装配式方钢管柱桁架梁连接节点试验研究
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摘要
为研究装配式方钢管柱桁架梁连接节点的力学性能,对两个足尺的试件分别进行了单调加载与往复加载试验,并对不同加载方式下的梁柱节点的力学性能进行对比,深入分析了该节点的破坏模态、承载力、延性等指标。结果表明两种加载方式下的节点破坏都始于腹杆,终于弦杆撕裂。可得出单调加载下的梁柱连接节点延性大于滞回加载下的延性,往复加载下的梁柱连接节点更容易进入屈服,且进入屈服后刚度退化较快的结论。在加载过程中节点域并未发生破坏,满足"强节点,弱构件"的抗震设计原则。
In order to study the mechanical properties of fabricated square steel pipe column truss beam connections,the monotone loading tests and the hysteretic loading tests were carried out on two specimens with sufficient size. The emechanical propertis of beam-column joints under different loading modes were compared. The failure mode,bearing capacity and ductility of the joint are analyzed. The results show that the joint failure begins with the web under both loading modes,and finally the chord was torn. The ductility of joints under monotone loading is greater than that under hysteretic loading,and the joint under hysteretic loading is more prone to yield,and the stiffness degradation is faster than before after the failure. There was no failure occurred in the joint region,which satisfies the seismic design principle of "strong joints and weak members".
In order to study the mechanical properties of fabricated square steel pipe column truss beam connections,the monotone loading tests and the hysteretic loading tests were carried out on two specimens with sufficient size. The emechanical propertis of beam-column joints under different loading modes were compared. The failure mode,bearing capacity and ductility of the joint are analyzed. The results show that the joint failure begins with the web under both loading modes,and finally the chord was torn. The ductility of joints under monotone loading is greater than that under hysteretic loading,and the joint under hysteretic loading is more prone to yield,and the stiffness degradation is faster than before after the failure. There was no failure occurred in the joint region,which satisfies the seismic design principle of "strong joints and weak members".
引文
[1]鲁秀秀,王燕,刘秀丽.钢结构装配式梁柱连接节点研究进展[J].钢结构,2016,31(10):1-7.
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[3]张建强,员建成,姜明珠.装配式方钢管柱座节点水平受弯承载力简化设计方法[J].钢结构,2014,29(7):44-47.
[4]刘学春,徐阿新,张爱林.模块化装配式斜支撑节点钢框架结构整体稳定性能研究[J].北京工业大学学报,2015,41(5):718-727.
[5]张爱林,赵亮,刘学春.装配式方钢管柱桁架梁节点单调加载试验研究[J].土木工程学报,2014,47(增刊2):169-174.
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[10]赵琅.梁端加腋型节点域箱形加强式工字形柱弱轴连接单调荷载试验研究[D].西安:长安大学,2014.
[11]马林.梁端加盖板节点域箱形加强式工字形柱弱轴连接单调荷载试验研究[D].西安:长安大学,2014.
[12]倪诗阁.结构延性系数的确定方法[J].建筑结构,1980,10(5):64-65.
[13]郭宏超,郝波,刘云贺,等.钢框架装配式再生混凝土墙结构抗震性能试验研究[J].工程力学,2018,35(1):172-181.
[2]夏军武,常鸿飞.钢框架柱带悬臂梁段拼接节点的弹塑性分析[J].中国矿业大学学报,2006,35(5):596-601.
[3]张建强,员建成,姜明珠.装配式方钢管柱座节点水平受弯承载力简化设计方法[J].钢结构,2014,29(7):44-47.
[4]刘学春,徐阿新,张爱林.模块化装配式斜支撑节点钢框架结构整体稳定性能研究[J].北京工业大学学报,2015,41(5):718-727.
[5]张爱林,赵亮,刘学春.装配式方钢管柱桁架梁节点单调加载试验研究[J].土木工程学报,2014,47(增刊2):169-174.
[6]刘学春,徐阿新,张爱林.模块化装配式高层钢结构节点静力性能分析与试验研究[J].工业建筑,2014,44(8):27-34.
[7]田金,RBS型节点域箱形加强式工字形柱弱轴连接单调荷载试验研究[D],西安:长安大学,2014.
[8]中国科学院工程力学研究所.地震工程研究报告集(第三卷)[M].北京:北京市建筑设计院,1978.
[9]倪诗阁.工程建设技术标准动态结构试验中屈服变形的确定方法[J].工业建筑,1996,26(8):45-50.
[10]赵琅.梁端加腋型节点域箱形加强式工字形柱弱轴连接单调荷载试验研究[D].西安:长安大学,2014.
[11]马林.梁端加盖板节点域箱形加强式工字形柱弱轴连接单调荷载试验研究[D].西安:长安大学,2014.
[12]倪诗阁.结构延性系数的确定方法[J].建筑结构,1980,10(5):64-65.
[13]郭宏超,郝波,刘云贺,等.钢框架装配式再生混凝土墙结构抗震性能试验研究[J].工程力学,2018,35(1):172-181.