Numerical Simulation Of High-rise Building Under Wind Load Considering Fluid-structure Interaction

For hundreds of meters of high-rise buildings,the wind load under the action of strong winds is the structural safety control load,wind load and wind-induced vibration is one of the important concerns of high-rise building structural design.Wind and structure are coupled with each other.Based on the analysis of fluid-solid coupling theory,the coupling law of wind and structure is revealed from the physical essence,which is of great significance to the safety design and applicability evaluation of high-rise buildings.In this paper,a numerical simulation study of the response of the fluid-solid coupling to the building under the three-dimensional flow field is carried out.The main work:(1)Using the SST model,two kinds of grid partitioning schemes are selected,the grid independent test is carried out,the numerical simulation results are extracted and the numerical wind tunnel is checked,which provides a basic process for the tunnel verification.(2)The paper analyzes the building of single-standard high-rise building model(CAARC model).A one-way fluid-solid coupling simulation is carried out to calculate the maximum displacement of the building and the coefficient of wind load.The two-way fluid-solid coupling structure is built on the workbench platform,and the CAARC model is simulated by two-way flow-solid coupling in the three-dimensional flow field.The displacement time-history data are extracted to calculate the wind load coefficient in the fluid-solid coupling state.And compared with the calculated displacement value and the wind load body coefficient,the reliability of the fluid-solidcoupling method is shown.(3)The paper analyzes the interference effect of two CAARC standard high-rise building models in three typical positions,considering the effect of fluid-solid coupling.The wind pressure time history of the monitoring points at the height of the building 2H/ 3 is analyzed.The effects of the displacement of two buildings in the fluid-solid coupling state are compared.(4)Based on the equivalent model of high-rise buildings,the numerical simulation of fluid-solid coupling under high-rise buildings is carried out by using the existing platform.The fluid-solid coupling And calculate the coefficient of wind load in the elastic and rigid state of each building,and provide the basis for the calculation of engineering calculation.