模块化钢框架外套筒焊接连接节点的抗震性能试验研究OA

The seismic performance of inter-module joints is crucial to the overall structural safety.This paper proposes a welded inter-module joint(WIMJ).Through reversed loading tests on three WIMJ,the influence of outer sleeve height and thickness on their failure modes,stress distribution,ductile energy dissipation capacity and other seismic performance aspects was investigated.Additionally,the stiffnss of WIMJ was evaluated.The results indicate that the failure mode of WIMJ is beam-end bending failure,with the failure location primarily concentrated at the welded connection between the beam flange and the column.The hysteresis curves of WIMJ are relatively full,undergoing four force stages sequentially:initial slip,elastic deformation,elastoplastic deformation,and failure.The ductility coefficient of WIMJ ranges from 0.75 to 2.03,the equivalent viscous damping coefficient reaches up to 0.15,and the strength degradation coefficient ranges between 0.85 and 1.00,demonstrating good seismic performance.The influence of outer sleeve height and thickness on peak load-bearing capacity and ductile deformation capacity is minimal.The residual deformation curve of WIMJ exhibits a two-stage variation trend.WIMJ are classified as semi-rigid,partial strength connection joints.