模块化钢框架外套筒焊接连接节点的抗震性能试验研究
宋海涛 , 王江涛 , 陈永旗 , 吴成龙 , 王永洪 , 李大壮 , 张庆华 , 蒿雨露
建筑钢结构进展 ›› 2026, Vol. 28 ›› Issue (03) : 71 -81.
模块化钢框架外套筒焊接连接节点的抗震性能试验研究
Experimental Study on Seismic Performance of Welded Connection Joints with Outer Sleeves of Modular Steel Frames
模块间节点的抗震性能对结构整体安全至关重要。文中提出了一种模块间焊接连接节点(简称WIMJ),通过对3个该类型节点开展往复加载试验,研究了外套筒高度和厚度对节点破坏模式、应力分布、延性耗能等抗震性能的影响,并对节点的刚性特征进行了评估。结果表明:WIMJ的破坏模式为梁端受弯破坏,破坏位置主要集中在梁翼缘与柱的焊接连接处;节点的滞回曲线较为饱满,受力过程依次经历初始滑移、弹性变形、弹塑性变形、破坏四个阶段;其延性系数介于0.75~2.03之间,等效黏滞阻尼系数可达0.15,强度退化系数介于0.85~1.00之间,展现出良好的抗震性能;外套筒高度和厚度对节点峰值承载力与延性变形的影响较小;节点的残余变形曲线呈两阶段变化趋势;WIMJ属于半刚性部分强度连接节点。
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.
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国家自然科学基金(52208482)
山东省自然科学基金(ZR2021QE046)
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