斜拉拱组合桥静力性能及参数分析

以我国已建成的主跨为400米的世界第一座斜拉拱组合桥梁——湘潭市湘江四大桥为例，运用平面杆系分析系统，与普通拱桥对比了在恒载作用下的内力、挠度计算结果，分析了主要参数对斜拉拱组合桥受力的影响．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，能够降低整个拱肋的轴力，明显减小拱脚的负弯矩和剪力．因此斜拉拱组合桥不仅造型新颖美观，更重要的是拱肋轴力可调，该拱桥桥型有利于向大跨度方向发展．

Static behaviors and parameter analysis of cable-stayed arch bridge

Taking a cable-stayed arch bridge with main span of 400 m——the Xiangtan Xiangjiang 4th bridge as an example, the internal force and deflection of the cable-stayed arch bridge under dead load was compared with those of the ordinary arch bridge using the plane link analysis system. The internal force influence was analyzed with the main parameter to the cable-stayed arch bridge. The results indicated that the reasonable designing of the cable in the cable-stayed arch bridge could reduce the axile force of the entire arch, and obviously reduce the skew back of the hogging moment and the shearing force. A conclusion was given that the cable-stayed arch bridge, which the arch axile force of the cable-stayed arch bridge could be adjusted, is novel and artistic to be developed as a great span direction.