三塔混凝土自锚式悬索桥静动力分析

发布时间：2018-01-17 21:07

本文关键词：三塔混凝土自锚式悬索桥静动力分析　出处：《大连理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：悬索桥是由加劲梁、主缆、主塔、吊杆、索鞍和锚固系统等组成的悬吊组合体系,自锚式悬索桥以美观的外形、良好的经济性能以及对地形地质状况的强适应性等优点,在国内发展非常迅速。在传统悬索桥桥型上继续增加跨越能力困难比较大,因此连续多塔的自锚式桥梁形式被提出,尤其三塔自锚式悬索桥的方案,受到设计师的青睐。作为新的结构形式三塔自锚式悬索桥在理论和实践上的认识还不够全面,目前已建成的三塔自锚式悬索桥加劲梁都采用钢主梁形式,混凝土主梁的大桥还没有实例。本文拟在三塔混凝土自锚式悬索桥的分析理论、‘静力行为、动力行为、体系优化和局部构件设计等方面进行研究和探讨。以大连金渤海岸世茂1号桥为工程背景,利用有限元分析软件MIDAS建立全桥模型,系统分析三塔混凝土自锚式悬索桥的静动力性能,包括成桥阶段初始平衡分析、成桥以后车辆荷载作用分析、特征值分析和地震力作用分析；比较不同加劲梁支撑体系在车辆荷载作用下主塔、主梁和主缆的内力,研究该桥合理的加劲梁支撑体系；以成桥阶段为基础,分析边塔索鞍与塔顶纵向滑动和固结两种约束体系在车辆荷载、温度效应、混凝土收缩徐变和纵向地震力作用下的内力和位移,分析两种体系下的结果,探讨该桥成桥以后合理的边塔索鞍约束方式,并为该类桥梁的设计提供参考。本桥的减震设计采用在纵向布置粘滞阻尼器的方法,通过增加结构阻尼来消耗地震的能量,比选阻尼器布置方案有两种,分别是只在中塔塔梁连接处布置和在两个边塔塔梁连接处布置,为达到减震效果和使各塔受力均衡,选择只在中塔塔梁连接处布置的方案。研究了阻尼器参数对减震效果的影响,并确定阻尼器参数合理选择范围。设计了一种双孔双吊耳的索夹结构,根据悬索桥设计规范对设计的索夹进行孔径、抗滑系数和索夹强度的计算,同时利用有限元软件ANSYS Workbench对设计的索夹进行整体静力分析,有限元方法分析的结果也满足规范要求,所以设计的索夹可以用于本桥。
[Abstract]:The suspension bridge is composed of stiffening girder, main tower, main cable, suspender, suspension system of cable saddle and anchorage system, self anchored suspension bridge with beautiful appearance, good economic performance and strong adaptability to geological condition and other advantages, in the domestic development is very rapid. Continue to increase capacity across difficult in the traditional suspension bridge, so the continuous multi tower self anchored bridge are presented, especially the three tower self anchored suspension bridge scheme by designers. As a new form of knowledge structure of three self anchored suspension bridge in theory and practice is not comprehensive, the tower has been built in self anchored suspension bridges the steel girder, concrete girder bridge has not yet been demonstrated. This paper intends to analyze the theory of self anchored suspension bridge in three tower concrete ", static behavior, dynamic behavior, system optimization and local component The design and other aspects are studied and discussed.
Dalian golden beach Shimao No. 1 Bridge as the engineering background, the establishment of full bridge model using finite element analysis software MIDAS, analysis of the static and dynamic properties of three concrete self anchored suspension bridge system, including the analysis of bridge bridge after the initial balance, vehicle load analysis, analysis and analysis of seismic force value comparison of different characteristics; the stiffening girder supporting system under vehicle load of main tower, girder and cable force of the bridge, stiffening reasonable beam support system; to bridge phase based analysis of the longitudinal sliding side saddle and Tasso and consolidation of two constraint system in the vehicle load, temperature effect, shrinkage and creep of concrete and the internal force and displacement the longitudinal seismic loads, analysis of two kinds of system results, explore the bridge after reasonable boundary constraints Tasso provide a reference for the design of the saddle, and for this kind of bridge. The bridge seismic design Using method of viscous dampers in longitudinal arrangement, by increasing the damping to consume the seismic energy, selection of damper layout scheme has two kinds, respectively is only in the beam at the junction of Tata and Tata arranged in two side beam connection arrangement, in order to achieve the damping effect and the tower stress equilibrium, selection of Tata only in the beam junction layout project. The parameters of the damper effect on the damping effect of the damper parameters, and determine the reasonable selection range. Design a dual lug clamp structure, according to the design specification for the design of suspension bridge cable clamp for aperture, calculate the anti slide coefficient and strength of cable clamp. At the same time, using the finite element software ANSYS Workbench to design the overall static analysis of cable clamp, finite element analysis results meet the requirements, so the design of the cable clamp can be used for the bridge.

【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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