厦漳跨海大桥北汊主桥合理成桥状态研究  

Study of Rational Completed Bridge State of North Main Bridge of Xiazhang Sea-Crossing Bridge

作　　者：苏剑南[1] 

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《桥梁建设》2013年第4期44-48,共5页Bridge Construction

摘　　要：为研究斜拉桥合理成桥状态的计算方法,以厦漳跨海大桥北汊主桥为背景,采用大型有限元软件TDV RM2006建立全桥有限元模型,通过优化结构成桥索力使主梁和桥塔达到设计期望的状态,用最小弯曲能量法初定近似合理的成桥状态,以该状态下的部分斜拉索索力和主梁弯矩作为目标向量,通过影响矩阵法求解所有斜拉索初张力,通过微调局部斜拉索的初张力修正几何非线性对静力优化结果的不利影响,最终确定北汊主桥的合理成桥状态。实践证明,最小弯曲能量法和影响矩阵法能很好地弥补相互间的局限性,能在较短的时间里确定斜拉桥的理想成桥状态。To study the calculation method for the rational completed bridge state of cablestayed bridge, the north main bridge of the Xiazhang Sea-Crossing Bridge of the similar kind was cited as an example and the large software TDV RM2006 was used to establish the finite element model for the whole bridge of the bridge. The main girder and pylons of the bridge were firstly made to meet the desired designed state through optimizing the stay cable forces of the completed bridge. The least bending energy method was then used to preliminarily determine the approximate rational completed bridge state of the bridge and by taking the cable forces of part of the stay cables and the bending moment of the main girder under such state as the target vector, the initial tensioning forces of all stay cables were calculated by the influence matrix method, the adverse influences of the geometric nonlinearity on the static force optimization were modified through fine adjusting the local initial tensioning forces of the stay cables and finally the rational completed bridge state was determined. Practice proves that the least bending energy method and the influence matrix method can well offset the limitations of the two methods and can determine the rational completed bridge state of the cable-stayed bridge in the short time period.

关 键 词：斜拉桥 合理成桥状态 最小弯曲能量法 影响矩阵法 有限元法 结构设计 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]