Experimental Study On Wind-induced Vibration Of Ridge-valley Membrane Structure

Membrane coverings, which are lightweight and flexible, are sensitive to wind. However, due to its special performance, to date there isn't an accurate wind-resistance design theoretical system. The gap, between related theory and wide application, is so great that wind damage to membrane structures continues to receive growing attention from researchers and engineers.The subject of wind-induced vibration has been undergoing theoretically and experimentally. Especially reduced scale model wind tunnel test is most popular among experimental investigations. While considerable rigid wind tunnel test research has been performed to investigate wind loads on such simple somatotype fabric structures, saddle type, umbrella type and so on, relative little work has been conducted on aeroelasticity of complicate somatotype roof buildings. This thesis aims at the ridge-valley membrane structure of Taizhou University Gymnasium. Corresponding rigid and elastic reduced model wind tunnel tests were conducted. Based on the investigation data, wind pressure distributions are discussed in detail in the rigid test, such as mean, root-mean-square (RMS) values of pressure coefficients, regional shape factors and so on. Meanwhile, according to the aeroelastic test investigations, the effect of azimuth and wind velocity on structural wind-induced response and the variations of cable force are also presented. Some conclusions are drawn in the hope that the findings will help further the understanding of the behavior of same somatotype buildings under wind load.Furthermore, using some typical membrane structure examples of wind damage for reference, some special suggestions on membrane structural design and wind-resistance design are offered.