基于影响矩阵的双塔斜拉桥合理成桥状态研究  

Research on Reasonable Completion State of Cable-stayed Bridge with Twin Towers by Influence-matrix Method

作　　者：郑一峰[1] 毛健[1] 尹笑 郑传峰[1] 

机构地区：[1]吉林大学建设工程学院,长春市130026

出　　处：《公路》2017年第2期82-85,共4页Highway

基　　金：国家自然科学基金项目;项目编号51508223

摘　　要：斜拉桥是高次超静定柔性结构,其主要特点是可以通过调整斜拉索索力对自重引起的内力和桥体变形进行人为地控制,因此可以通过对斜拉桥进行优化设计,找到一组可以使桥梁达到合理成桥状态的斜拉索索力。提出采用索力影响矩阵的主梁力平衡法与刚性支承连续梁法相结合确定合理成桥索力的方法,并以某双塔斜拉桥为工程实例进行计算分析,得到计算结果与实际结果相接近,最大偏差仅为1.7%,表明该方法具有可行性。Cable-stayed bridge is a form of highly indeterminate flexible structure, which main characterizes is that the structure stress and displacement caused by its gravity can be controlled by adjusting the cable force. Therefore it is feasible to search a set of cable forces to match the optimal design, in this paper, the cable force influence matrix of beam main force balance method and the rigid support continuous beam method are combined to determine the rational cable force at the completion period. Moreover, an example of two tower cable-stayed bridge is taken to tested the method, and the result shows that the maximum deviation to the true value is just 1.7%, which strongly proves that such method is accurate and feasible.

关 键 词：斜拉桥 影响矩阵 合理成桥状态 研究 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]