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借鉴方钢管混凝土柱-钢梁外肋环板节点形式,将非梁柱连接面的柱两侧外肋环板改为竖贴于柱侧的竖向肋板并伸出与梁翼缘焊接,同时设置锚固腹板,形成复式钢管混凝土柱与H形钢梁连接节点。通过7个梁柱组合体试件的低周反复荷载试验,分析各试件的破坏过程及特征,并对试件的滞回性能、承载力、延性、耗能能力和承载力及刚度退化等抗震性能进行研究。研究结果表明:节点的破坏形态基本相同,梁端先屈曲,形成塑性铰;锚固腹板可有效提高节点的承载力和变形能力;竖向肋板外伸长度可提高试件的初始刚度,使梁端塑性铰外移,有效保护节点核心区;试件的滞回曲线呈明显的梭形,具有良好的承载力、延性及耗能能力;试件在整个加载过程中刚度退化现象明显,承载力退化很小,可应用于抗震设防地区。
Draws on the steel tube concrete column - steel beam outer ring ring plate node form, the non-beam column connecting surface of the column on both sides of the outer ring ring plate attached to the column side of the vertical rib and extends and beam flange welding, while setting Anchorage web, forming a double-column concrete column and H-beam connection node. Through the low-cycle repeated loading test of 7 beam-column combination specimens, the failure process and characteristics of each specimen were analyzed, and the hysteretic behavior, bearing capacity, ductility, energy dissipation capacity and bearing capacity and stiffness degradation Seismic performance research. The results show that the failure modes of the joints are basically the same, the ends of the beams buckle first and form the plastic hinge. The anchorage webs can effectively increase the bearing capacity and deformation capacity of the joints. The extension of the vertical ribs can increase the initial stiffness of the specimens, The plastic hinges move outwards and effectively protect the core area of the joint. The hysteresis curve of the specimen shows a fusiform shape with good bearing capacity, ductility and energy dissipation capacity. The stiffness degradation of the specimen is obvious during the whole loading process, and the bearing capacity degenerates Very small, can be applied to earthquake fortification areas.