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首页> 外文期刊>Bulletin of Earthquake Engineering >Capacity models for shear strength of exterior joints in RC frames: experimental assessment and recalibration
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Capacity models for shear strength of exterior joints in RC frames: experimental assessment and recalibration

机译：钢筋混凝土框架中外节点抗剪强度的承载力模型：实验评估和重新校准

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摘要

Several theoretical models are currently available in the scientific literature for evaluating the shear capacity of both exterior and interior beam-to-column joints in reinforced concrete (RC) frames. A reasonably wide set of those models, based on either analytical or empirical formulations, has been summarised within a companion work. The present paper firstly presents a wide database which collects results obtained in about two-hundred experimental tests carried out on RC joints. Those results are employed for assessing the above mentioned capacity models by considering a set of experimental data much wider than those usually utilised in the original formulation of such models. Accuracy and reliability of the various models are measured by quantifying some statistical parameters actually describing the relationship between the experimental evidence and the prediction of the various capacity models under consideration. Three relevant classes of joints (namely unreinforced, under reinforced and code-compliant) are considered with the aim of emphasising that the various models perform in a rather different way when applied to those different classes. Finally, a possible recalibration of the various models is proposed with the objective of enhancing their predictive capacity with respect to both the database as a whole and the three classes of RC joints mentioned above.
机译：在科学文献中，目前有几种理论模型可用于评估钢筋混凝土（RC）框架中外部和内部梁至柱节点的抗剪承载力。伴随工作总结了基于分析或经验公式的相当广泛的那些模型。本文首先提出了一个广泛的数据库，该数据库收集了在钢筋混凝土接头上进行的约200次实验测试中获得的结果。这些结果用于评估上述容量模型，方法是考虑一组比这些模型原始公式中通常使用的实验数据宽得多的实验数据。通过量化实际上描述实验证据与所考虑的各种容量模型的预测之间的关系的一些统计参数，可以测量各种模型的准确性和可靠性。考虑了三个相关类别的接头（即，未加固，受加固和符合规范的接头），目的是强调将各种模型应用于这些不同的类别时，它们的表现方式完全不同。最后，建议对各种模型进行可能的重新校准，以增强它们对整个数据库和上述三类RC接头的预测能力。

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