交通运输工程学报020108

	交通运输工程学报 JOURNAL OF TRAFFIC AND TRANSPORTATION ENGINEERING 2002 Vol.2 No.1 P.38-42

用矩阵权函数分析基层底部混合型裂缝的应力强度因子

Analysis on the stress intensity factor(SIF) for mixed-mode crack atbottom base layer with weight functions expressed with matrix

罗睿　黄晓明　

摘　要：由于基层材料的变异性、基层干缩(尤其是水泥基基层)、温度应力、土基压实不够、施工和养护不当,以及混合型荷载等都会在基层形成混合型裂缝,这些裂缝很容易形成反射裂缝,因而分析基层混合型裂缝应力强度因子就非常有必要.根据能量准则、叠加原理、贝蒂互换定理等推导出用矩阵权函数计算混合型应力强度因子的方法.并分析了待定权函数系数的求法,即结合有限元计算混合型裂缝应力强度因子方法求出待定的权函数系数,继而得到了矩阵型权函数.并利用有限元检验得到的权函数,两种不同方法在不同荷载作用下的计算结果吻合得很好,表明该方法可行.并编制了相应的程序来实现上述理论,对研究反射裂缝扩展和工程应用非常有益.
关键词：权函数;矩阵;基层;应力强度因子;有限元
分类号：U416.1 　文献标识码：A
文章编号：1671-1637(2002)01-0038-05

作者简介：罗睿(1973-),男,四川南溪人,东南大学交通学院博士生,从事路面材料研究和路面结构计算。怂
作者单位：罗睿（东南大学,交通学院,江苏,南京,210096）　
　　　　　黄晓明（东南大学,交通学院,江苏,南京,210096）　

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收稿日期：2001年11月12日

出版日期：2002年3月1日