同济大学学报（自然科学版）2012，Vol.40Issue(6)：849-853,5.DOI:10.3969/j.issn.0253-374x.2012.06.008
沥青路面结构层弯拉应力与应变的近似计算
Approximate Calculation of Flexural Stresses and Tensile Strains in Asphalt Pavements
摘要
Abstract
The flexural stresses and tensile strains in asphalt pavement layers were studied. The hood face coefficient was proposed to characterize the influences of vertical compression stresses and shear stresses on the flexural stresses and tensile strains; the neutral axis moving coefficient was introduced to describe the differences between smooth contact and full friction contact in layers; the flexure torque distribution coefficient was put forward to show the influences of different bend curvature on asphalt layer and base. As to asphalt pavement with nonuniform modulus, the surface equivalent modulus was deduced by bending rigidity equivalent principle, and then the errors of the approximate calculation methods for the tensile strains at the bottom of surface and the flexural stresses at the bottom of base in asphalt pavement whit nonuniform modulus were discussed. Usually, the approximate calculation errors are less than 5%.关键词
路面工程/沥青路面/结构疲劳/弯拉应力和应变Key words
pavement engineering/ asphalt pavements structure fatigue/ flexural stresses and tensile strains分类
交通工程引用本文复制引用
吁新华,谈至明..沥青路面结构层弯拉应力与应变的近似计算[J].同济大学学报（自然科学版）,2012,40(6):849-853,5.基金项目
交通部西部交通建设科技项目(200831800099) （200831800099）
