普湾拱桥施工控制研究
发布时间：2019-02-20 07:45
【摘要】：近年来,伴随着交通事业的大力建设,桥梁作为工程建设中的重要环节,其研究工作非常艰巨。目前,国内外的桥梁其结构趋近于大跨度,形式多样化的特点。提篮拱桥,结构比较美观,受力相对特殊,所以能获得设计人员的关注。但因其结构构造形式复杂,导致在实际工程建设中颇具困难。所以,对施工完成后的桥梁状态,若想结构状态达到设计目标,进行施工过程得控制就显得非常重要。本文,以在建工程…普湾拱桥为研究背景,通过Midas有限元程序对结构的整个建造过程进行了仿真模拟计算,模拟分析了建设过程中不可避免的重要问题,基本工作如下所述：(一)介绍了系杆拱桥及施工控制研究现状及趋势,并对目前工程中常用的拱桥施工方法做了简要介绍,阐述了各种方法的施工工序,并概括了各自的施工关键点。(二)对现代桥梁施工控制内容和方法进行了简要介绍,并对施工控制的目的和方法,以及对影响施工控制的因素和解决办法进行了具体阐述。(三)对于该桥采用悬臂拼装技术进行中跨拱肋的施工,介绍了拼装过程中需要注意的事项。对比介绍了目前计算扣索力的几种常用方法,详细阐述了弹性-刚性支撑法、有限元法计算理论。本文通过有限元分析方法及弹性-刚性支撑法,对本桥斜拉扣索进行了计算,制定了两种扣索张拉方案,结果都能使整个拱肋安装过程中结构应力及控制点位移满足要求,逼近于中拱肋一次落架线形。通过方案比选供施工单位根据现场施工条件进行选择。(四)主要对背景工程进行了吊杆力控制。通过差值迭代法计算吊杆张拉控制力,并对比分析了中跨吊杆在拟定的三种张拉方案下,其吊杆拉力、主梁和拱肋的应力变化,综合比较施工的方便性,从而对中跨吊杆选出相对较好的张拉方案。(五)通过正装法,利用Midas有限元程序进行仿真模拟分析。对整个施工过程中关键阶段的拱肋、主梁关键截面应力及控制点位移进行控制,并通过系杆的张拉控制,使桩基顶部水平位移在控制范围内。结果表明,在施工全过程中,结构受力及变形状态均能满足设计要求。
[Abstract]:In recent years, with the construction of transportation, bridge as an important link in engineering construction, its research work is very arduous. At present, the structure of bridges at home and abroad approaches to long span and diversified forms. Basket arch bridge, the structure is more beautiful, the force is relatively special, so can get the attention of designers. However, because of its complex structural form, it is difficult in practical engineering construction. Therefore, it is very important to control the construction process if the structure state is to reach the design goal. In this paper, the construction in progress. Based on the research background of Puwan arch bridge, the whole construction process of the structure is simulated and calculated by Midas finite element program, and the unavoidable important problems in the construction process are simulated and analyzed. The basic work is as follows: (1) the present situation and trend of the research on tied arch bridge and its construction control are introduced, and the common construction methods of arch bridge are briefly introduced, and the construction procedures of various methods are expounded. The key points of construction are summarized. (2) the contents and methods of modern bridge construction control are briefly introduced, and the purpose and method of construction control, as well as the factors affecting construction control and the solutions are expounded in detail. (3) the construction of middle span arch rib with cantilever assembly technology is introduced. Several commonly used methods for calculating buckling force are compared and introduced in this paper. The elastic-rigid bracing method and finite element method are described in detail. In this paper, by means of finite element analysis and elastic-rigid bracing method, the cable-stayed cables of the bridge are calculated and two kinds of tensioning schemes are formulated. The results show that the stress of the structure and the displacement of the control point can meet the requirements during the installation of the arch rib. Approaching to the middle arch rib once fall frame line. According to the site construction conditions, the construction units are selected through the scheme comparison. (4) the control of the suspender force is mainly carried out in the background engineering. The tension control force of the suspender is calculated by the difference iterative method, and the tension force of the suspender, the stress change of the main beam and the arch rib under the three kinds of tension schemes of the mid-span suspender are compared, and the convenience of construction is compared synthetically. Thus, a relatively good tension scheme is selected for the mid-span suspenders. (5) Midas finite element program is used to simulate and analyze by formal dress method. The stress of the key section and the displacement of the control point of the main beam in the key stage of the construction process are controlled and the horizontal displacement of the top of the pile foundation is controlled by the tensioning control of the tie bar. The results show that the stress and deformation of the structure can meet the design requirements in the whole construction process.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4
本文编号：2426963
[Abstract]:In recent years, with the construction of transportation, bridge as an important link in engineering construction, its research work is very arduous. At present, the structure of bridges at home and abroad approaches to long span and diversified forms. Basket arch bridge, the structure is more beautiful, the force is relatively special, so can get the attention of designers. However, because of its complex structural form, it is difficult in practical engineering construction. Therefore, it is very important to control the construction process if the structure state is to reach the design goal. In this paper, the construction in progress. Based on the research background of Puwan arch bridge, the whole construction process of the structure is simulated and calculated by Midas finite element program, and the unavoidable important problems in the construction process are simulated and analyzed. The basic work is as follows: (1) the present situation and trend of the research on tied arch bridge and its construction control are introduced, and the common construction methods of arch bridge are briefly introduced, and the construction procedures of various methods are expounded. The key points of construction are summarized. (2) the contents and methods of modern bridge construction control are briefly introduced, and the purpose and method of construction control, as well as the factors affecting construction control and the solutions are expounded in detail. (3) the construction of middle span arch rib with cantilever assembly technology is introduced. Several commonly used methods for calculating buckling force are compared and introduced in this paper. The elastic-rigid bracing method and finite element method are described in detail. In this paper, by means of finite element analysis and elastic-rigid bracing method, the cable-stayed cables of the bridge are calculated and two kinds of tensioning schemes are formulated. The results show that the stress of the structure and the displacement of the control point can meet the requirements during the installation of the arch rib. Approaching to the middle arch rib once fall frame line. According to the site construction conditions, the construction units are selected through the scheme comparison. (4) the control of the suspender force is mainly carried out in the background engineering. The tension control force of the suspender is calculated by the difference iterative method, and the tension force of the suspender, the stress change of the main beam and the arch rib under the three kinds of tension schemes of the mid-span suspender are compared, and the convenience of construction is compared synthetically. Thus, a relatively good tension scheme is selected for the mid-span suspenders. (5) Midas finite element program is used to simulate and analyze by formal dress method. The stress of the key section and the displacement of the control point of the main beam in the key stage of the construction process are controlled and the horizontal displacement of the top of the pile foundation is controlled by the tensioning control of the tie bar. The results show that the stress and deformation of the structure can meet the design requirements in the whole construction process.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4
【参考文献】
相关硕士学位论文 前1条
1 柳江涛;缆索吊装钢管混凝土拱桥拱肋的线形问题研究[D];北京交通大学;2011年
，本文编号：2426963
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