往复荷载作用后锈蚀钢筋混凝土梁承载力数值模拟  

Numerical Simulation of Load Bearing Capacity of Corroded Reinforced Concrete Beam after Cyclic Loading

作　　者：杨晓明[1] 陈永林[1] 李富斋 白真宙 

机构地区：[1]辽宁工程技术大学建筑工程学院 [2]中国人民解放军95937部队

出　　处：《公路交通科技》2015年第5期81-87,94,共8页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51008148);辽宁省教育厅杰出青年学者成长计划项目(LJQ2013037)

摘　　要：采用ABAQUS有限元软件对锈蚀钢筋混凝土梁在经历若干次疲劳荷载作用后的静载承载力进行数值模拟分析。通过修改钢筋截面面积、屈服强度和极限强度等参数来模拟钢筋锈蚀及往复荷载的影响。分别对不同锈蚀率不同循环次数往复荷载作用后的钢筋混凝土梁进行静力非线性分析,得出以下结论:往复荷载作用后锈蚀钢筋混凝土梁的屈服荷载随钢筋锈蚀率及往复荷载循环次数的增加基本线性下降,二者对屈服荷载影响程度比较接近;钢筋混凝土梁的极限挠度随钢筋锈蚀率的增加非线性增大,随往复荷载循环次数的增加基本线性增大,但锈蚀率的影响要高于往复荷载循环次数的影响,特别是当循环次数较大时,此现象更加明显。The numerical simulation analysis on static load bearing capacity of corroded reinforced concrete beam after several times of fatigue load is carried out by ABAQUS software. The parameters such as section area, yield strength and ultimate reinforcement corrosion and cyclic different corrosion rates and cycle that （ 1 ） the yield load of corroded strength of the steel bars are modified to simulate the influence of loading, Non-linear static analysis on the reinforced concrete beam with numbers after cyclic loading are carried out respectively. It is concluded reinforced concrete beam after cyclic loading descends almost linearly with the increases of corrosion rate and number of cyclic loading , and the influence extents of two factors to yield load are similar; （2） the ultimate deflection of the reinforced concrete beam increases nonlinearly with the increase of the corrosion rate, and increases almost linearly with the increase of the number of cyclic loading, while the influence of corrosion rate is larger than that of the number of cyclic loading, especially it is more obvious when the number of cyclic loading is higher.

关 键 词：桥梁工程 承载力 数值模拟 锈蚀 往复荷载 

分 类 号：U445.471[建筑科学—桥梁与隧道工程]