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破裂水泥混凝土路面板沥青加铺层温度应力影响因素
引用本文:陈拴发,郑木莲,杨斌,王秉纲.破裂水泥混凝土路面板沥青加铺层温度应力影响因素[J].交通运输工程学报,2005,5(3):25-30.
作者姓名:陈拴发  郑木莲  杨斌  王秉纲
作者单位:1. 同济大学,道路与交通工程教育部重点实验室,上海,200092;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. 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
基金项目:湖北省交通科技项目(2002-618)
摘    要:为了防止水泥混凝土路面加铺沥青面层反射裂缝的产生,采用有限元方法,视路面结构为弹性层状体系,建立沥青加铺层、补强层、破裂水泥混凝土路面板和地基组成的空间三维模型,分析了破裂板块平面尺寸、降温幅度、沥青加铺层模量及厚度、结构补强层模量、混凝土路面板厚度等因素对沥青加铺层温度应力的影响。结果表明,对破裂后的旧水泥混凝土路面板块,沥青加铺层温度应力随其板块尺寸的减小而大幅度降低,较大的降温幅度对加铺层温度应力的影响远大于车辆荷载产生的应力;而降低沥青加铺层模量,增大加铺层厚度等技术措施可明显改善破裂板接缝处的应力状况,并能有效地防止沥青加铺层反射裂缝的产生。

关 键 词:道路工程  路面  破裂水泥混凝土路面板  沥青加铺层  温度应力  三维有限元
文章编号:1671-1637(2005)03-0025-06
收稿时间:2005-03-13
修稿时间:2005年3月13日

Thermal stress influence factors of asphalt overlay on cement concrete pavement cracking slab
Chen Shuan-fa,Zheng Mu-lian,Yang Bin,Wang Bing-gang.Thermal stress influence factors of asphalt overlay on cement concrete pavement cracking slab[J].Journal of Traffic and Transportation Engineering,2005,5(3):25-30.
Authors:Chen Shuan-fa  Zheng Mu-lian  Yang Bin  Wang Bing-gang
Abstract:In order to remove the reflective crack of asphalt overlay on cement concrete pavement, the paper adopted finite element method, took pavement structure as elastic layered system, founded a three-dimensional model of asphalt overlay, strengthening layer, cracked slab of cement concrete pavement and subgrade, and analyzed the influences of old cement concrete cracked size, temperature drop scope, modulus and thickness of asphalt overlay, structure strengthening layer modulus and thickness of cement concrete cracked slab on asphalt overlay thermal stress. The results indicate that the thermal stress of asphalt overlay decreases greatly with the size reduction of old cement concrete cracked slab, the influence of great temperature drop scope on overlay thermal stress is much larger than that of vehicle load, the measures such as decreasing asphalt overlay modulus and increasing asphalt overlay thickness .etc can effectively improve the stress situation at cracked slab joints, and effectively prevent the reflective crack of asphalt overlay. 8 tabs, 7 figs, 8 refs.
Keywords:road engineering  pavement  cracked slab of cement concrete pavement  asphalt overlay  thermal stress  3-D finite element
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