斜柱桥初步设计研究

发布时间：2018-04-26 23:25

本文选题：斜柱桥 + 参数研究　；参考：《广西大学》2017年硕士论文

【摘要】：桥梁结构体系的创新对工程界来说具有重大的意义,正是由于体系创新,才有了今天丰富多样的桥梁形式。本文在总结前人对桥梁体系所做出的研究成果基础上,提出了一种新型桥梁——斜柱桥,主要围绕斜柱桥初步设计展开,对相关问题做了研究。(1)本文首先对四种基本桥型的发展历史作了简要回顾,指出桥梁结构体系创新的意义,总结前人在现有几种桥型基础上所做的创新。(2)介绍斜柱桥的结构形式及设计理论基础。斜柱桥主要构件为两根斜杆及多根水平索,两根斜杆连接成V型后与墩台固结,与桥面系分离,两斜杆之间通过水平拉索连接,桥面荷载通过立柱传给斜杆。通过调整水平索力可以使斜杆主要受轴力作用,弯矩大幅降低,主要变形特征为轴向压缩变形,故称为斜柱。本文推导出调整水平索索力的两种方法,一种是根据斜柱桥力学原理推导出索力调整公式,另一种是参考斜拉桥调索的影响矩阵法。(3)对斜柱桥关键设计参数的研究。本文选取了斜柱桥设计过程中涉及的几个重要参数,主要包括水平索是否从中间立柱处断开、两V型结构是否对称布置、斜柱与水平方向的夹角及水平索间距。通过研究特定参数对结构产生的影响,计算分析总结相关规律,进而得到不同设计参数对结构力学性能的影响。(4)斜柱桥方案试设计。本文首先拟定斜柱桥各主体结构尺寸及截面特性,确定边界条件,之后运用有限元分析软件Midas/Civil建立斜柱桥空间模型,参照现有规范拟定技术标准和荷载组合,对斜柱桥静力特性、动力特性及稳定性进行计算,结果均满足规范要求。
[Abstract]:The innovation of the bridge structure system is of great significance to the engineering community. It is the system innovation that has a rich variety of bridge forms today. On the basis of the research results made by the predecessors to the bridge system, a new type of bridge, inclined column bridge is proposed, which is mainly around the preliminary design of the oblique column bridge. The problem is studied. (1) first of all, this paper briefly reviews the history of the development of the four basic bridges, points out the significance of the innovation of the bridge structure system, and summarizes the innovations made by the predecessors on the existing bridge types. (2) the structural form and the theoretical foundation of the oblique column bridge are introduced. The main components of the skew column bridge are two oblique bars and multiple horizontal cables. After the two inclined rods are connected to the V type and the pier is consolidated and the pier is consolidated and separated from the bridge deck system, the two inclined rods are connected by the horizontal cable. The load of the deck is passed to the inclined rod through the vertical column. By adjusting the horizontal cable force, the inclined rod is mainly affected by the axial force and the bending moment is greatly reduced. The main deformation is the axial compression deformation, so it is called the oblique column. This paper deduces the adjustment in this paper. Two methods of horizontal cable force, one is to derive the adjustment formula of cable force according to the mechanics principle of oblique column bridge, the other is to refer to the influence matrix method of the cable of cable-stayed bridge. (3) the study of the key design parameters of the skew column bridge. This paper selects several important parameters involved in the design process of the oblique column bridge, mainly including whether the horizontal cable is from the middle column or not. It is disconnected, the two V structure is symmetrical arrangement, the angle of the inclined column and horizontal direction and the horizontal cable spacing. By studying the influence of the specific parameters on the structure, the related laws are summed up, and the influence of the different design parameters on the mechanical properties of the structure is obtained. (4) the design of the oblique column bridge scheme. First, the main body junctions of the oblique column bridge are drawn up. The boundary conditions are determined by the structure size and cross section characteristics. Then the spatial model of the skew column bridge is established by the finite element analysis software Midas/Civil. The static characteristics, dynamic characteristics and stability of the skew bridge are calculated with reference to the existing specifications and load combinations. The results are full of standard requirements.

【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U448

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