Study On Dynamic Performance Of Long Span Over Water Steel Tube Arch Bridge

The aqueduct is an important tectonic structure of irrigation drainage engineering.Aqueduct is different from the ordinary bridge and ordinary bridge under the role of people and vehicle load.However,the aqueduct need to withstand water weight,taking into account the water is fluid,it trough body structure between each other and exist interaction effects,on the aqueduct body structure produce adverse effects and aqueduct structure itself particularity determines the research the dynamic performance is critical.This paper first introduces the history and development of aqueduct aqueduct dynamic characteristics calculation of theory.On the basis of domestic and foreign research scholars,this paper takes the Tongliang County Housing and water pumping project across the river as the background project,using civil Midas software to analyze the dynamic performance of the arch bridge.In this paper,the following contents are mainly studied:(1)Details of arch bridge is introduced aqueduct dynamic analysis and calculation theory and fluid solid coupling system of finite element theory and method to determine the selected.(2)Through the modal analysis of the arch bridge,the natural vibration characteristics of the arch bridge under different conditions are calculated,and the factors affecting the natural vibration characteristics are compared and analyzed.(3)Considering fluid solid coupling system in water on the trough body itself of adverse effects,the calculation analysis of water produced by the vibration effect,contrast analysis consider the water arch bridge structure vibration effect of water with and without considering the vibration effect of water displacement,internal force and stress.(4)According to the calculation results of the arch bridge,the reasonable control scheme and health monitoring program are put forward..