IV类场地某医院隔震结构抗震设防参数确定*

(中国地震局第一监测中心,天津 300180)

隔震结构; 设计反应谱; 地震动时程; 抗震设防参数; IV类场地

Determination on Earthquake Resistance Protection Parameters of Isolated Structure Hospital in the Site IV
XIA Feng,SONG Cheng-ke,MENG Qing-xiao,GUAN Jian

(First Crust Monitoring and Application Center,CEA,Tianjin 300180,China)

isolated structure; design response spectrum; time history of earthquake ground motion; earthquake resistance protection parameters; the site IV

备注

针对隔震技术在IV类场地应用抗震设防参数不明确问题,以天津塘沽某医院工程场地抗震设防参数确定为例,在充分考虑了工程场地的地震环境和地质条件的基础上进行土层反应分析,给出了场地相关反应谱,按当前的法律法规标定场地相关反应谱给出了场地设计谱,再以场地设计谱为目标谱拟合给出了地表设计地震动时程(包括人造地震动时程和调整后天然时程),满足了隔震结构抗震设计对抗震设防要求,有利于隔震技术在IV类场地建筑结构中的应用推广。

Aiming at the problem that the parameters of seismic fortification acceleration are uncertain on the application of seismic isolation technology in the IV site,we study a case of determining the seismic fortification acceleration parameters of a hospital in Tanggu district of Tianjin. Based on the seismic environment and the geological conditions of engineering site,we analyzed the soil response and obtained the site response spectrum. According to the current laws and regulations,we took the site design spectrum as the target spectrum to calibrate the relevant response spectra and got the site design spectrum,which fit and obtained the design ground motions time history(including artificial ground motion time history and adjusted natural time history). This method meets the requirements time history for seismic resistance well and is favorable for popularization and application of seismic isolation technology on building in IV site.