A Study On Equivalent Static Wind Load And Wind-induced Response Of Large Span Flexible Point Supported Glass Curtain Wall And Skylight

The wind resistance design for large span flexible point supported glass curtain wall and skylight under wind load is a noticeable problem in the structural design area. However, in Chinese Codes and Standards, there are no clear concept and criterion about the supported system of glass curtain wall and skylight; even there are some inconsistent statutes. Therefore, they can't be sufficiently applied to the engineering. Based on the theoretical achievements in frequency domain, the author proposed a new method to analyze the wind buffeting in time domain and new system to calculate equivalent static wind load of the large spatial flexible steel structure, and solve several actual projects to draw some good conclusions.The design of wind sensitive structures has most often been based on frequency domain calculations of the buffeting response. The main objection of the classical buffeting frequency theory has been the many inherent linearizations, as a simple mode superposition method demands linear structural behavior as well as a linear loading hypothesis. Thus, well known wind-loading non-linearties are lost, and the effects of deteriorating structural stiffness or increased damping at high wind velocities cannot be included. Time domain dynamic calculations give a convenient approach, which mainly include two aspects: the simulation of the wind load and non-linear finite element method.The author puts forward two methods of wind simulation. The first method concerns the simulation of the wind field from Davenport cross-spectra and coherence functions by use fast Fourier transforms and Monte Carlo simulation method; another coherent time series is got by aerorigid modeling wind tunnel testing, which turns the data of the measure points to be the wind load time series. Compare to the first method, the second one is more suitable for large span spatial steel structure. Moreover, after the architecture design of a project has been finished, the style and shape would be confirmed, but the structural style would have more than one kind. So the evaluation of each structural style is necessary; however, it is...