変動軸力を受けるRC柱の二軸復元力特性に関する実験研究

概要

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This is an experimental study to understand two-dimensional restoring force characteristics of R/C columns under varying axial force based on consideration of analogy to the theory of plasticity. Four identical specimens were subjected to cyclic lateral load and varying axial force. Based on the test results, analogy to the theory of plasticity, and evaluation of rigidity degradation are studied. As the test results, when deformation increment vectors lie in the direction of loading on the condition that the columns yield, it can be said that plastic deformation increments calculated by experimental data and the plastic theory agree with the flow rule in direction. Elastic rigidity degrading ratio calculated by using the theory of plasticity and experimental data as numerical results agree with test result increases gradually during loading stage as stress decreases along the yield surface. On the other hand, when deformation increment vectors turn to the direction of unloading, stress increment vectors are widely different from vectors of elastic assumption. Rigidity degradation ratio on unloading stage of the column subjected to cyclic lateral loading under constant axial force decreases as cycles are repeated and lateral deformation increase, and shows tendency to be constant as more cycles are repeated.
社団法人日本建築学会の論文
2001-01-30