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首页> 外文期刊>ACI Structural Journal >Effectiveness of Reinforcement Details in Exterior Reinforced Concrete Beam-Column Joints for Earthquake Resistance
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Effectiveness of Reinforcement Details in Exterior Reinforced Concrete Beam-Column Joints for Earthquake Resistance

机译：外部钢筋混凝土梁柱节点的抗震加固细节

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This paper describes an experimental study of beam-column joints in frames common in preseismic code/gravity-designed reinforced concrete (RC) frame buildings. Exterior RC joint subassemblages were studied with four details of longitudinal beam bar anchorage and three details of transverse joint reinforcement. All these specimens showed low ductility and poor energy dissipation with excessive shear cracking of the joint core. Joint shear stresses greater than ACI-specified limiting values were mobilized in these small volume joints. The ACI standard hook for anchorage of the longitudinal beam bars and the suggested hairclip-type transverse joint reinforcement were found to be more effective. This combination of anchorage and joint reinforcement is easy to construct and can be used in moderate ductility demand situations.
机译：本文描述了在地震规范/重力设计的钢筋混凝土（RC）框架建筑中常见的框架中的梁柱节点的试验研究。研究了外部RC接头子组合件，其中四个细节是纵梁钢筋锚固，三个细节是横向接头钢筋。所有这些样品均显示出低延展性和差的能量耗散，以及接头核心的过度剪切裂纹。在这些小体积接头中，动员了大于ACI指定极限值的联合剪应力。发现用于锚固纵梁的ACI标准挂钩和建议的发夹型横向接头加固效果更好。锚固和接头加固的这种组合易于构造，并且可以在中等延性需求的情况下使用。

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