自锚式悬索桥合理成桥状态的实用计算方法  

Practical Calculation Method of Rational Completion Status of Self-anchored Suspension Bridge

作　　者：李小年[1] 张小月[1] 马如进[1] 陈艾荣[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《公路交通科技》2013年第6期82-87,共6页Journal of Highway and Transportation Research and Development

基　　金："十一五"国家科技支撑计划项目(2009BAG15B01);交通运输部重大科技专项建设科技项目(2011318494160)

摘　　要：合理确定吊索张力及主缆线形是自锚式悬索桥设计中的关键问题。基于加劲梁的受力特性,推导了用于吊索张力优化的刚性支承连续梁法;从悬索的基本平衡微分方程出发,提出了主缆线形计算的梁比拟法;两者结合使用,通过常用的杆系结构线性分析程序即可进行吊索力优化及主缆线形计算,从而确定自锚式悬索桥的合理成桥状态。算例分析表明,实用方法的力学意义明确、操作简单且计算精度高,可在设计实践中推广。Reasonable determination of hanger tensions and main cable configuration is the key issue in designing self-anchored suspension bridges. According to the mechanical characteristics of stiffening rigid supported continuous beam method is derived to optimize the hanger girder, the tensions. Based on the equilibrium differential equation of the cable, beam analogy method is proposed to calculate the main cable configuration. Combining the two methods, the hanger tensions and cable configuration of the bridge can be accurately calculated through common linear analysis program for truss structure, then the rational completion status of self-anchored suspension bridge is determined. The example analysis shows that the practical method has the advantages of mechanical significance, concise algorithm, and high accuracy. It is worth popularizing in design practice.

关 键 词：桥梁工程 自锚式悬索桥 刚性支承连续梁法 梁比拟法 合理成桥状态 吊索张力 主缆线形 

分 类 号：U442[建筑科学—桥梁与隧道工程]