大跨径自锚式悬索桥主缆的线形计算及误差分析

发布时间：2018-01-07 01:39

本文关键词：大跨径自锚式悬索桥主缆的线形计算及误差分析　出处：《武汉工程大学学报》2016年06期 　论文类型：期刊论文

【摘要】：针对自锚式悬索桥的主缆线形在施工过程中的变化特性,自编分段悬链线法和抛物线法程序实现了大跨径自锚式悬索桥主缆线形、空缆线形、各节段无应力长度、吊点坐标和索鞍预偏量等几何特征参数的精确计算;结合工程实例,对自编程序与Midas civil软件计算结果进行了比较分析.结果表明:与有限单元法相比,分段悬链线法计算得到的索鞍预偏量相对误差为11.3%,抛物线法计算得到的索鞍预偏量相对误差为23%.在施工中,分段悬链线法和抛物线法计算结果需要反复修正迭代以综合确定主缆线形.
[Abstract]:According to the characteristics of the main cable shape of the self-anchored suspension bridge during the construction process, the main cable shape and the empty cable shape of the long span self-anchored suspension bridge are realized by using the self-compiled program of segmental catenary method and parabola method. The precise calculation of geometric characteristic parameters such as the length of each segment without stress, the coordinates of the suspension point and the predeflection of the saddle. Combined with engineering examples, the calculation results of self-programmed program and Midas civil software are compared and analyzed. The results show that the results are compared with the finite element method. The relative error of cable saddle predeflection calculated by segment catenary method is 11.3 and that by parabola method is 230.In construction. The results of piecewise catenary method and parabola method need to be revised and iterated repeatedly to determine the main cable shape synthetically.
【作者单位】：武汉工程大学资源与土木工程学院;
【基金】：武汉工程大学研究生创新基金(CX2015040)
【分类号】：U448.25
【正文快照】： 1引言自锚式悬索桥因其造型新颖、跨越能力强、对地质条件要求低等特点,现已成为大、中跨径桥梁中具有较强竞争力的一种桥型,尤其是在软土地区和城市景观桥梁中,自锚式悬索桥越来越受到青睐[1-3].随着国民经济和交通事业的快速发展,人们审美需求的不断提高,桥梁的跨越能力和靓

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