The aim of the present study is to propose innovative predictive models for shear capacity of reinforced concrete (RC) exterior joints in terms of multiple soft computing techniques. Existing models were evaluated and by a preliminary sensitivity analysis, seven parameters including compressive strength of concrete, product of the yield stress and the reinforcement ratio of the joint stirrups, the effective width of the joint panel, cross‐sectional column width, beam tensile longitudinal reinforcement ratio, beam compressive longitudinal reinforcement ratio, and column longitudinal reinforcement ratio were considered. Then, a large data set having the details of experimental programs on shear capacity of exterior RC beam–column joints was provided. The experimental data were utilized in developing the proposed models. After verification of the new models against available database, their efficiency compared with existing models was confirmed. Finally, a sensitivity analysis was performed in order to find the relative importance of each input parameter on the shear strength of RC joints. The results indicated that the beam reinforcement is the most important factor in shear capacity estimation of exterior RC beam–column connections.

中文翻译：

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利用多种软计算技术估算钢筋混凝土梁柱组合件的抗剪强度

本研究的目的是根据多种软计算技术，为钢筋混凝土（RC）外部节点的抗剪承载力提出创新的预测模型。对现有模型进行了评估，并通过初步的敏感性分析，评估了七个参数，包括混凝土的抗压强度，屈服应力和接箍箍筋的增强比的乘积，接缝面板的有效宽度，截面截面宽度，梁的纵向拉伸强度考虑了钢筋配筋率，梁压缩纵向配筋率和柱纵向配筋率。然后，提供了一个大型数据集，其中包含有关外部RC梁柱节点的抗剪承载力的试验程序的详细信息。实验数据被用于开发提出的模型。在根据可用数据库验证了新模型之后，确认了它们与现有模型相比的效率。最后，进行了敏感性分析，以发现每个输入参数对RC接头抗剪强度的相对重要性。结果表明，梁加固是评估外部RC梁柱连接的抗剪承载力的最重要因素。