Study On The Hydrodynamic Pressure About The Deep Water Pier Arch Bridge Of Earthquake Effect

Varieties of unpredictable naural disaster can cause great impact to thestructure.Earthquake is one of the devastating and unpredictable disasters.China has alot of deep-water bridges in the earthquake-prone areas.The role of fluid-structureinteraction in earthquake will change the dynamic characteristics of bridge, thusinfluence the seismic response of bridge.Some factors were not considered in ourspecification for the calculation of hydrodynamic pressure under earthquake.So itrequires a lot of engineers to check the accuracy.This paper relying on the buyunbridge in Pu’er city,the bridge in nearing completion.1Introduced Morison equation method to calculate the water-pier dynamicinteraction theory.2Introduced fluid-structure interaction theory,and got the influence of water onthe seismic response of deep-water bridge3Combining with fluid-structure interaction theory, this paper got the influencelaw of water depth to earthquake response by research on the pressure of water.4By the differences of the calculation results and theory results,this paper putforward a simplified calculation method of hydrodynamic pressure.