永久性沥青路面试验路力学响应分布的数值仿真  

Numerical Simulation of Mechanical Response of Perpetual Road Test Asphalt Pavement

作　　者：韦金城[1,2] 王林 杨永顺[3] 马士杰 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]高速公路养护技术交通行业重点实验室,山东济南250031 [3]山东省交通厅公路局,山东济南250002

出　　处：《公路交通科技》2010年第6期15-19,33,共6页Journal of Highway and Transportation Research and Development

基　　金：交通部联合攻关项目(2005353341200)

摘　　要：为解决重载交通和复杂环境条件耦合作用下路面结构力学响应计算与实际不符的技术难题,采用永久性沥青路面试验路实测交通荷载、路面结构温度场和力学响应数据,分别构建轴载、路面温度场参数概率分布函数和基于轴载、温度变量的沥青层底最大应变力学响应回归模型。在此基础上,用计算机编程语言基于蒙特卡罗模拟法设计出参数抽样和沥青路面力学响应概率分布程序,建立了针对轴载、温度场参数离散型分布和正态分布特点的随机变量抽样方法,实现了参数输入和基于全年交通组成与温度变化周期的沥青路面力学响应分布的模拟仿真。结果表明,模拟的力学响应分布与工程实测结果一致,均近似服从正态分布。研究证明了通过蒙特卡罗模拟可揭示路面结构在荷载和温度耦合作用下的力学响应规律。In order to solve the technical problem that calculated pavement structural mechanical responses were not conformity with actual response under complicated load,temperature coupling influence,the data of traffic loads,pavement temperature and mechanical responses collected from a perpetual pavement test road were used to build the axle load and temperature probability functions and regression models of maximum strain of asphalt layer bottom based on axle load and temperature variable.Based on these works,probability distribution programs for parameter sample and pavement response were designed based on Monte Carlo simulation by computer program language.The random sampling methods of discrete probability distribution function and normal probability distribution function for axle load and temperature field were built,the numerical simulation of parameter input and mechanical response distribution based on annual traffic volume and temperature cycle was realized.The results show that simulated mechanical response is in conformity with actual response and they all follow normal distribution approximately.The research proves that Monte Carlo method can help to discover pavement mechanical response under load and temperature coupling influence.

关 键 词：道路工程 永久性沥青路面 蒙特卡罗模拟 力学响应 轴载谱 温度场 

分 类 号：U416.217[交通运输工程—道路与铁道工程]