周期性波组块对高架桥临近场地的减振分析  

Vibration reduction analysis of viaduct adjacent site by periodic wave block

作　　者：于可辉 何旭辉[1,2] 邹云峰[1,2] 蔡陈之 YU Kehui;HE Xuhui;ZOU Yunfeng;CAI Chenzhi(School of Civil Engineering,Central South University,Changsha 410075,China;Hunan Provincial Key Laboratory for Disaster Prevention and Mitigation of Rail Transit Engineering Structures,Central South University,Changsha 410075,China)

机构地区：[1]中南大学土木工程学院室,湖南长沙410075 [2]中南大学轨道交通工程结构防灾减灾湖南省重点实验室,湖南长沙410075

出　　处：《华中科技大学学报（自然科学版）》2022年第1期88-92,104,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51908554,U1934209);湖南省自然科学基金资助项目(2020JJ5712)。

摘　　要：以周期性波组块对轨道交通高架桥上行车致场地振动的减振效果为研究对象,采用ABAQUS有限元软件建立轨道板-桥梁-桩基础-场地-波阻块三维有限元模型.提取SIMPACK所建立的车-轨-桥耦合数值模拟中的扣件反力作为激励条件,基于有限元方法分析了周期性波阻块结构衰减域的分布规律,并对有限周期性波阻块结构减振效果的影响因素进行了分析.结果表明:当列车运行引起的场地振动频率落在衰减域范围之内时,周期性波阻块结构对场地在竖直和水平方向上的振动均可以获得较好的减振效果.通过合理设置波阻块的层数、几何尺寸及与桥墩侧面的距离,可以使周期性波阻块结构在低频范围内起到很好的隔振作用.Taking the damping effect of periodic wave block(WIB)on the site vibration reduction caused by driving on the rail transit viaduct as the research object,the three-dimensional finite element model of track slab bridge pile foundation site wave resistance block was established by using ABAQUS finite element software.The fastener reaction force in the vehicle rail bridge coupling numerical simulation established by SIMPACK was extracted as the excitation condition.Based on the finite element method,the distribution of attenuation domain of periodic wave block structure was analyzed,and the influencing factors of vibration reduction effect of finite periodic wave block structure were analyzed.The results show that,the periodic WIB could reduction vibration in both vertical and horizontal directions,when the frequency of the ground vibration signals was fallen within the attenuation zones.By reasonably chosen the geometry size of the periodic WIB,the cube core size of the basic element,initial location of the periodic WIB,the periodic WIB could effectively reduce the low frequency vibration.

关 键 词：轨道交通高架桥 周期性波阻块 场地振动 减振 参数化分析 

分 类 号：TU24[建筑科学—建筑设计及理论] O328[理学—一般力学与力学基础]