中文核心期刊
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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2008, Vol. 27 ›› Issue (3): 400-404.

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缺陷水泥混凝土路面裂缝扩展机理研究

吴国雄1, 王晨1, 向阳开1, 佘汉聪2   

  1. 1. 重庆交通大学 土木建筑学院, 重庆 400074;
    2. 广东汕头路桥工程公司, 广州 汕头 515000
  • 收稿日期:2007-07-09 修回日期:2007-09-03 出版日期:2008-06-20 发布日期:2016-11-14
  • 作者简介:吴国雄(1966-),男,湖北崇阳人,教授,博士生导师,主要从事道路工程教学与科研工作。Tel:023-62652320。
  • 基金资助:
    教育部重点科技项目(04117)

Research on Mechanism of Crack Expanding of Blemish Cement Concrete Pavement

WU Guo-xiong1, WANG Chen1, XIANG Yang-kai1, SHE Han-cong2   

  1. 1. School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing 400074, China;
    2. Shantou Company of Highway & Bridge, Guangdong Shantou 515000, China
  • Received:2007-07-09 Revised:2007-09-03 Online:2008-06-20 Published:2016-11-14

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摘要： 研究表明,水泥混凝土路面在凝固收缩过程中形成板底早期裂缝,产生缺陷。为此,采用了断裂力学的基本原理,通过计算得出路面板底裂缝深度、荷载大小和应力强度因子之间的关系,分析了路面裂缝扩展的条件。同时,利用疲劳方程建立了荷载作用次数与稳定断裂韧度下降之间的关系式,由此说明疲劳荷载作用下产生的累计损伤导致的稳定断裂韧度下降是路面开裂破坏的根本原因。

关键词: 水泥混凝土路面, 早期裂缝, 应力强度因子, 荷载作用次数, 稳定断裂韧度

Abstract: It is reported that cement concrete pavement occurs inchoate cracks at concrete slab bottom while shrinking,which is a defect.According to this,the basic principle of fracture mechanics is used and the relationship among crack depth at concrete slab bottom,loading,and stress strength factor is got by calculating.And then the expansion condition of pavement's crack is analyzed.Besides,fatigue equation is used to establish the relationship between load repetition and stable fracture tenacity descent,which explains that the basic cause of concrete pavement crack failure is that accumulation total damage resulting from fatigue loads leads to stable fracture tenacity descent.

Key words: cement concrete pavement, inchoate crack, stress strength factor, load repetition, stable fracture tenacity

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