波形钢腹板组合桥梁夹层梁模型  

A Sandwich Beam Model for Composite Bridges with Corrugated Steel Webs

作　　者：陈夏春 白植舟[2] 姜瑞娟 区达光[5] 陈德伟[2] CHEN Xiachun;BAI Zhizhou;JIANG Ruijuan;Tatkwong Au;CHEN Dewei(WISE-TECH Engineering Consulting Co.,Ltd.,Shenzhen 518000,China;Department of Bridge Engineering,Tongji University,Shanghai 200092,China;Department of Civil Engineering,The University of Shandong,Jinan 250061,China;Shenzhen Municipal Engineering Design&Research Institute Co.,Ltd.,Shenzhen 518029,China;Department of Civil Engineering,The University of Hong Kong,Hong Kong,China)

机构地区：[1]深圳市尚智工程技术咨询有限公司,深圳518000 [2]同济大学桥梁工程系,上海200092 [3]山东大学土木工程系,济南50061 [4]深圳市市政设计研究院有限公司,深圳518029 [5]香港大学土木工程系,中国香港

出　　处：《结构工程师》2021年第1期32-42,共11页Structural Engineers

基　　金：国家自然科学基金资助项目(51878391、51578323);香港研究资助局项目(710111)。

摘　　要：为研究波形钢腹板组合桥梁的弯曲与剪切性能,考虑混凝土顶底板的局部弯曲,及该局部弯曲与波形钢腹板剪切变形的耦合作用,建立了一个夹层梁理论模型。该模型同时考虑横隔板的作用。基于提出的夹层梁模型,进一步提出了一种有限元梁单元,以方便进行实际工程设计计算。采用试验的方法验证了建立的夹层梁理论模型的可靠性。研究结果表明:整体上应变沿截面高度线性分布的假设是适用的,但是在集中力与横隔板附近局部区域该假设不成立。在这些局部区域,由于顶底板局部弯曲与波形钢腹板剪切变形的耦合作用以及横隔板作用,混凝土顶底板会出现正应力与剪应力集中,进而可能导致局部破坏,在设计时应引起注意。A sandwich beam theory model is proposed to investigate flexural and shear behaviours of composite bridges with corrugated steel webs,considering the effects of interaction between local bending of concrete flanges and shear deformation of corrugated steel webs.The effects of diaphragms are also addressed.To provide a tool for practical application to real bridges,the finite element model of beam based on the sandwich beam theory is formulated.The proposed beam theory was verified by tests.From this study,it is found that the assumption of linear distribution of strain over whole section depth is generally valid,but locally invalid especially in the vicinity of point loads and diaphragms.Due to the interaction between flange local bending and web shear deformation,there is significant normal and shear stress concentration in the vicinity of point loads and diaphragms,which may cause local failure of concrete flanges and should be examined carefully in design.

关 键 词：波形钢腹板 组合桥梁 弯曲性能 夹层梁模型 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]