초록 열기/닫기 버튼

An experimental study was conducted to evaluate the structural behavior of L-type flange joints. For this, one L-type flange joint test specimen for a 5 MW wind tower was designed and manufactured, and the structural behavior of each structural element of the joint was observed under increasing external tensile load (Z). The results of the analysis showed that the test specimen has a safety factor of 40 % compared to the design requirements of IEC 61400-6. In addition, strain gauge recordings showed that the tower shell and bolt comprising the test specimen had already reached the yield state before the final failure mode of the bolt and nut. Also observed in this study was that the experimental results of this specimen were in better agreement with Petersen's model in terms of overall behavior than any of the prediction models reviewed in this study. It is noted that additional experimental study is necessary to observe failure patterns in the threads of the bolt and nut.