Wind Load And Wind-Induced Response Analysis Of Tall Buildings With Complexity Shape

Along with the development of science and technology, the height of tall building increases constantly. Light and stiff building materials were used widely and at the same time there is lots of twin-tower or multi-tower tall building with complexity shape. Now investigation on wind reduced response of single tall building is gradually popular and there is little investigation on twin-tower or multi-tower tall building with complexity shape. Three-dimensional wind load and wind reduced response of twin-tower tall building with complexity shape are analyzed based on the Xiao Shan International Trade building in the paper.A wind tunnel test for twin-tower tall building rigid model is investigated and the results are gained using surface integral for engineering application convenient. Three-dimensional wind loads including along-wind, across-wind load and torsion moment under different wind direction are mainly discussed and interfering shape coefficient due to adjacent tower tall building and local shape coefficient are analyzed. Reasonable wind loads is provided for the design of wind resistance of twin-tower building.Based on the wind tunnel test, aerodynamic modal force spectrums of twin-tower tall building are studied using surface integral method of rigid model. Modal force spectrum of along wind and across wind and torsion including three modes are analyzed and compared with modal force spectrum of single tall building which are provided by literature. Modal force cross-spectrum and modal force correlation between along-torsion and cross-torsion are discussed under different mode.Wind induced displacement and acceleration response of twin-tower tall building having lateral-torsional uncoupled are analyzed using modal analyses method. The contribution of wind load's statistic correlation for total response is analyzed. Then the structural parameter and interfering of adjacent tall building effect on wind induced response are discussed.The wind induced response formula of tall buildings having no mass and stiffness centre is deduced. The rule of wind induced acceleration response is researched when mass and stiffness centre be at different position. The high mode effect on wind induced acceleration response is analyzed. Wind load's correctionarose from lateral-torsional coupled are discussed. Finally, the wind induced response is analyzed in time domain method.