摘要
为研究中小跨度钢混组合梁不同截面形式的受力性能以及经济性,以香海大桥组合梁为背景,建立工字钢-混凝土组合梁桥、钢箱-混凝土组合梁桥、钢桁架-混凝土组合梁桥等模型,分析不同跨径下三种不同截面形式的钢混组合梁桥受力性能及用钢量。结果表明,活载作用下,工字钢组合梁跨中竖向位移均大于钢箱梁及钢桁架组合梁,且随着跨径的增大,工字钢组合梁跨中竖向位移增长幅度越来越明显;偏载作用下,钢箱组合梁跨中最大位移均小于工字钢及钢桁架组合梁,且随着跨径的增大,钢箱组合梁跨中最大位移与其他两种方案的位移差逐渐增大;跨径35~55m范围内,工字钢组合梁的截面用钢量最低;跨径55~70m范围内,钢箱组合梁截面用钢量最低;70~100m跨径范围内,钢桁架组合梁的截面用钢量最低。
In order to studythe stressand economicpropertiesof different steel-concrete composite girders for small and medium-spanbridges,taking the specific engineering example of Xianghai Bridge as the research background,and on its basis,taking the three bridge types of I-concrete composite girder bridge,steel box-concrete composite girder bridge,and steel truss-concrete composite girder bridge as the comparison objects,a comparative analysis on the force characteristics and economy of the structure after the three different steel-concrete composite girder bridges under different spans have been conducted.The results have shown that,underlive load,vertical displacement ofI-concrete composite girderislarger thanthat of steel box-concrete composite girderandsteel truss-concrete composite girder,andwill become largerfollowing the increase ofspan.Under bias load,vertical displacement ofsteel box-concrete composite girder is smaller than that ofI-concrete composite girder and steel truss-concrete composite girder,andthe difference willbecomelarger following the increase of span.Whenspaniswithin 35~55m,I-concrete composite girderneedsminimum steel;when span is within 55~70m,steel box-concrete composite girderneeds minimum steel;whenspan is within 70~100m,steel truss-concrete composite girder needs minimum steel.
作者
严春明
郭一凡
YAN Chunming;GUO Yifan(Poly Changda Engineering Co.,Ltd.,Guangzhou Guangdong 511431,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《广东公路交通》
2023年第4期37-41,共5页
Guangdong Highway Communications
关键词
钢混组合梁桥
受力性能
装配式
经济性
steel-concrete composite girder bridge
force performance
prefabricated
economy
