基于线性规划的某特大桥施工扣索索力优选分析  

Optimization Analysis of Stayed-buckle Cable Forces of a Oversized Bridge Construction Based on the Linear Programming

作　　者：张耀庭[1] 颜燕祥 张正哲[3] 李艳芳 张敏[5] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]湖北工程学院城建学院,湖北孝感432000 [3]辽宁省水利水电科学研究院,辽宁沈阳110003 [4]武汉市蔡甸区公路管理局,湖北武汉430100 [5]湖北省交通规划设计院,湖北武汉430051

出　　处：《土木工程与管理学报》2014年第3期12-16,共5页Journal of Civil Engineering and Management

摘　　要：随着斜拉桥等大跨度桥梁工程的发展,桥梁上部结构与桥墩(台)之间连接的钢索索力的确定已成为桥梁设计与施工过程中的关键技术问题,索力取值合理与否直接关系到结构施工及运营阶段的安全与正常使用问题。本文结合某特大桥的施工,将线性规划原理引入到该桥的施工索力优化当中,以扣索用量最少为目标函数,以拉索索力大小为控制变量,以关键截面应力和悬臂端点挠度为约束条件;借助ANSYS软件和MATLAB工具,实现了结构线性工作阶段的施工(临时)扣索索力的优选分析。与已有的索力确定方法相比,本文提出的确定索力方法可减少施工过程中的调索次数,并提高设计索力的精度,为同类工程中钢索相对最优张拉力的确定提供了一种新的思路。With the development of the large-span bridge engineering, the affirmance of the wire rope cable forces of the connection between the bridge superstructure and piers （ Abutment） has become a key technical problem in bridge design and construction process. The design of cable force is directly related to safety issues and the normal use in the construction and operational stage. Combined with the construction of a Bridge,the article presents the principle of linear programming to optimize cable force. The optimal method of cable force uses the cable dosage minimum as an objective function and the pre-tension force as optimal variables, and then uses the stress in key sections and the deflection in end of cantilever as constraint conditions. With the help of ANSYS software and MATLAB tools,the optimization of construction （ temporary） buckle cable tension of stage of the structure of linear work is achieved. Compared with the existing cable force methods, the method proposed in this paper to determine cable force can reduce the number of tune cable construction process and improve the accuracy of the design of cable force. For similar projects, it provides a new way of thinking to determine the steel cables of the relative optimum tensile force.

关 键 词：施工扣索 最优索力 线性规划 目标函数 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]