【摘要】 为了掌握三塔斜拉-自锚式悬索组合结构的力学特点和计算方法,以汉中市西二环特大桥为例,进行了成桥状态计算方法研究,并结合实际工程中常用的结构参数对其进行力学性能影响分析。结果表明,该类结构在计算中非线性效应较突出;对于自锚式悬索体系部分,处理好悬索体系主缆矢跨比和背索在主梁上的锚固间距可优化副塔受力;对于斜拉索体系部分,主梁的截面形式及斜拉索的锚固间距对结构影响不大。更多还原

【Abstract】 A self-anchored suspension and cable-stayed structure with three towers is located in Hanzhong,Shaanxi,China,which has a span of 705 meters.In order to study the mechanical properties of this bridge,the influence parameters of nonlinearity,rise-span ratio of main cable,anchor space of minor-cable and main-cable are analyzed.Numerical results show that effect of nonlinearity should be considered in the design and calculation of medium-span self-anchored suspension and cable-stayed bridge;reasonable arrangement of rise-span ratio of main cable and anchor space of minor-cable is the main point in the design of minor-tower.更多还原