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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 the energy principle and the characteristics of the bridge structure, a simplified method of calculating the internal forces and deformations of the bridge is proposed. In this method, the main cables, cables and hangers of the self-anchored cable-stayed bridge are cut off and replaced by unknown force. The stiffening girder and cable system are taken as separate bodies for analysis respectively. And cable system internal force of the basic formula. Finally, taking the completed Zhuanghe Bridge as an example, the results of the simplified method and the finite element method presented in the paper are compared, and the two agree well with each other.