钢筋混凝土梁柱节点最新抗剪通用分析模型的修正

研究目的:更好地在我国应用最近在美国混凝土学会的《结构学报》上发表的钢筋混凝土梁件节点抗剪通 用分析模型。 研究方法:通过整理我国的不同类型梁柱节点试验实测的抗剪承载力数据,对该抗剪通用分析模型进行了 检验和修正。另外对节点的配箍率、梁纵筋配筋率、轴压比等参数对于节点抗剪强度的影响趋势进行了分析。 研究结果:检验结果表明,虽然这个节点抗剪通用分析模型的预测结果与我国梁柱节点的试验数据相比基 本上符合,但也存在着根据该抗剪通用分析模型估算的节点抗剪承载力结果有时会明显偏于不安全。 研究结论:根据我国梁柱节点研究组的不同类型梁柱节点的检验结果,对该分析模型中几个系数提出了改 进的建议,修改后公式的计算结果与试验结果比较接近,且便于安全。

MODIFICATION OF NEWEST UNIVERSAL ANALYSIS MODEL FOR RESISTING SHEAR TO REINFORCED CONCRETE BEAM COLUMN NODE

Research purpose: It is for China to better apply the universal analysis model for resisting shear to reinforced concrete beam-column node lately published in "ACI Structural Journal" edited by American Concrete Association. Research method: The check and modification are made to this universal analysis model for resisting shear through summing up the experimental test data of resisting shear of different kinds of beam-column nodes in China. The analysis is made of the influences on shear strength of node by the parameters of ratio of hoop, ratio of reinforcement and ratio of axial pressure. Research result: The check result shows although the prediction result of this model basically conforms to the experimental data of beam-column in China, but some times the result of node shear strength estimated by this model is unfavourable for safety. Research conclusion: On the basis of the check results of different kinds of beam-column node got by the research team in China, the improvement proposals are given for three factors of this model. The prediction result of modified model is close to the experimental result and is favourable for safety.