獅子島架橋の振動特性とダンパー設置効果について

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  • DYNAMIC CHARACTERISTICS AND DAMPER INSTALLATION EFFECTS OF SHISHIJIMA BRIDGE

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Three span continuous steel cable-stayed bridge with a bridge length of 900 m is under consideration for the Shishijima bridge construction. We proposed a two-steel pipe edge beam structure using an open grating slab which can reduce the weight of the girder. We examined the static characteristics and earthquake resistance of the bridge structure. As an important result, it was proven that the base of the main tower cannot satisfy the earthquake resistance performance against level 2 seismic motion type I. As a countermeasure, we proposed to install displacement dampers in the direction of the bridge axis and we examined the earthquake resistance of this bridge.

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