CAJ | 학술논문

制作6个顶板与竖向加劲肋连接细节试件,考虑了焊缝熔透率和加载应力幅进行疲劳等幅加载试验。通过比较应力幅变化速率,研究了两种焊缝(角焊缝和全熔透焊缝)试件的疲劳性能,分析了疲劳性能衰退影响因素。分析结果表明：裂纹开展过程中,全熔透焊缝试件相对于角焊缝试件,其应力幅衰退变化更显著。试件疲劳裂纹开展至距离焊趾处10 mm 时,试件的疲劳性能衰退得较快；超过10 mm后,试件的疲劳性能衰退速率逐渐降低。该试验中,75%熔透率角焊缝试件的疲劳性能比全熔透焊缝试件的衰退得慢,75%熔透率角焊缝试件的疲劳性能比全熔透焊缝试件的好。
제작6개정판여수향가경륵련접세절시건,고필료한봉용투솔화가재응력폭진행피로등폭가재시험。통과비교응력폭변화속솔,연구료량충한봉(각한봉화전용투한봉)시건적피로성능,분석료피로성능쇠퇴영향인소。분석결과표명：렬문개전과정중,전용투한봉시건상대우각한봉시건,기응력폭쇠퇴변화경현저。시건피로렬문개전지거리한지처10 mm 시,시건적피로성능쇠퇴득교쾌；초과10 mm후,시건적피로성능쇠퇴속솔축점강저。해시험중,75%용투솔각한봉시건적피로성능비전용투한봉시건적쇠퇴득만,75%용투솔각한봉시건적피로성능비전용투한봉시건적호。
Six specimens of weld details between vertical stiffener and steel bridge deck were made.Constant amplitude fatigue test was conducted by considering melt penetra-tion rate and loading stress range.The fatigue performance was studied by comparing the stress range variation rate.And the influencing factors of the fatigue performance of specimens were analyzed.The results show that stress range of weld melt-through spec-imens declines more obviously than that of fillet weld specimens as the crack propaga-ting.The fatigue performance declines quickly before the crack reaching to 10 mm from the weld toe.After the crack exceeds 10 mm from the weld toe,the decline speed of the fatigue performance gradually decreases.In this test,the fatigue performance of fillet weld specimens with 75% penetration ratio declines slower than that of weld melt-through specimens.Therefore,the fatigue performance of fillet weld specimens of 75%penetration ratio is better than that of weld melt-through specimens.