繰り返し載荷を受ける H 形鋼はりの復元力特性 : その 2・ランダム変位履歴における耐力の低下

概要

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In the preceding report, Part I, the following discussion was stated : When H-shaped steel beams are subjected to cyclic and reversed loadings with constant deflection amplitudes, load deflection hysteresis loops are stable within a certain critical deflection amplidute, while they become unstable beyond that deflection. However, the stationary hysteresis loops are again obtained, if the deflection amplitudes are reduced to within the critical one, even after the beams are damaged to deteriorate the strength. If the strength deterioration of the beams subjected to random deflections can be predicted from the results of the constant deflection amplitude tests, it is thought to be one of clues to prediction for failure of beams during an earthquake. Accordingly, in this paper how the strength of beams deteriorates due to various ratios of deflection amplitudes in the unstable deflection amplitude region is examined, and, based on those data, how to evaluate the strength deterioration of the beams subjected to random deflections is shown.
社団法人日本建築学会の論文
1978-03-30