单箱多室组合折腹箱梁偏载系数研究  

Study on Eccentric Load Coefficient of Single-box Multi-cell Composite Girder with Corrugated Webs

作　　者：谭超 徐骁青[2] 李文武 贺耀北 TAN Chao;XU Xiaoqing;LI Wenwu;HE Yaobei(Hunan Provincial Communications Planning,Survey&Design Institude Co.,Ltd.,Changsha,Hunan 410200,China;College of Civil Engineering,Tongji University,Shanghai,200092,China)

机构地区：[1]湖南省交通规划勘察设计院有限公司,湖南长沙410200 [2]同济大学土木工程学院,上海200092

出　　处：《公路工程》2023年第1期8-13,共6页Highway Engineering

基　　金：国家自然科学基金青年基金项目(51808069);湖南省科技重大专项基金项目(2017SK1010);湖南省创新创业团队支持计划基金项目(湖南交通设计院高性能材料创新创业团队)。

摘　　要：组合折腹箱梁是一种新型的钢-混组合结构,具有良好的技术经济效益和社会效益,正广泛应用于国内桥梁工程中。采用有限元法参数分析了单箱多室组合折腹箱梁偏心荷载作用下的结构性能,结果表明:组合折腹箱梁偏心荷载产生的空间效应较普通混凝土箱梁更为显著;偏载系数随宽跨比的增加而增加,随跨高比的增加而减小;设置一道中横隔板能有效降低偏载效应;应在跨中设置内隔板,以减少偏心荷载效应。Composite box girder with corrugated steel webs is a new type of steel-concrete composite structure,which has excellent technical,economic and social benefits.It is widely used in domestic bridge engineering.The structural performance of single-box multi-cell composite box girder with corrugated steel webs under eccentric load is analyzed by parametric finite element method.The results show that the spatial effect of composite box girder under eccentric load is more obvious than that of ordinary concrete box girder.The eccentric load coefficient increases with the increase of width-span ratio and decreases with the increase of span-depth ratio;setting a middle diaphragm can effectively reduce the partial load effect.In addition to end beams,an inner diaphragm should be set in midspan to reduce eccentric load effect.

关 键 词：组合结构桥梁 折形钢腹板 偏载系数 有限元法 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]