Wind-induced vibration of a long span space truss structure
In this paper, characteristic of wind-induced vibration of a a long span space truss structure was studied. Wind tunnel test was conducted in a boundary wind tunnel, based on which displacement along Z direction under all wind directions are discussed, and vibrations of typical nodals are emphasized. It is shown that the upwards corner of the roof may course greater peak displacement in this area than that in other areas. On the other hand, modal vibration of part area may be much greater than that of others, which may enhance the danger of local wind induced structural damage of these areas.
Experimental Investigation on Characteristics of Wind Load on Large Span Roof
Based on wind tunnel investigation of the extension of the building for Shenzhen High tech Trade Convention, the characteristics of average wind pressure and fluctuating wind pressure distributed on the large span and low rise roof are investigated in this paper. The wind differential pressure coefficients and power spectra density (PSD) of some typical locations of the roof situated in high turbulent regions are analyzed. The suction located on the roof′ s windward corners can reach very high values, and the PSD of typical location has some special features that may be related to vortex shedding. The results given by this paper might be a significant guide for structural design.
Simulation of an adiabatic urban boundary layer in a wind tunnel
Abstract The adiabatic boundary layer appropriate to flow over an idealised urban terrain has been simulated using a modified version of the system previously used to produce a rural boundary layer simulation. Where possible, measurements in the simulated flow were compared with full-scale measurements and reasonable agreement was obtained. However, because of a general lack of measurements in urban areas, several assumptions had to be made concerning the characteristics of some of the flow properties. It is concluded that the characteristics of the simulated boundary layer are consistent with the interpretation of the available full-scale measurements.