IMPROVEMENT MEASURE ON ASEISMIC BEHAVIOR OF SPECIALLY SHAPED COLUMN JOINTS UNDER CYCLE LOADING
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摘要: 在节点核心区加入T形钢骨、槽形钢骨或X形配筋以改善异形柱节点这一薄弱部位,研究往复荷载作用下异形柱框架节点的抗震性能,对比不同改善措施对节点的破坏特征及承载性能、滞回性能、耗能能力及累积损伤等抗震性能指标的影响。结果表明：在异形柱节点核心区加入T形钢骨、槽形钢骨或X形配筋均能改善异形柱节点的滞回特性,提高节点的承载能力和变形能力,减缓节点的累积损伤程度,从而提高异形柱节点的抗震性能。与T形钢骨、槽形钢骨增强的异形柱框架节点试件相比,X形配筋对改善节点的抗震性能指标效果更显著。Abstract: The T-shaped steel reinforcement, groove-shaped steel reinforcement, or X-shaped reinforcement to the weak part of a specially shaped column joint is proposed. The aseismic behavior of a joint was investigated under low cyclic loading. The effect of different improvement measures on aseismic behaviors in terms of damage characteristic, bearing characteristic, hysteretic characteristic, energy dissipation and cumulated damage were analyzed. The results show that the hysteretic characteristic of a joint reinforced by T-shaped steel, groove-shaped steel or X-shaped reinforcement is improved, the bearing capacity and deformation capacity are enhanced and the degree of cumulated damage is lightened. Therefore, the aseismic behavior of a specially shaped column joint with T-shaped steel, groove-shaped steel or X-shaped reinforcement is improved. The aseismic behavior of a joint reinforced by X-shaped reinforcement is better than that of a joint reinforced by T-shaped steel, or groove-shaped steel.
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