摘要
选取3个单变双角钢过渡节点作为研究对象,制作8个过渡节点模型,将其中6个足尺试验模型分别在受拉和受压工况下进行弹性加载试验,2个缩尺试验模型分别在受拉和受压工况下进行破坏加载试验,结合有限元模拟,分析单变双角钢过渡节点的力学特性和受力情况。数值模拟了弹性和破坏加载工况下单变双角钢过渡节点关键部位的应变变化和应力分布,并与加载试验进行对比。考虑上、下靴板之间的偏心距对单变双角钢过渡节点水平板上水平应力不均匀分布的影响,基于有限元模拟和加载试验,对现有的不同单变双角钢过渡节点水平板厚度计算方法进行比较与评估,通过与水平板设计厚度进行对比,分析不同计算方法的优化效果和安全裕度。结果表明:上、下靴板与水平板连接焊缝的偏心距是影响水平板受力的主要因素,水平板上对应上、下靴板的十字交汇处水平应力最大,并向四周扩散且逐渐减小;有限元模拟结果与试验结果吻合良好,研究结果可为单双角钢过渡节点的结构设计提供指导。
Three single-double angle steel transition joints were selected as the research objects,eight transition joint models were fabricated.The elastic loading tests on six full-scale test models were carried out under tension and compression conditions respectively.The failure loading tests on two scale test models were carried out under tension and compression conditions respectively.Combined with finite element simulation,the mechanical properties and stress of single-double angle steel transition joint were analyzed.The strain variation and stress distribution of the key parts of the single-double angle steel transition joint under elastic and failure loading conditions were numerically simulated and compared with the loading test.Considering the influence of the eccentricity between the upper and lower shoe plates on the uneven distribution of horizontal stress on the horizontal plate of single-double angle steel transition joint,based on finite element simulation and loading test,the existing calculation methods of horizontal plate thickness of different single-double angle transition joints were compared and evaluated.By comparing with the design thickness of horizontal plate,the optimization effect and safety margin of different calculation methods were analyzed.The results show that the eccentricity of the connecting weld between the upper and lower shoe plates and the horizontal plate is the main factor affecting the stress of the horizontal plate.The horizontal stress at the intersection of the corresponding upper and lower shoe plates on the horizontal plate is the largest,and it diffuses around and gradually decreases.The finite element simulation is in good agreement with the experimental results,and the research results can provide guidance for the structural design of single-double angle steel transition joints.
作者
徐再根
郑为东
刘俊才
刘文棚
田利
XU Zai-gen;ZHENG Wei-dong;LIU Jun-cai;LIU Wen-peng;TIAN Li(Shandong Electric Power Engineering Consulting Institute Corp.,Ltd.,Jinan 250013,Shandong,China;School of Civil Engineering,Shandong University,Jinan 250061,Shandong,China)
出处
《建筑科学与工程学报》
CAS
北大核心
2022年第2期69-77,共9页
Journal of Architecture and Civil Engineering
基金
国家自然科学基金项目(51778347)
山东大学青年学者未来计划项目(2017WLJH33)。
关键词
单变双角钢过渡节点
加载试验
力学特性
偏心距
single-double angle steel transition joint
loading test
mechanical property
eccentricity
