Shizhao Shen

Working Mechanism of Single-Layer Cable Net Supported Glass Curtain Walls:

In this paper experiments and numerical simulations were undertaken to investigate the working mechanism of single-layer cable net supported glass curtain walls. We brought out the feasible ways in which glass panels work in coordination with the cable net, and verified by experiments. A parameter study was used to analyze the influence of factors, such as cable pretension, severity of loading, cable diameter, glass thickness and glass mesh size, on how glass panels worked in coordination with the cable net. The results indicate that the bending stiffness of the glass panel has little effect on the deflection of the structure, and the stiffness contribution of glass panels to the structure is substantially decided by the glass face membrane action. This action depends on the deflections of the glass panel and cable net.

Effect of Non-uniform Solar Temperature Field on Cable-net Structure of Reflector of Large Radio Telescope-FAST

The effect of a non-uniform solar temperature field on the cable-net structure of the reflector of a five-hundred-meter aperture spherical radio telescope-FAST was analyzed using the thermal analysis module of ANSYS. The integral parametric finite element model of the reflector structure with its measured landform was built, and the boundary conditions of periodic air temperature, solar radiation, long-wave radiation and shadows of surrounding environment, etc, were computed at intervals of half an hour under a cloudless sky on a summer day, as one of the worst-case climate conditions. The transient structural temperatures were then analyzed under sunshine which lasted for several days with a rational initial structural temperature distribution until the whole set of structural temperatures converged to the results obtained the day before. The corresponding structural analysis was then carried out. The results indicate that the highest local temperature difference goes up to 11° and the maximum r.m.s. error of fitting of the reflector geometry is about 2.2mm.

NONLINEAR WIND-RESISTANT DESIGN METHOD FOR CABLE NET FAÇADES

Cable net facades are sensitive to the fluctuating wind loads due to their high flexibility, light weight, and small damping. Since the cable net facade is a new kind of structure with obvious geometrically nonlinear behavior, there is no proper corresponding wind-resistant design method. In this paper, first, the nonlinear random vibration theory is used to determine the wind-induced nonlinear response formulation of the cable net facade. Then, a nonlinear wind-resistant design method for the cable net facade is developed based on the structural response. Finally, the accuracy of this wind-resistant method is verified, and the scope of the application is discussed.