考虑剪切变形时波形钢腹板参数对连续刚构桥成桥线型的影响  

Influence of corrugated steel web parameters on the linetype of continuous rigid frame bridges considering shear deformation

作　　者：赵立财 ZHAO Li-cai(Department of Civil and Construction Engineering,Taiwan University of Science and Technology,Taipei 10607,China;China Railway 19th Bureau Group Third Engineering Co.,Ltd.,Shenyang 110136,China)

机构地区：[1]台湾科技大学营建工程系,中国台湾台北10607 [2]中铁十九局集团第三工程有限公司,辽宁沈阳110136

出　　处：《空间结构》2024年第4期69-74,共6页Spatial Structures

基　　金：辽宁省“兴辽英才计划”青年拔尖人才项目(XLYC2007146);中国铁建股份有限公司科技研究开发计划项目(2929-C20)。

摘　　要：波形钢腹板组合箱梁桥梁因具有自重轻、腹板无开裂、工程化制造等优点,已在我国实现广泛应用.但因波形钢腹板的波折效应,使其较同等跨度的混凝土桥梁具有更大的剪切变形.以一座在建的波形钢腹板连续刚构桥为依托工程,使用Midas/Civil有限元软件建立全桥模型,分析弹性模量、容重、波形钢腹板参数这3个变量对桥梁主梁线型与应力的影响,并对比分析剪切变形考虑与否对上述参数的影响程度.研究表明,剪切变形作用下波形钢腹板桥梁的线型位移与应力均有所增大;剪切变形对主梁线型位移的影响会随着波折角度的增加而减小;波形腹板参数变化对主梁线型位移与应力的影响较混凝土容重与弹模变化时更大;波形钢腹板剪切变形会对波形钢腹板连续刚构桥主梁的应力和强度产生不利影响.The composite box girder bridge with corrugated steel webs has been widely used in China because of its advantages such as light weight,no cracking of webs,and engineering manufacturing.However,due to the corrugation effect of corrugated steel webs,it has greater shear deformation than concrete bridges of the same span.Based on an under-construction continuous rigid frame bridge with corrugated steel webs,the Midas/Civil finite element software is used to establish a full-bridge model to analyze the influence of three variables,namely elastic modulus,unit weight,and corrugated steel web parameters,on the bridge girder alignment and stress,and to comparatively analyze the influence degree of considering shear deformation on the above parameters.The research shows that the linear displacement and stress of the corrugated steel web bridge increase under the action of shear deformation.The influence of shear deformation on the main girder linear displacement decreases with the increase of the corrugation angle.The influence of the change of corrugated web parameters on the main girder linear displacement and stress is greater than that when the concrete unit weight and elastic modulus change.The shear deformation of corrugated steel webs will have an adverse effect on the stress and strength of the main girder of the continuous rigid frame bridge with corrugated steel webs.

关 键 词：连续刚构桥 剪切变形 波形钢腹板 有限元分析 参数分析 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]