Wind-induced Buffeting and Vibration Reduction Control Design of Qingshan Extra Large Span Cable-Stayed Bridge

Abstract

In order to reduce the maximum cantilever construction state and completed bridge state buffeting effect of Qingshan extra large span cable-stayed bridge, the vibration reduction control design of the bridge is carried out. Through the numerical calculation and wind tunnel test, the wind-induced response of the bridge is obtained, under the maximum cantilever construction state and completed bridge state. The vibration reduction control design of the two states is conducted. And the bridge comfort index is determined. The results show that the buffeting response of the main girder is larger under the maximum cantilever construction and the completed bridge state. MTMD is used to design the vibration reduction control of the bridge, and the MTMD reducing effect is obvious. After the vibration reduction control design, the bridge can meet the construction and bridge safety requirements.