基于能量法的波形钢腹板箱梁腹板剪力分配  

Calculation theory of shear stress distribution in box girder with corrugated steel webs based on energy method

作　　者：徐海波 Xu Haibo(Hubei Jiaotou Jingchu Construction Management Co.,Ltd.,Jingzhou Hubei 434100,China)

机构地区：[1]湖北交投荆楚建设管理有限公司,湖北荆州434100

出　　处：《山西建筑》2024年第11期143-147,共5页Shanxi Architecture

摘　　要：在波形钢腹板桥梁的抗剪设计中,腹板的剪应力分配是比较关键的问题。为了解决波形钢腹板剪应力分配的计算问题,提出了一种基于能量法的波形钢腹板剪应力分配计算方法。该方法以能量法为基本原理,通过外力功等于桥梁纵向应变能与横向应变能之和这一基本思想,计算出每道腹板分担剪力的比例,并以剪力分配系数表征各腹板的剪力分配比例。最后,应用该方法计算了一单箱六室波形钢腹板箱梁桥的剪应力分配系数,同时,建立该桥的有限元模型,并将有限元计算结果与能量法结果进行对比,分析能量法计算出的各块腹板剪力分配系数的准确性。算例分析结果表明,该方法能较准确地对多个波形钢腹板之间的剪力分配进行分析,可为该类型桥梁的抗剪设计提供依据。In the shear design of corrugated steel web bridges,the shear stress distribution in the web is a more critical issue.In order to solve the calculation problem of shear stress distribution in corrugated steel webs,an energy-based method of calculating shear stress distribution in corrugated steel webs was proposed.This method uses the energy method as the basic principle,and through the basic idea that the external work is equal to the sum of the longitudinal strain energy and the transverse strain energy of the bridge,the proportion of shear force shared by each web is calculated,and the shear force distribution coefficient characterizes the proportion of shear force shared by each web.The method is applied to calculate the shear stress distribution coefficients of a single-box six-cell corrugated steel web box girder bridge,and a finite element model of the bridge was established,and the finite element calculation results were compared with the results of the energy method to analyze the accuracy of the shear force distribution coefficients of each web calculated by the energy method.The analysis results show that the method can analyze the shear force distribution between multiple corrugated steel webs more accurately and can provide a basis for the shear design of this type of bridge.

关 键 词：波形钢腹板 能量法 剪力分配 有限元分析 

分 类 号：TU997[建筑科学—市政工程]