大跨径过水钢管拱桥动力性能研究

发布时间：2019-04-30 06:31

【摘要】：渡槽是输水灌溉排洪工程中重要构造结构。渡槽不同于普通的桥梁,普通的桥梁承受人群和车辆荷载的作用,而渡槽需要承受水的重量,同时考虑到水体是流体,它与槽身结构彼此之间存在着相互的作用影响,会对槽身结构产生不利的影响效应,渡槽结构本身的特殊性决定了研究它的动力性能问题是至关重要的。本文首先简单介绍了渡槽工程的发展史及渡槽动力特性计算理论研究概况。在国内外研究学者的基础上,本文以铜梁县安居提水工程过琼江钢管拱桥依为托背景工程,运用Midas civil软件对过水钢管拱桥进行动力性能分析。在此,本文主要对下列内容进行相关研究:(1)详细介绍拱桥渡槽的动力分析计算理论及流固耦合体系有限元理论,确定本文要选用的方法。(2)对过水拱桥结构进行模态分析,分别计算过水钢管拱桥的不同工况下的自振特性,并对比分析出影响结构自振特性的因素。(3)考虑流固耦合体系中水体对槽身本身的不利影响,计算分析水体产生的振动效应,对比分析过水拱桥结构考虑水体振动效应与不考虑水体振动效应的位移、内力及应力情况。(4)针对本文过水钢管拱桥的计算分析结果,提出合理的监控方案和健康监测方案。
[Abstract]:Aqueduct is an important structure in irrigation flood drainage project. The aqueduct is different from the ordinary bridge, which bears the load of the crowd and the vehicle, and the aqueduct needs to bear the weight of the water. At the same time, considering that the water body is the fluid, there is an interaction between the aqueduct and the body structure of the aqueduct. The particularity of aqueduct structure determines that it is very important to study the dynamic performance of aqueduct structure. Firstly, the development history of aqueduct engineering and the general situation of theoretical research on dynamic characteristics of aqueduct are introduced in this paper. On the basis of domestic and foreign research scholars, this paper uses Midas civil software to analyze the dynamic performance of cross-Qiongjiang steel pipe arch bridge, which is based on Tongliang County Anju water-lifting project, and uses Midas civil software to analyze the dynamic performance of cross-Qiongjiang steel pipe arch bridge. The main contents of this paper are as follows: (1) the dynamic analysis and calculation theory of arch bridge aqueduct and the finite element theory of fluid-solid coupling system are introduced in detail. The method to be chosen in this paper is determined. (2) the modal analysis of the overflowing arch bridge structure is carried out to calculate the natural vibration characteristics of the overwater steel pipe arch bridge under different working conditions. The factors affecting the natural vibration characteristics of the structure are compared and analyzed. (3) considering the adverse effect of the water body on the tank body in the fluid-solid coupling system, the vibration effect of the water body is calculated and analyzed. The displacement, internal force and stress of the over-water arch bridge with and without the vibration effect of water body are compared and analyzed. (4) the results of calculation and analysis of the over-water steel pipe arch bridge in this paper are analyzed. Put forward reasonable monitoring scheme and health monitoring scheme.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U441.3;U448.22

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