Analysis Of The Wind-induced Vibration Response For Steel Bracing Dome

With emerging new forms of spatial structure, the development of spatialstructure is very dynamic. Professor Xue Suduo proposed steel bracing dome and hasapplied for a patent. It is a new formation of spatial structure, using rigid rod insteadof the lower cable (including the ring cable and inclined cable) of the cable dome. Thesteel bracing dome can overcome the limitations which the tension of the cable domeis controlled hardly, but also there will be no the problem which the upper networkshell of the suspendome is easy to instability. Therefore, it has broad prospects fordevelopment and more excellent performance compared with the two roof structure.Steel bracing dome is particularly sensitive to the wind load, which determinedby the characteristics of its light weight, large flexibility, small damp, and forming anoverall self-balancing system through the imposition of the initial prestress. Theaddition, because of the increase of the span, the structure gets more flexible. Then,the wind-induced vibration response of the structure is a key factor to control thedesign of the structural. Therefore, wind load is the main load on the design of thestructural.First of all, this article summarizes comprehensively and systematically thetheoretical points and difficult problems involved in the analysis of the wind-inducedvibration response. Then a solid theoretical foundation is laid for the analysis of thewind-induced vibration response of structure.Secondly, the procedures simulating horizontal and vertical turbulent wind speedare written by MATLAB on the basic principles of auto-regression (AR) method. Theprocedures consider the time and spatial correlation. Examples have been simulatedby the above procedure. The result shows a good degree of fit of the power spectraldensity function of time in the artificial simulation of the wind speed and the targetspectrum. Then, this program is proved to be correct.Then, according to the need of the wind-induced vibration response, thesimulated wind speed shift nodal forces which can impose on the structure. Then thestructure conducts the dynamic nonlinear analysis by ANSYS and obtains the windvibration response. The last, wind load factors of the displacement and internal forceare obtained with statistical analysis.The last, through parametric analysis of wind-induced vibration of the steel bracing dome, we got the variation of wind-induced vibration coefficient fordisplacement by the change landscape type, prestressing, span and span ratio. Andthen, on the premise that the span and span ratio change only, we fit the expressionformula of the average wind-induced vibration coefficient of steel bracing dome.