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.
Wind loads on cantilevered roof structures
Abstract This paper summarises the most important findings of the first stage of a large-scale project to investigate the wind loading on cantilevered roof structures such as those typified by a large grandstand roof. Some results of a general study of the flow field for typical grandstand configurations and an investigation of likely critical cases for the occurrence of large mean loads are given. The important inter-relationships between roof slope, yaw angle and sub-roof area blockage are described. The likelihood of occurrence of near-periodic load fluctuations due to vortex shedding is shown to be low. The form of the spectrum of both local and overall loads has been studied, and the relationship to the free-stream turbulence is discussed.
Determination of the model scale factor in wind-tunnel simulations of the adiabatic atmospheric boundary layer
Abstract A process is proposed for determining the model scale factor in contemporary full-depth or part-depth simulations of the atmospheric boundary layer in a wind tunnel.