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 column-beam 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 T-connector 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
Key words
T-steel node/slotted hole/seismic performance/finite element analysis
维普
万方数据