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作 者:童乐为[1,2] 黄俊峰 王开元 吴宏磊 刘博 郑建敏 孙杰 TONG Lewei;HUANG Junfeng;WANG Kaiyuan;WU Honglei;LIU Bo;ZHENG Jianmin;SUN Jie(State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;Jiaxing Key Laboratory of High-performance and Functional Materials in Civil and Environmental Engineering,Tongji Zhejiang College,Jiaxing 314051,China;Tongji Architectural Design(Group)Co.,Ltd,Shanghai 200092,China;Longyuan Mingzhu Technology Co.,Ltd,Shanghai 201100,China)
机构地区:[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]同济大学浙江学院嘉兴市土木与环境高性能功能材料重点实验室,浙江嘉兴314051 [3]同济大学建筑设计研究院(集团)有限公司,上海200092 [4]龙元明筑科技有限责任公司,上海201100
出 处:《建筑结构学报》2023年第2期142-153,共12页Journal of Building Structures
基 金:科技部国家重点实验室基金课题(SLDRCE19-B-04)。
摘 要:为研究宽偏矩形钢管混凝土柱-H形钢梁小尺度外环板式连接节点的抗震性能,设计了5个柱截面尺寸为400 mm×200 mm的框架边节点和中节点梁柱组合体,考虑不同外环板尺寸、柱子单侧与双侧受弯、绕柱强轴与弱轴受弯等影响因素,对其开展拟静力试验,研究其承载力、延性、耗能、刚度与强度退化及外环板的应力分布等具体性能。结果表明:节点发生了梁翼缘与外环板焊接部位的局部屈曲、开裂和节点域柱腹板剪切破坏两种模式,除绕柱弱轴双侧受弯的梁柱组合体外,其余梁柱组合体呈现弱构件强节点的特性,具有良好的抗震性能;梁柱组合体绕柱强轴受弯时,单侧受弯及双侧受弯都具有良好的承载性能。对于宽扁矩形钢管混凝土柱-H形钢梁节点的外环板,采用比现行相关设计规范要求小的外伸宽度,在工程应用上是可行的。Hysteretic behavior of small-size outer ring plate joints between concrete-filled rectangular tubular columns with a wide flat section and H-shaped steel beams were carried out experimentally in order to develop the application of steel structure residential buildings. Five test specimens with 400 mm×200 mm column cross-sections were designed, taking into account the effects such as different sizes of outer ring plates, columns subjected to unilateral and bilateral bending, as well as bending around strong and weak axes of columns. Two types of failure modes, namely local buckling and cracking at the welded connection between beam flange and outer ring and shear failure at panel zone of column web were observed in the specimens. The behavior was investigated such as stress distribution in the outer ring, loading capacity, ductility, energy dissipation, stiffness, and strength degeneration. It is found that the joints have good earthquake resistance with a feature of weak components and strong nodes, except for the joint subjects to bilateral bending around a weak axis of the column. The joints have good performance regardless of unilateral or bilateral bending when they are under bending around a strong axis of the column. It is practicable to use smaller outer ring plates in engineering than the size required in the design specification for the joints between concrete-filled rectangular tubular columns with a wide flat section and H-shaped steel beams.
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