地铁运行所致成都博物馆振动全过程性能化分析

发布时间：2018-05-06 03:14

本文选题：性能化分析 + 地铁运行　；参考：《北京交通大学》2014年硕士论文

【摘要】：随着我国地铁交通的快速发展,地铁所致振动与环境保护需求之间的矛盾日益突出,故地铁所致环境振动控制也成为地铁发展亟待解决的关键技术问题。成都地铁2号线从成都博物馆下方穿行,列车通过及启动引起的振动通过周围地层传播,经建筑物基础传至博物馆楼层,使结构产生较大的振动,对博物馆建筑物的性能产生不利影响。本文以成都博物馆为背景,研究成都地铁2号线列车运行所致振动对成都博物馆建筑物的性能影响。主要研究内容包括： 1.首先从基本理论入手,研究了地铁所致振动的原理,包括振动在振源处的产生原理、振动波在土体介质中的传播特性及其引起建筑物的振动行为； 2.对地铁激励下博物馆建筑物的振动响应进行了现场实测,测量地铁附近地面以及建筑物各楼层的振动加速度响应。通过对现场实测数据进行三分之一倍频程分析,得到地铁所致振动在附近场地的传播规律及其引起的博物馆建筑物振动特性； 3.结合相关参数建立“隧道—周围土体—建筑物底板—上部结构”振动传递全过程有限元模型,通过数值模拟的方法对地铁所致博物馆建筑物振动进行仿真分析,计算博物馆建筑物的振动响应,结合相关振动控制标准对计算结果进行评价,同时与实测结果对比,定量分析建筑物的振动性能； 4.成都博物馆工程为解决高烈度区的防震问题,在基础上设置了隔震支座；北侧为避让地铁设置跨度达33m的悬挑结构,托起地上五层结构。通过对三种不同工况的数值计算,比较博物馆靠近隧道侧设置跨度33m悬挑区和底层设置基础隔震支座对建筑物的减隔振贡献。结果表明：博物馆建筑物地上及地下部分的振级和竖、横向加速度峰值与实测结果接近且均满足相关振动控制标准；在博物馆靠近隧道侧设置跨度33m的悬挑结构增加了振动传播路径并带来良好的减振效果,而设置基础隔震支座对隔离博物馆交通振动的效果并不明显。
[Abstract]:With the rapid development of subway traffic in China, the contradiction between the vibration caused by subway and the demand of environmental protection is becoming more and more prominent, so the control of environmental vibration caused by subway has become a key technical problem to be solved urgently in the development of subway. Chengdu Metro Line 2 passes through the Chengdu Museum. The vibration caused by the train passing through and starting spreads through the surrounding strata, and through the foundation of the building to the museum floor, which makes the structure vibrate greatly. Have a negative impact on the performance of museum buildings. Based on Chengdu Museum, this paper studies the effect of vibration caused by train operation on the performance of Chengdu Museum. The main research contents include: 1. Firstly, the principle of vibration caused by subway is studied from the basic theory, including the generating principle of vibration at the vibration source, the propagation characteristics of vibration wave in soil and the vibration behavior of buildings caused by vibration. 2. The vibration response of museum buildings under subway excitation was measured in situ, and the vibration acceleration response of the ground near the subway and each floor of the building was measured. Based on the analysis of 1/3 times frequency range of the field measured data, the propagation law of the vibration caused by the subway and the vibration characteristics of the museum building caused by the subway are obtained. 3. The finite element model of "tunnel, surrounding soil, building floor and superstructure" vibration transfer process is established by combining relevant parameters, and the vibration of museum buildings caused by subway is simulated by numerical simulation method. The vibration response of the museum building is calculated, and the calculation results are evaluated according to the related vibration control standard. At the same time, compared with the measured results, the vibration performance of the building is quantitatively analyzed. 4. In order to solve the problem of earthquake prevention in the high intensity area, the Chengdu Museum has set up the isolation support on the basis, and the north side has set up a cantilever structure with a span of 33 meters to avoid the subway, holding up the five-story structure on the ground. Through the numerical calculation of three different working conditions, the contribution to the vibration isolation of the building is compared between the cantilever area with a span of 33m located near the tunnel side and the foundation isolation support set at the bottom of the museum. The results show that the vibration level and vertical of the above ground and underground parts of the museum buildings are close to the measured results and all of them meet the relevant vibration control standards. The cantilever structure with a span of 33m near the tunnel side of the museum increases the path of vibration propagation and brings a good damping effect, while the effect of isolating the traffic vibration of the museum by setting the base isolation support is not obvious.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U231;U211.3;TU311.3

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