摘要
随着不锈钢结构的广泛应用,不锈钢相贯节点越来越多地用于建筑结构中.然而,不锈钢圆管相贯节点的性能和设计方法却鲜有研究.考虑几何因素和弦杆预加载荷对节点承载力的影响,共对6个T形和3个Y形不锈钢圆管相贯节点,进行了支管受拉承载力试验研究.获得了材料性能、破坏模式、节点承载力和载荷-变形曲线.试验结果表明:T形、Y形节点的破坏模式相似,均为节点域弦杆的塑性变形.基于试验结果建立了节点有限元分析模型,经试验验证后进行了参数化分析,以研究支管受力状态对节点承载力的影响.数值分析结果表明:不锈钢圆管T形、Y形相贯节点支管受拉承载力始终大于支管受压承载力.基于国内外设计规范中支管受拉与支管受压T形相贯节点采用相同设计公式的背景,采用文献[15]提出的不锈钢圆管T形和Y形支管受压相贯节点承载力设计公式预测节点承载力,并与CIDECT计算结果对比.结果表明:CIDECT计算结果是偏保守的,文献[15]提出的公式具有良好的准确性.
With the widespread application of stainless steel structures,stainless steel hollow section joints in cold-rolled tubes are increasingly used in building structures.However,the performance and design methods of stainless steel circular tubular joints are rarely studied.A total of six T-joints and three Y-joints were tested considering the effect of the geometric configurations and the preload in the chord on the behaviors of the joint.The material properties,failure modes,joint strengths and load-deformation curves were all reported.The test results showed that the failure mode of T-joints,as well as Y-joints,was the plastic deformation of the chord at the panel zone.Based on the test results,the finite element analysis model of the joint was established,and the parametric analysis was carried out to study the effect of brace load on the joint strength.The results showed that the capacity of stainless steel T-and Y-joints in circular hollow sections with brace under axial tension was always greater than that of those with brace under axial compression.According to the background of using the same design formula for both the braces under axial tension and compression in the specifications at home and abroad,the capacity of the stainless steel T-and Y-joints in circular hollow sections was finally calculated by using the formula proposed in Ref[12]and compared with predictions using the CIDECT recommendations.The results showed that the CIDECT′s predictions were conservative and the formula proposed in Ref[12]had good accuracy.
作者
郑宝锋
吴步宸
张奎
王嘉昌
舒赣平
蒋庆林
ZHENG Baofeng;WU Buchen;ZHANG Kui;WANG Jiachang;SHU Ganping;JIANG Qinglin(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 210096,China;School of Civil Engineering,Southeast University,Nanjing 210096,China;China Northwest Building Design&Research Institute Co.,Ltd,Xi′an 710018,China;Jiangsu Dongge Stainless Steel Ware Co.,Ltd.,Jiangsu Yancheng 224000,China)
出处
《西安建筑科技大学学报（自然科学版）》
北大核心
2022年第4期508-516,共9页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金项目(51808110)。
关键词
不锈钢
圆管
T形节点
Y形节点
试验研究
有限元分析
设计方法
stainless steel
circular hollow sections
T-joints
Y-joints
test
finite element analysis
design
