Abstract
The safety of steel construction building cannot ignore effect of wind load because of an increase in high-rise building. Therefore, fatigue damage by wind load is important issue for steel frame. Currently, Miner's law is used generally for estimation method of fatigue life when stress amplitude varies as actual load. However, the recent studies report that the estimation of fatigue life by using Miner's law tends to exaggerate fatigue life. Therefore, we investigated the effects of the difference of the number of the steps, the damage proportion and the turn to give about amplitude on fatigue life by carrying out fatigue test. According to these effects, we proposed estimation method of fatigue life.
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