扩孔型T型钢梁柱连接节点抗震性能分析  

Seismic performance analysis of T-steel column-beam joints with slotted holes

作　　者：赵丽洁[1,2] 胡洋泽 王昊 Zhao Li-jie;Hu Yang-ze;Wang Hao(School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;School of Hydraulic Engineering,Tianjin Agricultural University,Tianjin 300384,China;School of Civil Engineering,Tianjin Chengjian University,Tianjin 300384,China)

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]天津农学院水利工程学院,天津300384 [3]天津城建大学土木工程学院,天津300384

出　　处：《工程抗震与加固改造》2024年第5期27-36,共10页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(52208193)。

摘　　要：高强螺栓连接的钢梁柱节点可通过增大螺栓孔的方式延续耗能来提升节点的抗震性能,为研究扩孔T型梁柱节点的抗震性能,对4个悬臂式T型梁柱节点低周往复加载试验展开数值模拟研究,利用ABAQUS中C3D8I实体单元建立有限元分析模型,分析T型连接件尺寸、螺栓规格、梁截面尺寸对扩孔T型连接节点的滞回性能、刚度退化及耗能性能的影响规律。结果表明:扩孔后的T型节点出现明显的滑移特征,滑移过程中可以耗散大量能量,4个扩孔T型梁柱节点的耗能能力均较常规孔节点有明显提升;对于初始转动刚度较低的常规孔构件,T型节点的耗能能力相对较弱,经扩孔处理之后,节点的耗能能力提升幅度更大;由于承载力机制的先后转变,扩孔之后的构件中期承载力小于常规孔构件,后期的极限承载力基本相同。The seismic performance of steel column-beam joints connected by high-strength bolts can be improved by increasing the bolt hole size to provide extended energy dissipation.In order to investigate the seismic performance of expanded-hole T-shaped columnbeam joints,a numerical simulation study was conducted on four cantilever T-shaped column-beam joints under low-cycle reciprocating loading.A finite element analysis model was established using solid element named C3D8I in software Abaqus.The influence of Tconnector dimensions,bolt specifications,and beam section dimensions on the hysteresis behavior,stiffness degradation,and energy dissipation performance of the expanded-hole T-shaped joints was analyzed.The results show that the expanded-hole T-shaped joints exhibit significant slip characteristics during the sliding process,dissipating a large amount of energy.The energy dissipation capacity of the four expanded-hole T-shaped column-beam joints is significantly improved compared to that of conventional-hole joints.For conventional-hole components with lower initial rotational stiffness,the energy dissipation capacity of the T-shaped joints is relatively weaker,but after the expansion-hole treatment,the increase in energy dissipation capacity is greater.Due to the sequential change in load-carrying mechanism,the mid-term load-carrying capacity of the expanded-hole components is lower than that of conventional-hole components,while the ultimate load-carrying capacity in the later stage remained essentially the same.

关 键 词：T型钢节点 长圆孔 抗震性能 有限元分析 

分 类 号：TU352.11[建筑科学—结构工程] TU398.9