下路式および中路式鋼アーチ系橋梁の弾塑性面外座屈強度

抄録

Elasto-plastic out-of-plane buckling strength of through type and half-through type arch bridges are analyzed by a finite element method which is capable of considering finite displacements and yielding of materials. Examining the numerical results and using an analogy between an arch and a column, we propose a method to determine the slenderness parameter for arch bridges. A designer can use the slenderness parameter to obtain an ultimate stress for arches by substituting it into a column strength formula. The predictions by the proposed procedure are shown to be fairly good correspondence with all of numerical results.