车辆荷载作用下桩承式加筋路基的动力特性分析  

Dynamic Performance Analysis of Pile-supported Reinforced Embankment under the Action of Vehicle Load

作　　者：高广运[1,2] 徐晨晓 谢伟[1,2] 王非 GAO Guangyun;XU Chenxiao;XIE Wei;WANG Fei(School of Civil Engineering, Tongji University, Shanghai 200092, China;Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;Zhengzhou University Muti-functional Design and Research Academy Co., Ltd., Zhengzhou 450001, China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]郑州大学综合设计研究院有限公司,郑州450001

出　　处：《路基工程》2019年第1期23-27,42,共6页Subgrade Engineering

基　　金：国家自然科学基金项目(41772288)

摘　　要：以车辆荷载作用下桩承式加筋路基为研究对象,引入黏弹性人工边界,建立了三维车辆-路基整体有限元分析模型,分析了车辆动荷载作用下桩承式加筋路基的动力响应特性。结果表明:加筋体的存在可有效减小车辆荷载作用下路基的动力响应,随加筋体层数及其弹性模量的增加,路基的动力响应减小更为显著;随着车辆荷载频率的增加,路基路面沉降及内部应力增大;路基竖向位移随桩间距的增加而增加,桩的模量对路基的动力响应也有一定的影响。Taking the pile-supported reinforced embankment under the action of vehicle load as the study object and, with viscoelastic artificial boundary introduced, the three-dimensional vehicle-embankment finite element model was established to analyze the dynamic response of this embankment under vehicle load. The result shows that the reinforcement may reduce the dynamic response of the embankment under vehicle load and, as the layers of reinforcement and its elastic modulus increase, the dynamic response of the embankment reduces to a more obvious extent;as the load frequency increases, the ground subsidence and the internal stress increase;the vertical displacement of the embankment increases with the pile spacing, and the modulus of pile has certain influence on the dynamic response of the embankment.

关 键 词：车辆荷载 桩承式加筋路堤 荷载频率 桩间距 动力响应 

分 类 号：U260.116[机械工程—车辆工程]