Abstract
An application of concrete-filled steel tubes to main arch ribs is discussed based on 3-dimensional static and dynamic analyses of a prototype half through braced-rib arch bridge. The method for nonlinear characteristic assessment of a concrete-filled tube considering the composite action of steel pipe and concrete is proposed. Difference of the dead load stress in steel pipe arch ribs due to the different concrete-filling sequence is considered, and the safety evaluation of arch ribs is performed using both the allowable stress and the ultimate strength design method. The bridge performance during strong earthquake motions comparable to the Great Hanshin Earthquake is assessed in detail through a nonlinear time-history analysis.
