【摘要】 建立列车—轨道—路基—周围地层—建筑物系统空间动力分析模型。地基土与建筑物基础间分协调接触变形和弹性接触变形2种情况处理。利用"m"法计算弹性接触变形系数,进行2种接触情况下运行列车对附近建筑物的振动影响动力分析。结果表明:在运行列车作用下,考虑土—建筑物之间弹性相互作用时建筑物楼层的动力响应峰值比不考虑时低5~10 dB;轴重大的列车引起的建筑物振动响应较大;建筑物各楼层的峰值振动强度在总体上随楼层单调递增;峰值振动强度在车速较低时随车速提高而增大,但车速超过某一临界值时,趋势发生改变。更多还原

【Abstract】 In this paper,a space dynamic analysis model of train-track-roadbed-soil-building is presented,in which two types of contact conditions,compatibility contact deformation and elastic contact deformation,are considered in the contact between soil and building foundation.By using the "m" method to compute the elastic contact deformation coefficient and the general laws of building vibrations induced by moving trains can be obtained under two conditions.The results show that the maximum vibration level of building floors can decrease by 5～10 dB when the elastic contact interaction between soil and structure is taken into account.The vibration levels of building floors ascend with the increase of floor numbers,and trains with heavier axle loads induce bigger vibrations than those with lighter ones.The maximum vibration level ascends with train speed in low speed range,but this trend changes when train speed exceeds a certain value.更多还原