自锚式悬索桥主缆成桥线形及空缆线形计算  

Calculation of Main Cable Alignment and Free Cable Alignment of Self-anchored Suspension Bridge

作　　者：王青桥[1] 

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海市200092

出　　处：《城市道桥与防洪》2016年第4期160-163,172,共5页Urban Roads Bridges & Flood Control

摘　　要：介绍了基于分段悬链线法和抛物线法的自锚式悬索桥主缆成桥线形及空缆线形计算的原理和方法。成桥线形计算内容主要包括主缆理论成桥线形计算、主缆无应力索长计算、主缆与主索鞍切点计算及主索鞍位置计算。空缆线形计算内容主要包括索鞍偏移量计算、空缆理论线形计算及索夹安装位置计算。同时结合工程实例对比分析了抛物线法和分段悬链线法求解主缆成桥线形和空缆线形的误差影响。The article introduces the calculation principles and methods of main cable alignment and free cable alignment of self-anchored suspension bridge based on the segmental catenary method and parabolic method.The calculation contents of bridge alignment are mainly the theoretical bridge alignment calculation of main cable,the unstressed cable length calculation of main cable,the point calculation of main cable and main cable saddle,and the position calculation of main cable saddle.The calculation contents of free cable alignment are mainly the offset calculation of cable saddle,theoretical alignment calculation of free cable and installing position calculation of cable clamp.Also combined with the engineering cases,the errors and effects of main cable alignment and free cable alignment solved by the parabolic method and the segmental catenary method are compared and analyzed.

关 键 词：自锚式悬索桥 成桥线形 空缆线形 无应力索长 索鞍偏移量 影响矩阵 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]