聊城光岳楼木结构地面交通激励模拟及隔振措施研究  

Research on ground traffic excitation simulation and vibration isolation measures on timber structure of Guangyue Tower in Liaocheng

作　　者：孟昭博[1] 胡博森 胡卫兵[2] 赵庆双[1] 金杰[1] 谷新强 

机构地区：[1]聊城大学建筑工程学院,聊城252000 [2]西安建筑科技大学土木工程学院,西安710055

出　　处：《建筑结构》2017年第17期76-81,35,共7页Building Structure

基　　金：国家自然科学基金项目(51378245);陕西科技计划项目(2013K13-02-08);国家文物局项目(2013YBHT007);山东教育厅项目(J14LG53);山东省研究生教育创新计划项目(SDYY13084;SDYY16102)

摘　　要：以聊城光岳楼木结构为研究对象,基于其实测动力特性参数,采用ANSYS软件建立了上部木结构-高台基-地下市政管道及周围土层整体有限元模型,模拟讨论了不同车辆类型、不同车速、安全距离及车辆作用方式等多种工况下光岳楼木结构的振动响应;针对地面交通振源特点,提出了设置环形隔振沟作为减振措施,讨论隔振沟位置、深度、宽度及填充材料对减振效果的影响。结果表明:环形隔振沟的位置、深度对减振效果影响较大,宽度影响较小;硬性填充材料比弹性材料更有利于减振。为减小地面车辆振动对光岳楼木结构的影响,建议将环形隔振沟设置在距光岳楼中心点35m处,深度取6m、宽度取2m,且沟内填充材料混凝土有利于减振。Taking timber structure of Guangyue Tower in Liaocheng as the research object and based on its measured dynamic characteristic parameters,the overall finite element model of the upper timber structure-high pedestal-underground municipal pipes and surrounding soil was established by ANSYS software. The vibration response of timber structure of Guangyue Tower under different working conditions of various vehicle types,vehicle speeds,vehicle safety distances and the modes of vehicle action were discussed. According to the characteristics of ground traffic vibration,circular isolation trench was proposed to set as vibration isolation measures,and the influence of the isolation trench location,depth,the width and filling materials on the damping effect were discussed. The results show that the influence of location and depth of the circular isolation trench on the vibration reduction effect is large,while the effect of the width is less; the rigid filling material is more conducive to vibration reduction than the elastic material. In order to reduce the influence of vehicle vibration of ground traffic on timber structure of Guangyue Tower,it is suggested that the circular isolation trench is arranged 35 m away from the center point of Guangyue Tower,with 6m in depth and 2m in width,and using concrete as the filling material for trench is conductive to vibration isolation.

关 键 词：光岳楼木结构 地面车辆荷载模拟 环形隔振沟 减振 

分 类 号：TU366[建筑科学—结构工程]