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自锚式悬索桥主缆线形计算方法
引用本文:狄谨,武隽.自锚式悬索桥主缆线形计算方法[J].交通运输工程学报,2004,4(3):38-43.
作者姓名:狄谨  武隽
作者单位:长安大学,桥梁与隧道陕西省重点实验室,陕西,西安,710064
摘    要:以长沙市三汉矶湘江大桥为工程背景,对自锚式悬索桥的主缆线形及无应力长度的计算方法进行了研究,推导出两种基于不同假定下的主缆线形及无应力索长的计算方法:假定主缆自重沿跨径均布的抛物线法和假定主缆自重沿弧长均布的分段悬链线法。结果发现:抛物线法比较简单,但计算结果比较粗略;分段悬链线法考虑因素比较全面,计算相对复杂,但结果比较精确;对于空缆线形竖向坐标值两种方法的误差为0.739%,无应力索长计算两种方法的误差仅为0.31%。结果表明:抛物线法和分段悬链线法均可应用于自锚式悬索桥的主缆线形计算。

关 键 词:桥梁工程  自锚式悬索桥  抛物线  分段悬链线  线形  无应力长度
文章编号:1671-1637(2004)03-0038-06
修稿时间:2004年3月11日

Calculation methods for cable curve of self-anchored suspension bridge
DI Jin,WU Jun University,Xi'an ,China.Calculation methods for cable curve of self-anchored suspension bridge[J].Journal of Traffic and Transportation Engineering,2004,4(3):38-43.
Authors:DI Jin  WU Jun University  Xi'an  China
Institution:DI Jin,WU Jun University,Xi'an 710064,China)
Abstract:Took Sanchaji suspension bridge in Changsha as a case study, based on different hypothesis, two methods were deduced, the parabola method of cable gravity distributing uniformly along the span, and the catenaries method of gravity distributing equally along the curve. It is pointed that the parabola method is straightforward, but the results are relatively coarse, and the catenaries method is relatively complicated, but the results are precise, which takes into account all-around factors. For the two methods above, the error of vertical coordinate of cable is 0.739%, and the error of zero-stress length for cable is 0.31%. The results show that the two methods are feasible to calculate the cable curve of self-anchored suspension bridge. 5 tabs, 7 figs, 5 refs.
Keywords:bridge engineering  self-anchored suspension bridge  parabola  segmental catenaries  cable curve  zero-stress length  
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