钢纤维混凝土桥面铺装层的细观应力破坏分析  

Micro-stress failure analysis of bridge pavement of steel fiber

作　　者：刘永光[1] 曾庆敦[2] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]华南理工大学交通学院,广州510640

出　　处：《东南大学学报（自然科学版）》2006年第5期799-804,共6页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(10372032);广东省自然科学基金资助项目(031394)

摘　　要：基于复合材料力学和线弹性断裂力学,简化了桥面铺装层及桥面板体系的力学模型,建立了修正的剪滞控制方程组.将模型裂缝区及远场的应力、位移条件合理转换为所建立计算模式的求解边界条件,进而得到了桥面铺装层和桥面板各子层的位移分布函数.运用能量法则,考虑温度效应对桥面铺装层的影响,得到了桥面铺装层破坏应力的解析解.运用该计算模式对某桥桥面铺装层的破坏进行了仿真分析,证实了该方法的适用性.Based on the knowledge of composite mechanics and linear elastic fracture mechanics, the mechanical model of bridge pavement and bridge deck is simplified. Furthermore, the modified shear-lag governing equations are built. The stress and displacement conditions in crack zone and far field of the model are taken as boundary conditions to solve the calculation model. Then displacement distribution functions of bridge pavement and bridge deck are obtained. The energy principle is used to obtain the analytical solution of the failure stress including the influence of temperature. The validity of the calculation model is verified through the simulation analysis of a certain bridge pavement.

关 键 词：钢纤维混凝土 桥面铺装 破坏分析 应变能释放率 温度应力 剪滞理论 

分 类 号：U443.33[建筑科学—桥梁与隧道工程] O346.1[交通运输工程—道路与铁道工程]