土体参数对空沟隔振效果的影响研究  

Research on the Effect of Hollow Ditch in Homogeneous Soil on Vibration Insulation

作　　者：刘晶磊[1,2] 尚康君 周玮浩 张伯扬 魏来星 毕全超 Liu Jinglei;Shang Kangjun;Zhou Weihao;Zhang Boyang;Wei Laixing;Bi Quanchao(Hebei University of Architecture,Zhangjiakou 075000,Hebei,China;Hebei Key Laboratory of Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Zhangjiakou 075000,Hebei,China;Key Laboratory of Road and Railway Engineering Safety of Ministry of Education(Shijiazhuang Tiedao University),Shijiazhuang 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Guizhou Hongxin Chuangda Engineering Monitoring&Consulting Co.,LTD.,Guiyang 550000,China)

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]河北省土木工程诊断、改造与抗灾重点实验室,河北张家口075000 [3]道路与铁道工程安全保障省部共建教育部重点实验室(石家庄铁道大学),石家庄050043 [4]石家庄铁道大学,土木工程学院,石家庄050043 [5]贵州宏信创达工程检测咨询有限公司,贵阳550000

出　　处：《震灾防御技术》2023年第1期171-177,共7页Technology for Earthquake Disaster Prevention

基　　金：河北省高等学校科学技术研究项目(ZD2022017);青海省科技发展专项(2021 QY-217);河北省高等学校人文社会科学研究项目(BJ2019091);河北建筑工程学院校创新基金(XY2023044)。

摘　　要：为分析均质地基中各参数变化对土体振动响应和空沟隔振效果的影响,通过有限元软件建立二维均质地基计算模型,分析空沟尺寸、激振频率等对土体的影响,研究了不同土体弹性模量、密度及泊松比下的振动加速度差异。结果表明,空沟深度为重要影响因素,空沟深度越深,隔振效果越好;空沟宽度对隔振效果几乎无影响;弹性模量对空沟隔振效果的影响较密度大,且弹性模量越大,隔振效果越差;密度对土体振动加速度和振幅衰减系数的影响较小;泊松比对空沟隔振效果的影响大于密度,但低于弹性模量,泊松比越大,振动加速度越小,隔振效果越差;激振频率越大,空沟隔振效果越好。In order to analyze the specific effects of the changes of various parameters in the homogeneous foundation on the vibration isolation effect of the hollow trench,a two-dimensional homogeneous foundation calculation model was established through the finite element software.The model calculation not only analyzes the influence of the hollow trench size and the excitation frequency,but also The difference in vibration acceleration with different soil elastic modulus,density and Poisson’s ratio is discussed.The results show that the depth of the hollow trench is an important factor,and the deeper the hollow trench,the better the vibration isolation effect.The effect of the change on the vibration isolation effect is almost nothing;the effect of the elastic modulus on the vibration acceleration of the hollow trench is not strong,and it can be roughly expressed as the greater the elastic modulus,the greater the vibration acceleration.Density has little effect on vibration acceleration and amplitude attenuation coefficient of soil mass.Poisson's ratio has a greater influence on the isolation effect than the density,but it is lower than the elastic modulus.The larger the Poisson's ratio is,the smaller the vibration acceleration is,and the worse the isolation effect is.The larger the vibration frequency,the better the isolation effect.

关 键 词：空沟 土体参数 隔振效果 振动加速度 激振频率 

分 类 号：TU43[建筑科学—岩土工程]