T字型鋼管分岐溶接継手の二段多重振幅における疲労特性に関する実験的研究(構造・材料系)  [in Japanese] Fatigue Properties of Steel Tubular Joints under Two Step Block Amplitude  [in Japanese]

As a part of study on fatigue damage, in this paper, we have made two experiments employing steel tubular joints in order to predict fatigue life and examine miner's low. Two experiments are carried out as follow :1)the multiple repeated two-step stress-strain loading test in same damage proportion, 2)the multiple repeated two-step stress-strain loading test in different damage proportion, We investigate applicability of cumulative fatigue damage D from the experimental results, and the proposal of D-⊿N curve has made predicting fatigue life to these tests.