考虑腹板剪切行为的波形钢腹板梁理论模型  

Theory Model of Corrugated Steel Web Girder Considering Web Shear Behavior

作　　者：聂建国[1] 李法雄[2] 

机构地区：[1]清华大学土木工程系,北京100084 [2]交通运输部公路科学研究院,北京100088

出　　处：《中国公路学报》2011年第6期40-48,共9页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(50438020);教育部长江学者和创新团队发展计划项目(IRT00736)

摘　　要：为研究波形钢腹板剪切变形对波形钢腹板梁受力行为的影响,引入腹板剪切变形转角函数,将波形钢腹板梁的弯曲行为分解为桁架作用和弯曲作用,建立一个能够考虑波形钢腹板剪切变形的波形钢腹板梁理论模型。推导了端部无约束条件下简支波形钢腹板梁在均布荷载和端部约束条件下简支波形钢腹板梁在跨中集中荷载作用下的解析解,采用有限元方法验证了理论模型和解析解的正确性和适用性。研究结果表明:端部约束条件对主梁变形影响很小;波形钢腹板的剪切变形对主梁变形影响显著,在常见波形钢腹板梁桥尺寸范围内,由腹板剪切变形引起的主梁挠度占总挠度的10%～30%。In order to study the influence of shear deformation of forcing behavior for corrugated steel web,shear rotation function of calculating shear deformation in the web was introduced,a theory model of corrugated steel web girder was presented.In the model,bending behavior of corrugated steel web girder could be divided into truss action and bending action between upper-flange and sub-flange.Then,analytical solutions for the cases of simply-supported corrugated steel web girder without end restraint sustaining under uniform distribution load and simply-supported corrugated steel web girder with end restraint under sustaining mid-span concentrated load were derived,validity and usability of the analytical solution and the model were well proved by finite element method.Results show that the end constraint conditions have little effect on the deformation of the main girder.However,the shear deformation of corrugated steel web has great impact on the deformation of main girder.In the common size ranges of bridge with corrugated steel web girders,the proportion of main girder deflection caused by shear deformation in the web may reach 10% to 30% of total deflection.

关 键 词：桥梁工程 波形钢腹板梁 理论模型 剪切变形 弯曲行为 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]