摘要
以西安地铁2、6号线交叉通过钟楼案例为背景,提出通过数值计算与现场测试相结合进行复杂交通环境下古建筑微振动响应的预测方法,并给出应用实例。通过现场测试获得路面交通振动响应及结构动力放大系数,充分利用地铁2号线已开通运营、地铁6号线尚未开工建设这一有利条件,对现况交通振动进行详细测试;同时建立三维动力有限元模型,并采用"振源输入地表响应输出"两位校准法,验证预测模型的有效性;随后利用上述模型及预测方法,研究比较3种不同线路方案、5种列车运行工况下列车振动对钟楼振动的响应。研究结果从控制钟楼振动角度为地铁6号线建设的线路优化提供依据,研究方法可用于其他同类复杂交通环境下木结构振动响应的预测。
By referring to the case of Metro Line 2 overlapping and crisscrossing Line 6 under the Bell Tower, a method for predicting micro-vibration which combines numerical calculation and situ measurement for historic buildings is proposed and applied practically. By making full use of the advantages that Line 2 is in operation while Line 6 is still under design, environmental vibrations caused by road traffic and structure dynamical amplification factor were measured on site first. 3D dynamic Finite Element （FE） models were built and the prediction models were proved to be effective by model calibration at both two positions of impulse-input and response-output. With the help of the prediction method and FE models, vibration responses of Bell Tower under 3 different selected routes for Line 6 and 5 train operation conditions were studied. Results are helpful for the route optimization for vibration control of Line 6. The research method can be referred by similar vibration predictions of timber structures under complex traffic environment.
出处
《都市快轨交通》
北大核心
2014年第3期47-52,共6页
Urban Rapid Rail Transit
基金
国家自然科学基金项目(51278043)
中央高校基本科研业务费专项资金资助(2013JBM061)
关键词
地铁列车
振动
古建筑
振动测试
预测方法
subway train
vibration
historic building
vibration measurement
prediction method
