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列车运行引起的振动通过周围地层传播,会引起附近地下结构以及邻近建筑物的二次振动,从而对建筑物的使用性能产生影响。以成都博物馆为背景,结合相关参数建立“隧道-周围土体-结构底板-上部结构”整体有限元分析模型,计算博物馆的振动响应,结合振动控制标准对分析结果进行评价并与实测结果对比,定量分析结构的振动响应。分析结果表明:博物馆建筑物地上部分及地下部分的振级和竖、横向加速度峰值,与实测结果基本吻合,均满足振动控制标准;靠近隧道侧结构设置跨度33 m悬挑区,增长了传播路径,具有良好的减振效果。
Vibration caused by train operation spreads through the surrounding strata, causing secondary vibrations of nearby underground structures and adjacent buildings, thus affecting the serviceability of buildings. Taking the Chengdu Museum as the background and the relevant parameters, a “finite element analysis model of tunnel - surrounding soil - structural floor - superstructure” was established to calculate the vibration response of the museum. The analysis results were evaluated in accordance with the vibration control standards and compared with the measured results Contrast, quantitative analysis of the structure of the vibration response. The analysis results show that the vibration level and the vertical and horizontal acceleration peaks of the aboveground part and underground part of the museum buildings are in good agreement with the measured results and meet the vibration control standards. The cantilever zone with a span of 33 m is set close to the tunnel side structure to increase the propagation path , With good damping effect.