【摘要】 从抗震的角度来讲,地铁隧道等地下结构的建设,必然会引起场地土层以及邻近建筑物的地震动力响应发生变化。文章分析了地铁隧道建设前后,场地地表加速度和反应谱的变化情况。计算结果表明:与自由场地地震反应相比,隧道的建设对场地的地震反应特性有很大的影响,并与地震波的频谱特性有很大关系。文中初步给出了一些影响规律,为确定地铁附近已建或新建建筑的设计地震动参数提供了参考依据。建议在地铁等地下工程的规划和设计时考虑工程建设后对地表设计地震动的影响。更多还原

【Abstract】 From the point of seismic design,the underground structures,such as subway,will greatly affect the seismic response of the ground and the buildings which are adjacent to the underground structures.The change of ground surface acceleration and response spectrum are analyzed before and after the subway construction.This paper presents results of numerical analyses:it is obvious that the excavated shallow tunnel has great influence on the design parameters of ground motion,which has close relationship with earthquake wave spectrum characteristics.The rules of variation are generalized in this paper,and the present conclusions can be referenced in seismic design parameters of ground motion and the building adjacent to the subway shallow tunnels.It is suggested that the effect of underground structures on ground motion is taken into consideration when the underground structures are planned and designed.更多还原