Numerical Simulation Study Of Wind Pressure On And Wind Environment Around Structure

Wind load is a kind of important loads to the buildings, and it is indispensable in the structure design. Following the appearance of large-span roofs, high-rise buildings, it becomes very important to measure the distribution of the wind pressure on the surface of the buildings. At the same time, With the enhancement of people's consciousness about environmental protection and health ,the study about wind environment have social and real sense and become the one of factors in structure design. This thesis studies the wind pressure on the surface of high buildings and Wind Environment problem around long-span roof structures.PartⅠ,Ⅱ: It presents recent research findings of the computational wind engineering. Start off the practice of engineering, based on a great deal of the data and literatures, we first establish basic theory including the governing equations for the numerical prediction, governing equation discretization, boundary condition and iterative algorithm forsolution of discretized equations are then described in detail.PartⅢ: The high-rise buildings with different scales is simulated by FLUENT which is an analysis software of computational fluid dynamics, using the standard k-εmodel. Through comparisons with different test conditions we theoretically conclude and summarize the rule of the wind pressures on the surface of the high-rise buildings structure. The results can be the reference of the construction of buildings against typhoon. Comparisons between the results of the numerical simulation and the wind tunnel test of the building model are presented in detail, This demonstrates the accuracy and validity of the numerical method in real engineering.PartⅣ: criteria for evaluating the degree of comfort of the wind environment around Buildings are described and discussed. The large-span structure is simulated and the distribution of mean wind speed and rms wind speed for all case as contour maps and current findings. The wind environment in different areas around the large-span building is predicted and the degree of comfort of the environment is evaluated. Several proposals for improving the comfort of wind environment are presented at the same time.