济南轨道交通建设中地铁建筑抗震设计标准探讨

An Approach to Seismic Design Standards of Underground Structures in Jinan Rail Transit Subway

针对济南市的地质条件和地震响应特征,在参考国家和其他省市相关抗震设计规范基础上,探讨济南市地铁建筑的抗震设计标准。结论如下:济南轨道交通建设中地铁建筑结构的抗震设防目标拟定为"中震不坏,大震可修",其抗震设防烈度为7度;抗震设计时应考虑场地条件对地震动频谱特性和幅值的影响;地铁建筑结构应分别进行设防地震作用下的内力及变形分析和罕遇地震作用下的变形分析。后续研究中拟通过振动台模型试验,分析确定适用于济南市地铁建筑的抗震设计方法。

With reference to the national and local codes for seismic design, the seismic design standards of underground structures of Jinan subway are discussed,specifically on geological conditions and seismic response characteristics in Jinan. The conclusions are as follows ： the target of seismic fortification of underground structures in Jinan rail transit construction is set as “no damage in medium earthquake and repairable in rare earthquake冶 ,and the seismic fortification intensity is 7; the impact of site conditions on frequency characteristics and amplitude of seismic ground motion should be taken into consideration; the analysis of internal force and deformation under earthquake and that of deformation under rare earthquake should be conducted respectively for building underground structures of subway. In follow-up studies,shaking table model test is recommended to analyze and determine the seismic design methods suitable for underground structures of Jinan rail transit.