CAJ | 학술논문

为研究主桁整体节点构造的受力性能,结合在建沪通长江大桥,采用1:2的几何缩尺模型,对其关键节点 A60 进行了模型试验研究和有限元理论分析.试验结果表明:在最不利荷载工况下,节点区域最大应力在材料的容许应力范围内,验证了节点设计的安全性与可靠性;节点最大应力出现在焊接处和圆弧过渡段,主要是该处应力集中所致;采用适当半径的圆弧过渡形式,可有效减小应力集中.试验结果验证了沪通桥关键节点设计的合理性,也为类似工程节点设计提供了重要依据.
위연구주항정체절점구조적수력성능,결합재건호통장강대교,채용1:2적궤하축척모형,대기관건절점 A60 진행료모형시험연구화유한원이론분석.시험결과표명:재최불리하재공황하,절점구역최대응력재재료적용허응력범위내,험증료절점설계적안전성여가고성;절점최대응력출현재한접처화원호과도단,주요시해처응력집중소치;채용괄당반경적원호과도형식,가유효감소응력집중.시험결과험증료호통교관건절점설계적합이성,야위유사공정절점설계제공료중요의거.
In order to study the behavior of the integral joint structure of main truss,a 1:2 geometric scale model test and finite element analysis of key joint A60 in Hutong Changjiang River Bridge were conducted. Test results show that in the case of the most unfavorable load,the maximum stress in the joint zone is within the allowable stress, verifying its safety and reliability. T he maximum stress appears at welds and the circular arc transition section because of stress concentration,w hich can be effectively reduced by using the appropriate radius of circular arc transition form. The test results verify the rationality of key joint design of Hutong Changjiang River Bridge and may provide an important basis for similar projects.