钢-混组合梁桥荷载横向分布系数的影响参数分析  

Analysis of the influencing parameters of the load transverse distribution of steel-concrete composite beam bridges

作　　者：张泽军 沈传东 刘丞 朱经纬 ZHANG Zejun;SHEN Chuandong;LIU Cheng;ZHU Jingwei(Innovation Research Institute,Shandong Hi-Speed Group Co.,Ltd.,Jinan 250014,China;Shandong Key Laboratory of Highway Technology and Safety Assessment,Jinan 250014,China;The Third Construction Engineering Co.,Ltd.of China Construction Second Engineering Bureau,Beijing 100070,China;Shandong Institute for Product Quality Inspection,Jinan 250102,China;College of Transportation Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东高速集团有限公司创新研究院,山东济南250014 [2]山东省高速公路技术和安全评估重点实验室,山东济南250014 [3]中建二局第三建筑工程有限公司,北京100070 [4]山东省产品质量检验研究院,山东济南250102 [5]山东建筑大学交通工程学院,山东济南250101

出　　处：《山东建筑大学学报》2024年第4期16-24,共9页Journal of Shandong Jianzhu University

基　　金：山东省交通运输厅项目(2018B49,2022B64)。

摘　　要：荷载横向分布系数的准确性直接关系到多主梁钢-混组合梁桥设计的技术经济性。文章利用有限元软件计算了钢-混凝土组合梁桥的应变及挠度,通过分析组合梁抗弯刚度,分析了荷载横向分布系数的主要影响参数,获取了护栏、曲率、横梁、横坡和桥面连续层等对组合梁荷载横向分布系数的影响规律。结果表明:护栏和桥面连续层对组合梁的荷载横向分布系数影响较大,尤其是边梁,荷载横向分布系数变化可约达20%,当计入护栏影响时,桥面连续层对边梁应变分布的影响减小,而对内梁应变分布的影响增大;当曲率<1/20、横坡<4%、无横梁时,3类参数对组合梁的荷载横向分布系数影响较小。设计时保守考虑,通常忽略护栏和桥面连续层对组合梁刚度和荷载横向分布系数的影响,针对文章所提参数的影响范围,在组合梁设计时可予以参考。The accuracy of the load transverse distribution coefficient is directly related to the technical and economic viability of steel-concrete composite beam bridge designs with multiple main beams.The strain and deflection of steel-concrete composite beam bridge are calculated by finite element software in this study.By analyzing the flexural stiffness of the composite beam,the main influencing parameters of the load transverse distribution coefficients are defined,and the influence of guardrail,curvature,cross beam,transverse slope and continuous layer of bridge deck on the load transverse distribution coefficient of the composite beam are obtained.The results show that the guardrail and continuous layer of bridge deck have a great influence on the load transverse distribution coefficient of composite beam,particularly for exterior beams,which can reach approximately 20%.Including guardrail effects shows that the continuous layer of bridge deck reduces its influence on the strain distribution of exterior beams while increasing it on interior beams.When the curvature is less than 1/20,and the transverse slope is under 4%and no cross beams,the influence of the three parameters on the load transverse distribution coefficient of composite beams is small.Typically,the influence of guardrail and continuous layer of bridge deck on stiffness and load transverse distribution coefficient of composite beams usually ignores with conservative consideration in design.With the influence range of parameters proposed in this study,the design of composite beams can be designed to enhance precision.

关 键 词：钢-混组合梁桥 荷载横向分布系数 护栏 桥面连续层 抗弯刚度 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]