考虑湿接缝刚度损伤的桥梁荷载横向分布计算方法

摘要

在外界环境和养护不足影响下,在役的桥梁往往会出现横向连接结构的损伤.为了研究在役多梁式桥梁的荷载横向分布系数,在传统刚接梁法的基础上,考虑湿接缝刚度损伤导致的梁间剪力和弯矩传递的折减效应,根据力法原理建立正则方程并简化,推导出考虑湿接缝刚度损伤的修正刚接梁法.应用ANSYS有限元软件进行实体仿真分析并与本文方法计算结果进行了对比.结果表明,湿接缝刚度损伤对在役桥梁荷载横向分布系数有影响,本文方法计算得到的荷载横向分布系数更接近实际情况.%Under the influence of the external environment and the lack of conservation,the bridge in service tends to be damaged in the transverse connection structure.In order to study the transverse distribution coeff icient of the multi-beam composite bridge in service,on the basis of traditional rigid beam method,the reduction effects of bending moment and shear force caused by the damage of wet joint stiffness were considered.According to the principle of force method,the regular equation was established and simplif ied,and the modif ied rigid beam method considering the damage of wet joint stiffness was deduced.The solid simulation analysis was carried out by using the f inite element software ANSYS,and the results were compared with the results calculated by this method.The results show that the damage of wet joint stiffness has an effect on the transverse distribution coeff icient of the bridge in service. The transverse distribution coeff icient calculated by this method is closer to the actual bridge in effect.