鋼部材 이음部의 疲勞擧動에 關한 基礎的 硏究

• 영문명: A fundamental study on the fatigue bahavior in the joints of steel members
• 발행기관: 강원대학교 산업기술연구소
• 저자명: Lee Yong Jae(李鎔滓) Chung Yeong Wha(鄭榮和)
• 간행물 정보: 『산업기술연구』vol.9, 21~28쪽, 전체 8쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 1989.09.30

영문 초록

For the study of the fatigue behavior, high-strength bolted connections on a small scale were manufactured, and carried on fatigue tests. Its experimental values were analysed by stress-fatigue life (S-N) curve. Three types of specimens : the base metal, the cireular hole and the welded sperimens had same net section were made. Through the same tests those experimental values were compared with those of the high-strength bolted conneetions. The results of these studies are as followings. It was found that the fatigue strength in Fn=100,000 and Fn=2,000,000 of the high-strength bolted conneetions were much more about 14% and 16% than that of the base metha specimen. It was thought that this trend was due to frictional force increasing fatigue strength. It was known that fatigue strength in Fn=100,000 and Fn=2,000,000 of the welded joints were less 29% and 21% than that of base metal specimen. It was thought that that trend was due to weld flaw. It was appeared that the fatigue strength in Fn=100,000 and Fn=2,000,000 of the high-strength bolted connections were much more about 38% and 30% than that of welded joint. It was thought that it was due to both frictional force increasing the fatigue strength in bolted connections and weld flaw decreasing the fatigue strength in welded connections. It was found that the fatigue strength in Fn=100,000 and Fn=2,000,000 of the B3 specimens were much more 2% and -2% than that of the B4 specimen. It was thought that that trend was due to the frictional force, which concerned with shape of specimen. It was known that the fatigue strength in Fn=100,000 and Fn=2,000,000 of the specimen with circular hole was less 61% and 65% than that of base metal. It was known that the allowable stress for bolted joint was higher than that of welded Joints. If that research is continued and more data are accumulated it can be expected that a basic pattern to provided the indicator of the fatigue design of the bolted connections of steel structures and persume the safety and lifeproof of existing structures is given.

목차

ABSTRACT

1. 序論

2. 實驗

3. 結果 및 考察

4. 結論

參考文獻