星海湾跨海大桥施工控制关键问题研究

发布时间：2018-06-24 06:16

本文选题：悬索桥 + 有限元模型　；参考：《大连理工大学》2014年硕士论文

【摘要】：大连市正在建造的星海湾跨海大桥是一座钢桁架双层地锚式悬索桥。本文以正在进行的桥梁施工建设为工程背景,对星海湾跨海大桥进行施工控制研究,包括施工前控制计算与吊装过程分析。本文给出的计算数据和步骤可直接用于桥梁施工监控,其后进行的研究和探讨可为后续同类施工提供参考。主要研究内容可分为以下几个部分： 1、用通用有限元软件ANSYS建立全桥模型,从理想成桥状态出发,给出内力线形参数。进行施工前控制计算,以模型输出主缆、吊索数据为基础进行修正,最终得到主缆各索股下料长度、吊索下料长度：进行索鞍预偏的分析与计算,阐述索鞍顶推控制原则,并研究了基准索股的调整计算和监控方法；进行索夹放样计算,以确保吊索精确安装。 2、利用倒拆分析对吊装过程进行模拟,在比较了常用的临时连接方法后,提出临时匹配件连接方法,并对其工作原理及模拟方法做出说明,重点研究了吊装过程中结构内力与线形变化规律,包括临时匹配件的下缘开口、上缘错动和主缆线形变化规律,临时连接轴向内力变化规律及顶推过程中主塔应力变化规律,研究表明临时匹配件可以完成吊装过程。 3、针对该吊装方案,进一步研究临时连接对吊装过程内力与变形的影响,比较了加劲梁吊装分别采取临时匹配件和临时铰接时,梁段下缘开口、主缆线形、临时连接轴力和主梁应力等参数变化规律的异同。最终得出结论,临时匹配件连接可以消减应力峰值,对结构比较有利。
[Abstract]:The Xinghai Bay Cross Sea Bridge is being built in Dalian is a steel truss double ground anchorage suspension bridge. This paper, taking the construction of the ongoing bridge construction as the project background, studies the construction control of the Xinghai Bay Bridge, including the pre construction control calculation and the analysis of the lifting process. The calculation data and steps given in this paper can be directly applied to the bridge. The study and discussion of the beam construction can provide reference for the following similar construction. The main research contents can be divided into the following parts:
1, using the universal finite element software ANSYS to establish the full bridge model, from the ideal bridge state, the internal force linear parameters are given, and the pre construction control calculation is carried out. Based on the model output main cable and the sling data, the length of the material and the length of the sling is finally obtained. The analysis and calculation of the saddle predeflection is carried out, and the cable saddle is described. The cable saddle is expounded. The cable saddle is expounded. The principle of jacking control is studied, and the adjustment calculation and monitoring methods of datum strands are studied, and the lofting calculation of cable clips is carried out to ensure accurate installation of sling.
2, using the reverse analysis to simulate the hoisting process, after comparing the common temporary connection methods, the temporary fittings connection method was put forward, and its working principle and simulation method were explained. The structural internal force and linear change law of the structure during the hoisting process were emphatically studied, including the lower edge opening of the temporary fittings, the upper edge dislocation and the main cable. The change rule of the shape, the variation of the internal force of the temporary connection and the variation of the stress of the main tower during the jacking process are studied.
3, in view of the hoisting scheme, the effect of temporary connection on the internal force and deformation of the hoisting process is further studied, and the differences and similarities between the lower edge opening of the beam section, the line shape of the main cable, the temporary connection of the axial force and the stress of the main beam are compared. Finally, the conclusion, the connection of the temporary fittings, is finally obtained. It can reduce the stress peak, which is favorable to the structure.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.25

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