建筑钢结构进展2026，Vol.28Issue(5)：107-118,12.DOI:10.13969/j.jzgjgjz.20241030002
基于能量变分法的钢管混凝土桁式混合结构梁桥剪力滞效应研究
Study on Shear Lag Effect of Concrete-Filled Steel Tubular Truss Girder Bridge Based on Energy Variation Principle
摘要
Abstract
Compared with traditional steel-concrete composite beam bridges,concrete-filled steel tubular truss girder bridges offer advantages,including light weight,high bearing capacity,superior economic efficiency and short construction period,and are widely used in engineering.Different from solid-web bridges,the deck of concrete-filled steel tubular truss girder bridge operates under point-supported conditions,leading to a pronounced shear lag effect.Therefore,the shear lag effect is studied through theoretical analysis and finite element method in this study.Firstly,based on energy variation principle,the calculation formula of shear lag coefficient is derived.Then,a refined finite element model of concrete-filled steel tubular truss girder bridge is established,and the numerical results are compared with those obtained from the energy variation method,which verifies the accuracy of the proposed theoretical method.The distribution laws of shear lag effect of girder bridges along the transverse bridge direction,longitudinal bridge direction,and deck slab thickness direction are obtained,the influences of load types and load positions are revealed.It is proposed that the effect of shear lag should be considered in the calculation of the deck effective width of concrete-filled steel tubular truss girder bridges.关键词
钢管混凝土/桁架/剪力滞效应/能量变分原理/理论分析/剪力滞系数/精细化有限元模型Key words
concrete-filled steel tube/truss/shear lag effect/energy variation principle/theoretical analysis/shear lag coefficient/refined finite element model分类
交通工程引用本文复制引用
陈娟,冷夏萌,曹鹏贺,赵剑飞..基于能量变分法的钢管混凝土桁式混合结构梁桥剪力滞效应研究[J].建筑钢结构进展,2026,28(5):107-118,12.基金项目
国家自然科学基金(52078249),南京航空航天大学教育教学改革项目(2023JG0727Y,2024YJXG-E21,2024YJXGG-C12),南京航空航天大学研究生科研与实践创新计划项目(xcxjh20230727) （52078249）
