Numerical Simulation On Dynamic Respose For Wind-Induced Of High-Rise Building Structure

With the continuous development of our society and the rapid growth ofurban population in recent years, the demand for construction area is constantlyincreasing. However,the city’s land is very limited. As a result, high-rise buildingscome into being. Their height is constantly refreshed, their structure more and morediverse, their shape more and more complex. Furthermore, since the use of newmaterials which are high in intensity and low in weight makes the structure moreflexible, the wind load of the structure becomes one of the main factors whichcontrols the safety and comfortableness of high-rise structure. Therefore, when itcomes to high-rise structural design, the accuracy of wind load calculation becomesa popular concern, and artificial simulation of dynamic of structure is one of theeffective ways.In order to ensure that the wind load which is loaded on the structure isappropriate to the wind load which the structure actually bears, an accurate windload time-history which can be obtained through simulation is required. Wind loadtime-history is generally transformed from simulation-obtained wind speedtime-history. Through comparative study of the two different simulation methods ofwind speed time-history, the Davenport spectral density function is selected. InMATLAB software, programs simulate fluctuating wind speed time-history on anactual project location along various heights and verify the correctness ofsimulation-obtained results by spectral comparison validation. Based on therelation between wind speed and wind load, wind speed is transformed into windload time-history of structure. In SAP2000software, the finite element model of anactual engineering structure is established and the natural period, frequency andvibration graph of structure are obtained by modal analysis of structure. Thedisplacement and acceleration schedule response at the structure nodes of differentheights are obtained by the time-history analysis of structure under the effect ofsimulation-obtained wind load time-history. Based on the structure basicparameters obtained by modal analysis, specification method is used to calculate the equivalent static. Through the comparison of the obtained results ofspecification method and that of the finite element software analysis, features of thetwo calculation methods are analyzed and reasons for the differences of two resultsare studied. Some references are provided for the wind-resistant design of high-risestructure of similar structure form.