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Development and analytical verification of an inelastic reinforced concrete joint model

机译：非弹性钢筋混凝土节点模型的开发与分析验证

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摘要

Previous experimental research indicated that beam-to-column connections of reinforced concrete (RC) moment resisting frame structures experience considerable deformations under earthquake loading and these deformations have a major contribution to the story drift of the building. In current analysis and design applications, however, the connection regions are generally modeled as rigid zones and the inelastic behavior of the joint is not considered. This assumption gives rise to an underestimation of the story drifts and hence to an improper assessment of the seismic performance of the structure. In order to implement the effect of shear distortions observed in these regions into the seismic design and analysis of buildings, a model that represents their inelastic behavior needs to be developed. In this study, a parametric model that predicts the joint shear strength versus strain relationship is developed by investigating several previous experimental studies on RC beam-to-column connection subassemblies subjected to cyclic loading and establishing an extensive database. Based on this experimental database, parameters that significantly influence the joint behavior are determined by employing statistical correlation method and these key parameters are assembled to form a joint model. This model is then verified by comparing the results obtained from the dynamic earthquake analysis carried out by using Perform 3D with the experimental ones. Based on the verification results, it is observed that the analysis including the developed joint model improves the prediction of the seismic behavior.
机译：先前的实验研究表明，钢筋混凝土（RC）抗弯框架结构的梁对柱连接在地震荷载下会发生相当大的变形，而这些变形对建筑物的楼层漂移有重要作用。但是，在当前的分析和设计应用中，通常将连接区域建模为刚性区域，并且不考虑接头的非弹性行为。这种假设导致对层间位移的低估，因此对结构的抗震性能进行了不正确的评估。为了将在这些区域中观察到的剪切变形的影响应用到建筑物的抗震设计和分析中，需要开发一个代表其非弹性行为的模型。在这项研究中，通过研究循环荷载作用下钢筋混凝土梁-柱连接子组合件的若干先前实验研究并建立广泛的数据库，建立了预测接头抗剪强度与应变关系的参数模型。在此实验数据库的基础上，通过采用统计相关方法确定对关节行为有重大影响的参数，并将这些关键参数组合起来以形成关节模型。然后，通过将使用Perform 3D进行的动态地震分析获得的结果与实验结果进行比较，来验证该模型。根据验证结果，可以发现，包括已开发的联合模型在内的分析可以改善对地震行为的预测。

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