The Numerical Analysis Of Static And Dynamic Properties Of A Cable Stayed Bridge

With the development of today's society,large-span bridge structure has become a important integral one of transportation.The appearance of the cable stayed bridge brings a goal to achieve the needs of the large-span bridge.The cable stayed bridge is named for its shape and with the application of stayed locks the main beam is fixed on the pylon.There are three main structures in the cable stayed bridge:the main beam,stayed locks and the pylon.And the states of them are bending,tension and compression.Such a combination structure can reduce the height and the weight,while saving material in the process to achieve the large-span structure.In this paper,we use the actual project for the study,while using the finite element software ANSYS to make the finite element model of the cable stayed bridge.We carry out the static analysis under its own weight,the modal and modes analysis,the time history analysis.In addition,we carry out the excitation coupling analysis of the moving vehicle loads,wind loads and the seismic waves.Then we give the appropriate design recommendations based on the law of the vibration and displacement of the cable stayed bridge.This paper follows the specific work:1.We use the finite element software ANSYS to make the model of the cable stayed bridge and carry out the static analysis under its own weight.Then we get the deformation and displacement characteristics of the beam,pylon and the cable,etc.2.Carrying out the modal analysis and getting the vibration frequency,vibration mode and cycle.Then we view the frequency band of the vertical drift to determine if the stiffness of the cable stayed bridge can meet the requirement.3.Carrying out the time history analysis of the cable stayed bridge under the seismic,then we get the displacement and deformation of each component under the seismic through existing seismic waves.4.By applying the moving vehicle loads,wind loads and the seismic waves,we carry out the excitation coupling analysis and view the law of its displacement and deformation.5.Based on the modal analysis,time history analysis and excitation coupling analysis we give the design method of the cable stayed bridge to provide the a meaning reference for practical engineering.