摘要
对索拱组合结构进行了受力性能理论分析,以我国已建成的主跨为400 m的一座斜拉拱组合桥梁为例,运用平面杆系分析系统,与普通拱桥对比了在恒载作用下斜拉拱组合桥的内力、挠度计算结果以及承载能力极限荷载组合下的内力包络图结果.分析结果表明:与普通拱桥相比,合理的设计斜拉拱组合桥中斜拉索的参数,能够一定程度地降低整个拱肋的轴力,减小拱脚的负弯矩和剪力.由此得到结论:斜拉拱组合桥不仅桥型新颖美观,更重要的是拱肋轴力可调,该拱桥桥型可以向大跨度方向发展.
The paper has conducted the fundamental research on the cable-arch system. Taking a cablestayed arch bridge with main span of 400 m as an example, using the plane link analysis system, the internal force and deflection of the cable-stayed arch bridge under dead load has been contrasted with the result of the ordinary arch bridge. The internal force envelope diagram of the cable-stayed arch bridge under bearing capacity limit load combination has been contrasted the result with the ordinary arched bridge. The result indicated that reasonably designing of the cable in the cable-stayed arch bridge can reduce the axile force of the entire arch and obviously reduce the hogging moment and the shearing force the skew back. A conclusion is given that the cable-stayed arch bridge is novel and artistic. It is more important that the arch axile force of the cable-stayed arch bridge may adjust, thus, the bridge may develop to the great span direction.
出处
《湘潭大学自然科学学报》
CAS
CSCD
北大核心
2009年第3期123-127,共5页
Natural Science Journal of Xiangtan University
关键词
拱桥
斜拉桥
斜拉拱组合桥
结构分析
arch bridge
cable-stayed bridge
cable-stayed arch bridge
structural analysis
