Study On Dynaminc Load Response Correlation Method Of High-rise Buildings Based On Wind Tunnel Test

With the further development of economy and the continuous progress of engineering technology, super high-rise buildings have been growing rapidly in the first decade of new century.Based on the simultaneous pressure wind tunnel test, wind-induced responses and equivalent static wind loads of high-rise building are researched in this paper, and corresponding calculation frames are established. The research is summarized as follows:1) Charecter of wind loads on typical high-rise buildings are studied.Ten typical rigid models, whose side ritios are ranged from 0.25 to 4 and aspect ratios ranged from 4 to 9, of high-rise buildings are tested by simultaneous pressure wind tunnel test method. Basic characteristics of parameters are studied based on the test results, such as mean value, root mean square values and spectrums of local wind loads, overturning moments and torsion. Based on statistics of modeshapes and periods of lots of high-rise buildings, genralized forces caused by wind loads are studied. Finally, formulas are fitted for procedding research.2) Dynamic load-response correlation (DLRC) method of equivalent static wind load (ESWL) is presented. Equations are deduced base on the idea of load-response correlation method and equivalent wind excited vibration force. And by DLRC method, ESWL based on the non-principal axis direction equivalent target and multi equivalent targets is deduced. Calcultaion shows that compared with other methods for ESWL, DLRC method is characterized by wide application range and high accuracy of calculation.3) Along-wind loads and across-wind loads calculation methods are improved based on DLRC method. The new method improved calculation accuracy of along wind loads. Response spectrum method for across wind load which is similar to the earthquake action is presented based on DLRC method. Response spectrum method makes the concept of across wind load clear to engineers and makes calculation of across wind load more simple compared with other methods.4) Calculation method for combination coefficients of three components of wind load is proposed based on joint probability density distribution function and DLRC method.by the peak factor and combination factor, preliminary theoretical foundation for the further research on reliability is established.