粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2010NO.4 专题研究 FWD荷载作用下沥青路面动力响应有限元分析 Mechanics analysis of Dynamic Response on Asphalt Pavement Subjected to FWD Loads by Finite Element Method 闫启琨，钱劲松 (同济大学道路与铁道工程系，上海201804) 摘要：根据弹性层状理论，应用大型通用有限元分析软件Abaqus 采用无限元技术模拟边界条件建立了沥青路面 的二维模型，计算了其在FWD荷载作用下的动力响应.对路面材料的回弹模量、阻尼等参数的取值进行了探讨，并分析 了敏感参数土基模量的变化对路面结构动力响应的影响.为了解沥青路面在动力荷载作用下的工作状况提供了依据. 关键词：落锤式弯沉仪；无限元：阻尼；土基模量；动力响应 中图分类号：U416.217 文献标识码：A文章编号：1005-8249(2010)04-0009-04 (Department of road and rail way engineering Tongji university shanghai 201804 China) Abstract:According to the elastic layered theory applying the large general -purpooe finite element analysis software Abaqus using infi- nite element to simulate the boundary conditiong this paper establishes two -dimensional model of asphalt pevement and caleulates its dynamic re- sponse to the FWD loads.The resilient modulus damping and other parameters of pavement materials are discussed and the effect for dynamic re- sponse of pavement structure caused by changes of the sensitive parameter soil base modulus is analyzed.As a result the basis for understanding re- sponse of asphalt pavement due to dynamic loading is provided. Key words Falling Weight Deflectometer;infinite element;damping;soil base modulus;dynamic response 与我国现行路面设计规范中采用的静力分析方法了土基模量对动力响应的影响. 不同，实际路面结构承受着车辆荷载的动力作用.这 种动荷载除了有瞬时性外，还会因路面不平整对路面 1FWD动荷载特性 结构产生冲击作用，并在车辆制动时会产生较大的水 FWD是一种高精度的弯沉测量设备.通过FWD 平力.在动荷载作用下路面结构会将呈现出不同于静 弯沉检测，一般可记录落锤点最大弯沉、以落锤点为中 力作用下的工作特性和响应规律.近年来，国内展开 心的弯沉盆曲线、...
FWD荷载作用下沥青路面动力响应有限元分析.pdf
