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Title |
Evaluation of Rating Factor for Main Components in Steel Cable - Stayed Bridges
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Keywords |
Cable-stayed bridge ; Stress and stability equations ; Rating factor ; 사장교 ; 응력 및 안정검토식 ; 내하율 |
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Abstract |
The paper proposes rating equations for main components such as girders, towers and cables in cable-stayed bridges. Load rating equations for girders and towers are proposed using stress and stability equations and load rating equation for cables is presented. A moving load analysis is performed and distribution types of live loads are determined for the cases of a maximum axial tensile force, a maximum axial compressive force, a maximum positive and a negative moment for each component. The Dolsan Grand bridge is used to verify a validity of proposed equations, The conventional rating equation overestimates rating factors of girders and towers in the Dolsan Grand bridge, whereas proposed rating equations properly reflect the axial-flexural interaction behavior of girders and towers in cable-stayed bridges.
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