混凝土自锚式悬索桥极限跨径分析  

Ultimate Span Length Analysis for Concrete Self-Anchored Suspension Bridges

作　　者：陈鸿鸣[1] 

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092

出　　处：《结构工程师》2010年第6期59-63,共5页Structural Engineers

摘　　要：国内自锚式悬索桥的兴建方兴未艾,而该结构的极限跨径在桥梁界论述较少。就此问题从结构因素出发,通过研究主缆线性矢跨比、边跨和中跨比值、塔高和主跨比、鞍座左右主缆切角、二期荷载和活载比重等因素对极限跨度的影响,推导了双塔三跨混凝土自锚式悬索桥的极限跨度表达式。并结合目前混凝土自锚式悬索桥常用的材料特性、材料用量、通常的结构布置形式,对混凝土加劲梁自锚式悬索桥的极限跨度进行参数分析,给出了混凝土自锚式悬索桥的极限跨度。In China,the construction of the self-anchored suspension bridges is still growing.But the ultimate span length of this kind of structure is seldom discussed in bridge engineering circles.This paper researched the influence of structural factors on ultimate span length,such as,linear ratio of rise to span of the main cable,the ratio of side span to main span,the ratio of pylon height to main span,main cable tangent angle of both sides of saddle,and the ratio of second phase load to live load.The ultimate span length expression of concrete self-anchored suspension bridges with double pylons and three spans was deduced in this paper.According to the common material characteristics,material consumption,general layout of present concrete self-anchored suspension bridge,the parametric analysis was performed,and the ultimate span length was presented for the concrete self-anchored suspension bridges with stiffening girder.

关 键 词：桥涵工程 自锚式悬索桥 极限跨度 加劲梁 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]