地铁振动对既有砌体结构影响的试验研究  

Test for effects of metro train-induced vibration on existing masonry buildings

作　　者：夏倩[1] 屈文俊[1] 商晓东[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《振动与冲击》2013年第12期11-16,共6页Journal of Vibration and Shock

基　　金：十一五国家科技支撑计划项目资助(2006BAJ03A07-04)

摘　　要：以某两栋砌体结构为工程实例,对上海某线地铁振动进行了现场实测,分别从振级和1/3倍频程振动加速度级两方面研究了地铁对建筑物振动的影响规律。测试结果表明:对两栋5层砌体结构,楼板振动沿层高呈增大趋势,顶层的竖向振级比底层大2～4dB,水平向振级比底层大6～7 dB,昼间时段中高峰期的三向振级均大于非高峰期的振级,同时昼间时段振级均大于夜间时段振级;房间中央的楼板振动大于墙边和楼梯楼面的振动;地铁对建筑物的振动主要为10～25Hz低频振动。Based on two masonry structures, an situ test was performed to study vibration induced by subway in Shanghai from two aspects of vibration level and frequency. Test results indicated that vibrations of floors increase with increase in height; the vibration acceleration level in vertical direction of the top floor is 2 -4dB larger than that of the ground floor, the vibration acceleration level in horizontal direction of the top floor is 6 -7dB larger than that of the ground floor; the vibration levels in three directions at traffic peak time are all larger than those at non-peak time; the vibration level at daytime is larger than that at night; the vibration at the center of the floor is larger than that at the corner of the floor and that on the staircase; vibrations induced by subway occur mainly within lower frequency range of 10Hz to 25Hz.

关 键 词：地铁振动 既有砌体结构 现场实测 振级 1 3倍频程加速度级VAL 

分 类 号：TU352.1[建筑科学—结构工程]