Abstract: The paper tries to couple damage theory with 3D FEM (i.e.Damage FEM),and applies it to analysis of holistic structure damage,defines a new degree of damage with strain as the variable of damage. On the basis of that, the paper modifies the equation of J.Mazars and bulids a new damage equqtion,in turn forms a verification method and applies the method to analyse the mechanism of box-culvert cracks formation in Shabin Road in Chongqing.The practice proved the feasibility of the method which is sig

Key words: box-culvert, crack formation, degree of damage, Damage FEM, damage field

摘要： 笔者尝试实现损伤理论有限元的结合(损伤有限元)，并运用于对整体结构的损伤进行分析衡量.为此，以应 变为损伤变量定义了新的内变量-损伤度，并在此基础上修正了J.Mazars的本构方程建立新的损伤本构方程.进 而形成一种用于结构整体的强度校核方法.将这一方法运用于重庆市沙滨路排污管道试验段砼箱涵的裂缝形成的 损伤机理分析和强度校核，实践证明是可行的.本方法的发展对损伤力学运用于工程实际具有重要意义

关键词: 箱涵, 裂缝形成, 损伤度, 损伤有限元, 损伤场