基于MATLAB的自锚式悬索桥空间主缆找形计算分析

Form Finding Calculation and Analysis of Space Main Cable of Self Anchored Suspension Bridge Based on MATLAB

摘要: 本文阐述了自锚式悬索桥空间主缆线形计算方法和空间主缆MATLAB程序开发思路，结合分段悬链线理论为依据编制的解析法计算程序，利用有限元法程序建立某自锚式悬索桥完整的成桥模型。结合某一实际自锚式悬索桥空间主缆找形，通过数值计算法结合有限元计算法解决自锚式悬索桥空间主缆成桥找形，精度满足施工要求。利用求得的主缆无应力长度建立空缆模型，用于后续施工过程模拟，对后续施工中主缆、吊杆下料长度计算，主缆挂设控制，索夹的安装预偏，吊杆的张拉方案等工作有着重要的指导意义。

Abstract: This paper describes the calculation method of spatial main cable shape of self anchored suspension bridge and the development idea of spatial main cable MATLAB program. Combined with the analytical method calculation program compiled based on the segmented centenary theory, a complete bridge model of a self anchored suspension bridge is established by using the finite element method program. Combined with the form finding of the spatial main cable of a practical self anchored suspension bridge, the form finding of the spatial main cable of the self anchored suspension bridge is solved by numerical calculation method and finite element calculation method, and the accuracy meets the construction requirements. The unstressed length of the main cable is used to establish an empty cable model, which is used for the simulation of the subsequent construction process. It has an important guiding significance for the calculation of the blanking length of the main cable and the suspender, the control of the main cable hanging, the pre-deflection of the cable clamp installation, and the tensioning scheme of the suspender in the subsequent construction.