Study On Dynamic Response Of Building Structure Under Wind Load

With the rapid development of economy and urbanization,more and more high-rise buildings are emerging,and developing towards the trend of long and soft.However,the wind load caused by the wind load in the structural design becomes more and more prominent,and sometimes even the wind load plays a decisive role in the complex load effect combination.The stochastic characteristics and dynamic characteristics of wind load determine that the structure response is very complex.Simple calculation can not reflect the real wind state of the project.Therefore,in order to meet the requirements of safety,applicability and comfort of the building,it is of great significance to deepen the design concept of wind resistance and to carry out research work on the dynamic response of building structure under wind load.In this paper,wind-induced vibration response of shear-wall structure and frame-core tube structure is analyzed by simulating spatial wind field and engineering example.The main contents are listed as follows:(1)The deformation characteristics of shear wall structure and simplified structure of frame core-tube structure under wind load are analyzed.The finite element model is established with engineering examples,and the dynamic wind load is analyzed.The correctness of the theoretical analysis is verified by the obtained displacement response.(2)Based on the basic wind pressure statistical data of the project location,the wind field time history curve is obtained by using the linear filtering method to simulate the pulsating wind field in the real state.By adjusting the parameters of time and frequency,the simulation results meet the expected accuracy requirements.(3)The time-domain analysis of wind-induced dynamic response of buildings with shear-wall structure and frame-core-tube structure is made based on the same conditions of plane dimension,building elevation and load condition.From the displacement,velocity,internal force changes and other aspects of comprehensive analysis that frame-core tube structure of the building under the dynamic wind load is more stable.(4)Based on the original frame-core tube building model,the lateral stiffness of the frame and the core tube are adjusted respectively,and the wind-induced vibration response is compared and analyzed.It is shown that in this kind of structure,the increase of the rigidity of the frame part will have a greater effect on the control lateral displacement,but too much emphasis on increasing the stiffness will cause the wind acceleration and the component stress increase,which will reduce the comfort,Risk of structural damage.(5)Based on the original shear wall building model,the location of the shear wall is adjusted and the wind-induced vibration response is compared and analyzed.It is shown that the edge stiffness of the shear wall in this kind of structure will enhance the overall stiffness of the structure,which is beneficial to the lateral control of the structure,but is not conducive to controlling the wind acceleration and the bottom stress.