基于校准法的地铁振动对西安钟楼影响研究  

STUDY OF SUBWAY VIBRATION IMPACT ON XI'AN BELL TOWER BY CALIBRATION METHOD

作　　者：马蒙[1,2] 刘维宁[1] 邓国华 钱春宇[4] 袁扬[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]中国铁道科学研究院,北京100081 [3]西安市地下铁道有限责任公司,西安710018 [4]机械工业勘察设计研究院,西安710043

出　　处：《工程力学》2013年第12期206-212,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(51278043)

摘　　要：针对西安地铁振动对钟楼影响案例,建立了"车辆-轨道-隧道-土层"3维动力有限元模型,研究了行车速度对3个方向地表振动响应的影响:结果显示,降低车速对控制地表速度峰值效果显著。地铁2号线通车后,首次针对重点古建筑防地铁交通微振动控制问题采用"输入-输出"两位置进行模型校准,测试结果显示,模型输入激励与输出响应均与实测结果吻合良好。校核后的模型用于预测地铁2号线、6号线联合运行下振动响应。比较了拟建6号线3种不同线位,当考虑钟楼微振动控制时,方案2和方案3要优于方案1。In order to research the vibration impact on Bell Tower in Xi＇an, a subway train-track-amnel-soil 3D dynamic FE model was created. The influences of train speed on ground vibration are studied in three directions. Results show that reducing speed has obvious effects on controlling ground PPV. The model calibration method with both two positions of input and output is firstly used to study the important historic building against subway traffic-induced micro vibrations after the subway L2 opened to operate. Simulated results of both input impulse and output response match well with the measurements. The calibration model can be used to predict the vibration responses caused by the combined operation of subway L2 and L6. Three different selected routes for the proposed subway L6 are compared. When considering the micro-vibration control for Bell Tower, the route Scheme 2 and 3 are better than Scheme 1.

关 键 词：地铁振动 古建筑 振动测试 模型校准 数值模拟 

分 类 号：TB533.2[理学—物理]