自锚式吊拉协作体系桥简化计算方法研究

Study on Simplified Calculation Method of Self-anchored Cable-stayed Suspension Bridges

基于能量原理,结合桥型结构特点,提出了分析自锚式吊拉协作体系桥内力和变形的简化计算方法。该方法将自锚式吊拉协作体系桥的主缆、拉索和吊杆截开,用未知力来代替,分别取加劲梁和缆索系统为分离体进行分析,导出了求解加劲梁内力、挠度和缆索系统内力的基本公式。最后以已建成的庄河建设大桥为例,对文中提出的简化方法结果与有限元方法结果进行了比较,二者吻合较好。

Based on energy principle, a simplified calculation method is proposed to calculate the behavior of self-anchored cable-stayed suspension bridge. The main cable, stayed cables and hangers of self-anchored cable-stayed suspension bridge are truncated and replaced by unknown forces in this method. The formulas for calculating the internal forces and deformation of girder and the internal forces of cable system are deduced. Take Jianshe Bridge in Zhuanghe as an example, the calculation results of simplified calculation method and finite element method are compared and the results of these two methods are matched well.