12·22常州4.2级地震的上海实测信号分析  

Analysis of Shanghai Acceleration Signal of 12·22 Changzhou Earthquake with Magnitude of 4.2

作　　者：任晓崧[1] 宗刚 周球尚[3] REN Xiaosong;ZONG Gang;ZHOU Qiushang(College of Civil Engineering,Tongji University,Shanghai200092,China;State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;Shanghai Digger Inspection Technology Ltd,Shanghai 200092,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092 [3]上海递革检测科技有限公司,上海200092

出　　处：《结构工程师》2022年第6期55-62,共8页Structural Engineers

基　　金：土木工程一类高峰学科建设经费资助。

摘　　要：2021年12月22日江苏省常州市发生了里氏4.2级地震,上海全域均有震感。同济大学校内近期安装的场地—建筑物地震反应融合监测台网,捕捉到本次地震的有效加速度响应信号,5个测站的场地、建筑顶层加速度峰值分别在1~5 cm/s^(2)和1~6 cm/s^(2)。本文对监测数据的时、频规律进行分析,研究了地震动加速度峰值、反应谱以及建筑物楼层响应动力特征(结构基频、频响函数等)等参量,结果表明,本次地震对短周期结构的影响较大。此外,基于实测加速度数据讨论了地震烈度快速评估,各测站的烈度评定结果在1~3度。On Dec. 22,2021, an earthquake with magnitude of 4.2 occurred in Changzhou, Jiangsu Province, which is sensible in Shanghai. The field-structure seismological array,which is recently established at different campuses of Tongji University, got the efficient acceleration signal of this earthquake. The peak ground and building acceleration of five stations are in the range of 1-5 cm/s^(2) and 1-6 cm/s^(2) respectively. By comparative analysis of the field and building signal in time and frequency domain, the peak ground acceleration, response spectrum of ground signal along with the dynamic characteristic of the building signal were studied. The influence of the earthquake on Shanghai is relative sensible to low buildings of short natural period. Rapid intensity assessment by field and structure signal is discussed and the intensity of different campus is 1 to 3.

关 键 词：有感地震 场地—建筑物融合监测 场地加速度峰值 反应谱 烈度评价 

分 类 号：P315.6[天文地球—地震学]