通过单(多)自由度体系以及典型平面RC框架的数值模拟结果,从结构弹塑性需求,层延性需求,以及最大层间位移角等指标探讨了不同记录处理方式对结构弹塑性响应的影响。结果表明对于不含速度脉冲也不含永久位移的强震动记录,记录处理与否对于弹塑性时程分析结果的影响并不显著,实际操作中通过简单的Butterworth滤波滤除环境噪声即可。对于包含速度脉冲或(及)永久位移的强震动记录,Butterworth滤波在滤除噪声的同时也对速度脉冲形状和地表永久位移的影响较大,并会传递到最后的弹塑性时程分析结果中,且对短,中,长周期结构均可能产生影响。当采用包含速度脉冲与永久位移的大震近断层强震动记录作为地震动输入时,推荐采用基于基线趋势线校正的处理方法。更多还原

【Abstract】 In this study, we focus on the records with permanent displacement and(or) velocity pulse and compared the impact of different process procedure on the structural response. We firstly classified the strong ground motion into four categories and picked typical records from different earthquake events, e.g. Hualien earthquake, Chi-Chi earthquake in Taiwan and the 2011 Tokyo earthquake in Japan. These records were processed using different filtering and baseline correction process methods. The corresponding SDOF/MDOF inelastic demand and EDPs of RC frames were computed and compared. For ground motions without pulse-like velocity and permanent displacement, the process have negligible effect on the structural response. For the records with pulse-like velocity and(or) permanent displacement, the Butterworth filtering method will significant distort the pulse portion and erase the permanent displacement, which will further influence the structural response regardless of the structural fundamental periods. For the near-fault ground motions under destructive earthquake events, it is recommended using the baseline trend line correction processing method before structural time-history analysis.更多还原