矮塔斜拉桥设计参数的优化

发布时间：2018-06-10 07:29

本文选题：矮塔斜拉桥 + 设计参数　；参考：《重庆交通大学》2015年硕士论文

【摘要】：近年来,桥梁工程科学技术取得了跨越式的发展成就,也出现了越来越多的新型桥梁结构。一种叫做矮塔斜拉桥的新的结构样式就是最近几年浮现出来的。它综合利用了预应力混凝土箱梁桥和预应力混凝土斜拉桥的受力特点和结构形式,从而让梁桥的跨度得到很大的增长。由于矮塔斜拉桥具有优越的结构性能以及良好的结构特性,在全世界范围内,得到了越来越广泛的使用,但是目前它的设计基本上还都是参照已有的连续梁桥和常规斜拉桥的理论研究,具有针对性的相关研究比较稀少。本文以云南省在建的省内第二座矮塔斜拉桥——瑞丽江特大桥为实桥工程背景,主要针对此类桥型的设计参数展开研究,以期对此类桥型的设计工作提供理论指导。在文章的开始,本文主要简单介绍了矮塔斜拉桥国内国外的发展历程及研究情况,概括性的讲了矮塔斜拉桥的本身的特性,并指出了目前矮塔斜拉桥建设前进过程中所遇到的一些阻碍。本文针对矮塔斜拉桥设计中要遇到的一些问题,详细地介绍了矮塔斜拉桥的于设计相关的特性,并预测了其今后的发展状况。然后,选取了一座目前在建即将通车的矮塔斜拉桥——瑞丽江特大桥为目标参照实桥工程背景,采用目前国内比较流行的有限元分析软件Midas/Civil软件模拟结构受力分析,并将其作为解析矮塔斜拉桥设计参数变化的参照模型。在文章的最后,以参照桥梁的模型为基础,通过使其相关的设计参数在某一合理范围内不断变化,来分别计算并总结不一样的设计参数对矮塔斜拉桥受力的影响,最后总结出矮塔斜拉桥在一定的主梁刚度、无索区长度、边主跨比和塔跨比的范围内,矮塔斜拉桥受力特征的变化趋势。
[Abstract]:In recent years, bridge engineering science and technology has made leapfrog development achievements, but also more and more new bridge structures. A new structure called a low-tower cable-stayed bridge has emerged in recent years. The prestressed concrete box girder bridge and the prestressed concrete cable-stayed bridge are comprehensively utilized in this paper, so that the span of the girder bridge can be greatly increased. Because of the excellent structural performance and good structural characteristics of the cable-stayed bridge with low tower, it has been used more and more widely all over the world. But at present, its design is basically referring to the existing continuous beam bridge and conventional cable-stayed bridge theory research, targeted research is relatively rare. This paper takes the second long tower cable-stayed bridge-Ruilijiang super bridge under construction in Yunnan Province as the real bridge engineering background, mainly studies the design parameters of this kind of bridge type, in order to provide theoretical guidance for the design work of this kind of bridge type. At the beginning of the article, this paper mainly introduces the development history and research situation of the cable-stayed bridge with low tower at home and abroad, and generalizes the characteristics of the cable-stayed bridge with low tower. Some obstacles encountered in the construction of the cable-stayed bridge with low tower are pointed out. Aiming at some problems in the design of the cable-stayed bridge with low tower, this paper introduces in detail the characteristics related to the design of the cable-stayed bridge with low tower, and predicts the development of the bridge in the future. Then, the paper selects a short tower cable-stayed bridge-Ruilijiang super bridge, which is about to open to traffic at present, as the target of reference to the real bridge engineering background, and uses Midas / Civil, a popular finite element analysis software, to simulate the structural stress analysis. It is used as the reference model to analyze the design parameters of the cable-stayed bridge with low tower. At the end of the paper, based on the model of the bridge, the influence of different design parameters on the stress of the cable-stayed bridge with low tower is calculated and summarized by changing the design parameters within a reasonable range. Finally, the variation trend of the stress characteristics of the low tower cable-stayed bridge is summarized in the range of the stiffness of the main beam, the length of the cable-stayed bridge without cable, the ratio of the side main span and the ratio of the tower to the span.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.27

【参考文献】