非对称支座布置宽幅箱梁受力特性研究  

Research on Force Characteristic of Wide Box Girder with Asymmetric Bearing Arrangement

作　　者：刘威 付继东 张森奇 LIU Wei;FU Jidong;ZHANG Senqi(Suqian East Hub Construction and Development Co.,Ltd.,Suqian 223800,Jiangsu,China;Tongji University,Shanghai 200092,China)

机构地区：[1]宿迁东枢纽建设发展有限公司,江苏宿迁223800 [2]同济大学,上海200092

出　　处：《工程技术研究》2025年第3期13-16,共4页Engineering and Technological Research

摘　　要：宽幅桥梁下部空间要求、交通组织等因素可能导致难以对称布置支座,需要非对称布置支座。因此,文章采用实用精细化折面梁格模型,对非对称支座布置宽幅箱梁的受力特性进行计算和分析。结果表明,非对称支座布置的宽幅箱梁在受力上仍以纵向受弯为主,但结构受力呈现一定的非对称特性,在支点位置附近较为显著;支点处截面横向受力较为不利,在设计中建议设置横隔板,必要时布置横向预应力钢束。Factors such as lower space requirements,traffic organization of wide bridges may lead to the difficulty in symmetrical arrangement of bearings,and asymmetric arrangement of bearings is required.Therefore,this paper uses the practical refined folded grillage model to calculate and analyze the force characteristics of the wide box girder with asymmetric bearing arrangement.The results show that the wide box girder with asymmetric bearing arrangement is still mainly subjected to longitudinal bending,but the structural force shows a certain asymmetric characteristics,which is more significant near the fulcrum position;the lateral force of the cross section at the fulcrum is unfavorable,and it is recommended to set the intermediate diaphragm in the design,and to arrange the transverse prestressed tendons if necessary.

关 键 词：非对称支座布置 宽幅箱梁 有限元分析 折面梁格 

分 类 号：U441[建筑科学—桥梁与隧道工程]