Sampave层模量对沥青加铺层结构内力影响分析  

Analysis of Impact of Sampave Module on Stress of Asphalt Concrete Overlay

作　　者：杨旭东[1] 邢明亮[1] 程毅 陈拴发[1] 李祖仲[1] 廖卫东 

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,西安710064 [2]辽宁省高速公路建设局,沈阳110508 [3]湖北汉宜高速公路沥青加铺工程指挥部,武汉430051

出　　处：《武汉理工大学学报》2009年第9期8-12,共5页Journal of Wuhan University of Technology

基　　金：国家西部交通建设科技项目(200631800005)

摘　　要：为了研究应力吸收层模量变化对沥青加铺层结构内力的影响,探求应力吸收层合理的模量范围,采用三维有限元数值分析方法,建立基于Sampave应力吸收层的沥青加铺结构三维有限元模型,分析其模量变化对沥青加铺层结构荷载应力和温度应力分布的影响。结果表明:低模量的Sampave应力吸收层能有效地降低加铺层层底的荷载应力和温度应力,改善整个沥青面层结构的应力状态,延缓反射裂缝在加铺层中形成,显示其在抗反射裂缝方面的独特作用。但应力吸收层混合料模量不宜太大,在常温下,Sampave应力吸收层混合料模量在400—600 MPa较为合理。In order to study the impact of Sampave module on stress of asphalt concrete overlay and probe into its reasonable scope of module, a 3D finite element model of asphalt concrete overlay on Sampave is established to analyze the effects of Sampave Module on the load stress and thermal stress of asphalt overlay. Calculating results indicate that Sampave with low module may decrease load stress and thermal stress at the bottom of overlay, improve the stress distribution in the whole asphalt overlay, and delay reflective cracking. Therefore Sampave takes an excellent role in delaying and preventing reflective cracks. However it is reasonable that Sampave module is about 400--600 MPa under the normal temperature and high module is unfit for Sampave mixture.

关 键 词：道路工程 反射裂缝 SAMPAVE 应力吸收层 模量 三维有限元 

分 类 号：U418.8[交通运输工程—道路与铁道工程]