大跨徑過水鋼管拱橋動(dòng)力性能研究
[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.
【學(xué)位授予單位】:重慶交通大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:U441.3;U448.22
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