The Numerical Simulation Of Wind Pressure On The Wall And Wind Environment At Pedestrian Level Of A Tour-Tower On The Sea

Wind load is a kind of important loads in the design of structures. With the appearance of large-span roofs and high-rise buildings, it becomes more and more important to measure the distribution of the wind pressure on the surface of buildings. That's to say, it is much important to measure the wind pressure coefficient of the surface of buildings. At the same time, with the development of quality of life and enhancement of the concept of health, wind environment research of the pedestrian level around buildings also has very important practical significance, and it becomes one of the important factors to city planning and building design.Currently, there are three methods for research of wind loads on buildings and wind environment: field measurement, wind tunnel test and numerical simulation. In this thesis, taking a sea tour-tower for example, we use wind-tunnel test and numerical simulation method to measure wind pressure on the wall surface and evaluate the wind environmental around pedestrian Level.In wind-tunnel test, we make the model of the tower according to a certain reduced scale proportion, to simulate atmospheric boundary layer of the site, mainly to simulate the profile of wind speed and the profile of turbulence intensity. We adjust the roughness elements and spires to achieve the goal. We do wind tunnel test at different wind direction, gather the data of wind pressure, and then we deal with the data, to achieve the average wind pressure coefficient of the wall according to various wind direction.This thesis focuses on the methods how to simulate wind loads on building surface: the simulation of atmospheric boundary layer, establish the three-dimensional model, selection of boundary conditions and so on. By numerical simulation, we achieve the distribution of wind pressure on walls and wind environment at pedestrian level around the towers.Finally, we compare the results of wind pressure between numerical simulation and wind tunnel test, and we sum up the surface pressure distribution of this type of structures to provide a reference basis for the design of wind resistance, which verify the correctness and effectiveness of the numerical simulation. We describe and discuss the criteria to measure the comfort of wind environment at pedestrian level around buildings. By numerical methods, we achieve good curves of average wind velocity at pedestrian level.