WIND TUNNEL STUDIES ON THE BEHAVIOR OF A HIGH-RISE BUILDING

摘要

The behavior of Chongqing International Exhibition and Convention Mansion under wind is systematically studied. The Mansion is a steel structure tall building, its height is 303m, and the first frequency of which is 0.1234Hz. To obtain the wind load and wind-induced responses and assess the living comfort and safety of the building, wind-tunnel model test is done in the turbulent boundary layer, which simulates the natural wind on the site of the Mansion. The distribution of wind pressure on every surface of the Mansion is measured by the static model, the static wind load is calculated. The wind-induced responses, including the displacements, acceleration and angular velocity responses, are measured by the aero-elasticity model. The dynamic wind load is also acquired. The effect of surrounding buildings and structures was discussed. It is shown, that the building's structural stiffness and dynamic properties, which is vibration period and damping, strongly affect the wind-induced responses of the building, and the surrounding buildings influence the distribution of wind pressure and wind load seriously, no galloping will occur under the design velocity, the acceleration and angular velocity on the top of the building is smaller than the allowance and the living comfort of the building meets the need of China national code.