Numerical Simulations Of Fluid-structure Interaction For The Wind Field Distribution Around One Super-tall Structure And The Response Of The Structure

With the advance of science and technology, modern buildings have been on theway to be higher, more long span and more irregular. These emerging super-tall, largespan or highly irregular buildings are mostly sensitive to wind load, therefore thefluid-solid coupling effect between the buildings and wind is very conspicuous. It hasimportant academic value and wide application prospect to systematically investigatethe fluid-solid coupling effect between the buildings and wind.In this thesis, both rigid numerical wind tunnel and fluid-solid couplingnumerical wind tunnel of the super-tall residence are established on the finite elementsoftware platform base. The results of the two kinds of models are compared to eachother to summarize how the two-way fluid-solid coupling effect works on thedistribution of wind field around the building. Meanwhile, the along wind response ofthe building under wind is analyzed.The main contents are included as follows.(1)Based on consulting a number of related literatures and books at home andabroad, the background and significance of research topic were proposed. Meanwhile,the current situation of numerical simulation and fluid-solid coupling effect at homeand abroad was summarized.(2)The related theory of structural wind engineering and numerical simulationwas summarized.(3)The thesis established the finite element model of the building for modalanalysis and got the first-order vibration mode and frequency; established a simplifiedequivalent model of the building to solve the fluid-solid coupling numerical windtunnel; established the rigid numerical wind tunnel of the building; established thefluid-solid coupling numerical wind tunnel based on Fluent, Transient Structural andSystem Coupling on the ANSYS14.0Workbench numerical platform. (4) Compared the results of the two kinds of models, the thesis got the mainconclusions:①the two-way fluid-solid coupling numerical wind tunnel can beestablished based on Fluent, Transient Structural and System Coupling on the ANSYS14.0Workbench numerical platform;②the two-way fluid-solid coupling effecthas little effect on the basic rules of the distribution of wind field around the building;③the two-way fluid-solid coupling effect has some effect on the local distribution ofwind field around the building，especially the local distribution of wind pressure atthe top and on the back of the building，that means it is necessary to consider thetwo-way fluid-solid coupling effect;④the building’s shape coefficients, which areaverage values, getting little disturb from the two-way fluid-solid coupling effect forsome reasons, can be determined according to the load code;⑤stress on thewindward and leeward side of building is relative large and the stress concentrationphenomenon on the corner of the leeward side of building is most obvious.