FSI Numerical Simulation And Analysis Of Large Space Corridor Steel Structure Under Wind Load

Large span steel structure nest shape complex belongs to the flexible structure, the rigidity of the nest is smaller than on both sides of the connection stiffness of the building, placed in the air when wind resistance design is very important. This structure under wind load is very sensitive. At the same time this kind of complex structure and rules of symmetrical buildings on the wind pressure coefficient is very difference. Therefore, in order to guarantee the structure during construction and the use of more secure, for large-span nest steel structure under the action of wind load, wind pressure distribution of the research is particularly important.Taking Fuxin "two venues with a heart" regard as the research background, the large span air corridor between museum and public activity center regard as the research object. Using finite element software ADINA, building structure and fluid field of the FSI model, the modal of the structure, different wind speed conditions and different wind load for dynamic analysis. Calculated displacement and wind pressure coefficient distribution under the condition of different wind load. Through the above research work, get the following conclusions:(1)Based on CFD, establish three kinds of working condition of wind speed and direction at six Angle under the action of wind pressure coefficient contour. Relatively even distribution of wind pressure coefficient on the surface structure, the overall performance for the compression of windward side is positive, the middle area is the largest, gradually reduced, leeside wind pressure coefficient is negative.(2) Analyze of three kinds of working condition of wind speed in different wind angle under the action of wind pressure coefficient distribution on the surface of the structure. The different wind speed wind pressure coefficient curves show the basic coincidence, that has nothing to do with wind speed, wind pressure coefficient distribution related to wind direction Angle. At the same time, further verify the correct line and reliability of wind pressure coefficient obtained.(3)Considering the influence of the slit effect on nest structure, analysis of different load conditions on the structure of the impact of the average wind pressure coefficient, windward side wind pressure value increased significantly, on both sides of the leeward wind pressure value change is more obvious.