Wind-induced Vibration Response Research Of Single-layer Plane Cable Net Glass Curtain Wall

With the trend of high-rise and large-span, modern structural system becomemore beautiful, so effect of wind loading on the structure becomes more and moresignificant. As one of this kind of structure, the single-layer plane cable net glasscurtain wall structure is very prominent. At present, most of the engineering practicesin the frequency domain analysis method is used to calculate the single-layer planecable net glass curtain wall without considering the effect of gravity of hanging glasson the tension of vertical cable. But in fact, with the increase of the curtain wall,especially the increase of the vertical dimension leads to uneven distribution of thevertical cable prestresses. Thus, the rationality of the assumptions is rapidly reduced.The static figuration of the cable net glass curtain wall under average windpressure and self-gravity is the precondition of calculating the wind-induced vibration.The static equilibrium differential equations are solved through Galerkin method anditerative calculation, The difference of deformation results considering gravity factoror not and the trend that the difference becomes bigger with the increasing glassweight.The prestresses of the cable net glass curtain wall are uneven due to the glassweight, which result in different the modal characteristic. The natural frequencies andmode shapes are obtained by solving the oscillatory differential equation, Thedifference of the natural frequencies and mode shapes considering gravity factor or notare found and the trend that the difference becomes bigger with the increasing glassweight.The wind-induced response of the single-layer plane cable net glass curtain wallstructure are discussed in time domain and frequency domain. The effect of unevenprestresses of the vertical cable, generated by the glass weight, on the wind-inducedvibration is further discussed. By linear filtering method, wind velocity time-history issimulated, and then the displacements of the cable net glass curtain are obtained byconsidering gravity factor or not. The, analyses are further made in the frequencydomain analysis. The results from an example show that the displacements byconsidering glass gravity are closer than those of no gravity in the frequency domainanalysis, while compared with those in time domain. The differences of the resonantresponse increase with increasing glass weight. The change of resonance component leads to that of the gust response coefficient.