Temporary Stabilizing Measures during Construction of a Steel Composite 2-Edge Girder Cable Stayed Bridge

강합성 2주형 사장교의 시공중 내풍 안정성 확보 방안 연구

The bridge deck section composed of a concrete slab resting on two I-beam girders are known to be susceptible to flutter instability and vortex shedding. Moreover, the cable stayed bridge in construction is more vulnerable to wind rather than in service when the free cantilever construction method is applied. This paper describes the effect of the dynamic wind loads on the bridge during construction and the effect of alternative temporary stabilizing measures. Therefore, a series of wind tunnel tests and numerical analysis were carried out to determine if any countermeasures were required.