沥青路面显式功能函数的推导及其可靠度分析  

Derivation for Explicit Function of Asphalt Pavement Structure and Study on Structural Reliability

作　　者：宋云连[1] 张永强[1] 李翀鹏[1] 

机构地区：[1]内蒙古工业大学建筑工程学院,内蒙古呼和浩特010051

出　　处：《公路工程》2009年第1期1-4,9,共5页Highway Engineering

基　　金：留学回国人员科研启动基金(教外司留[2006]331);内蒙古自治区高等学校科学研究项目(NJZY08060)

摘　　要：把沥青路面结构上的交通参数(轴载Pi、作用次数ni、车道横向分布系数η、交通量年增长率γ)和结构参数(上层、基层、土基模量E1、E2、E0;上层、基层厚度H1、H2)处理成随机变量,应用Matlab软件和程序化分析方法,以路表弯沉为控制指标,建立了沥青路面结构显式表示的功能函数Z。根据该Z编写了路面结构可靠度计算程序,计算了沥青路面结构的可靠指标β,并分析了β对各类具有不同变异特性随机变量的敏感性,给出了β与各随机变量波动参数ti的关系曲线。算例结果表明,对β的影响最敏感的随机变量有Pi,影响次之的有H2、H1、E0、n、η、E2、E1。基于上述结果,在沥青路面结构可靠度研究时,给出了要重点考虑的随机变量。The traffic parameters （vehicle axis load Pi, vehicle action time hi, roadway landscape orientation coefficient η, rise ratio γ in traffic each year） and structure parameters （ elastic module E1 of surface, E2 of roadbase and E0 of soil; thickness H1 of surface and H2 of roadbase） are taken as random variable, and the deflection of pavement surface is taken as criteria index, so the explicit function Z of asphalt pavement structure is turned out by using Matlab soft and program design method. The program for calculating structural reliability of asphalt pavement is programmed based on above Z. The asphalt pavement structural reliability index β is calculated by using above program, and furthermore, the sensitivity degree from each random variable with different variation characteristic ti to β can also be analyzed, and the relation curve between ti and β is given. The calculating result according to example shows that the effect degree of random variable Pi to β is greatest, and H2 takes second place , and the subsequent important random variable is H1, E0, ni, η, E2, E1. Therefore the random variables, that have greatest effect to asphalt pavement structural reliability, should be considered in particular.

关 键 词：沥青路面 功能函数 结构可靠度 弯沉 敏感性 

分 类 号：U416.217[交通运输工程—道路与铁道工程]