【作者】 龙佩恒； 朱雪光； 杨建国； 卢刚；

【Author】 LONG Pei-heng~1,ZHU Xue-guang~1,YANG Jian-guo~2,LU Gang~2 (1.School of civil and transportation engineering,Beijing university of Civil Engineering and Architecture,Beijing 100044,China; 2.Beijing Guodaotong Highway Design and Research Institute CO.LTD,Beijing 100053,China)

【机构】 北京建筑工程学院土木与交通工程学院； 北京国道通公路设计研究院股份有限公司；

【摘要】 以梅市口拱桥为背景工程,分析研究了大跨中承式钢拱桥的拱梁连接方式、吊杆初张拉力及非对称拱脚布置对吊杆受力性能的影响,分析结果表明:拱梁连接方式的不同对边吊杆受力影响最大、次边吊杆次之、其它吊杆影响较小。增加吊杆初张拉力可有效减小边吊杆受力,但对拱肋和主梁受力不利。拱脚非对称布置对拱脚较低一侧的吊杆、主梁以及拱肋受力影响较大。因此,建议设计中应优化不同吊杆张拉力,施工阶段对边吊杆和部分应力较大的吊杆实施二次张拉,以改善桥梁整体受力性能。更多还原

【Abstract】 In this paper,Meishikou steel arch bridge was taken as the engineering background,we study the mechanical characteristics of the suspender by analyzing and comparing the mode of beam-arch connection of the long-span half-through steel arch bridge,the asymmetric structure of arch-spring and initial tension.The analysis results show that:the different mode of beam-arch connection has a great impact on the stress of the marginal suspenders,secondary suspenders times,the rest of the suspenders was very small;increase the initial tension can effectively reduce the stress of the suspenders,but it is adverse to the arch rib and the girder;For asymmetric structure of arch -spring,the low arch-spring which in one side of the bridge has a great stress on the girder,suspender and arch rib.Therefore we should be used with different tension to optimize the stress of the Suspenders in design,there has a suggestion that we should conduct re-tension to the marginal suspenders and part of the larger stress suspenders, and take effective measures to improve the performance of the bridge.更多还原