A STUDY ON MECHANISM OF TORSIONAL RESISTANCE OF REINFORCED CONCRETE MEMBERS
A STUDY ON MECHANISM OF TORSIONAL RESISTANCE OF REINFORCED CONCRETE MEMBERS
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钢筋混凝土构件抗扭机理研究
DOI：
10.2208/jscej.1988.390_179
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
T. Okamoto
中科院分区：
文献类型：
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作者：
S. Nagataki;Seung Han Lee;T. Okamoto
为了预测纯扭转下钢筋混凝土元件的荷载变形响应，本研究提出了一个分析模型。在该模型中，考虑对角裂缝之间的混凝土支柱的压缩应力-应变曲线和拉伸应力-应变曲线处于平衡状态。然后进行实验来验证该模型的有效性。实验值和分析值非常一致，因此所提出的模型不仅能够预测强度，还能够预测整个加载历史过程中的扭转角度、钢材应变和混凝土应变。还发现混凝土保护层和配筋率对剪切流的变化有显着影响。
In an effort to predict the load-deformation response of reinforced concrete elements subjected to pure torsion, an analytical model is proposed in this study. In this model, compressive stress-strain curve and tensile stress-strain curve of concrete struts between diagonal cracks are considered in equilibrium. Experiments were then conducted to verify the validity of this model. The experimental and analytical values have been found to be in good agreement and the proposed model is thus capable of predicting not only the strength but also the angle of twist, the steel strains and the concrete strains throughout the loading history. The concrete cover and the reinforcement ratio are also found to have significant effect on the change of shear flow.