鋼・コンクリート合成構造の耐震性能に及ぼす時間依存歪の影響

概要

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The purpose of this paper is to make clear the time-dependent effects on the earthquake-resistant capacities of steel and concrete composite frames. The method is a numerical analysis based on the nonlinear finite element method in which the concrete strain is defined as a sum of an elastic-plastic component and time-dependent components (basic creep, free shrinkage and stressinduced shrinkage). The numerical investigation has revealed that 1) the time-dependent effects could be ignored for the steelencased RC beam-column with the L_k/D of about 10 or less (L_k: the effective length, D: the depth of section) and for the CFT beam-column with the L_k/D of about 30 or less; 2) the time-dependent strains cause a rather remarkable reduction of the dissipated energy in the cyclic hysteresis than the reduction of the strength.
社団法人日本建築学会の論文
1998-06-30