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介绍轴压荷载下CFRP约束混凝土矩形短柱试验研究的结果。对三个系列的45个试件进行单轴试验,试验参数包括高宽比(横截面的长边与短边之比)、CFRP的层数。研究了试件轴向和横向的性能。试验结果清楚显示,约束混凝土柱增加的强度与未加固的原始柱相关,高宽比增加时,fcc/fco减少,当高宽比达到2时,高宽比的变化对fcc/fco没有影响。试验结果与现有的强度理论预测模型进行了比较,发现两者之间存在很大差异,需要建立新的模型。鉴于此,基于本次试验和相关文献的试验结果,提出FRP约束混凝土矩形柱的新的强度模型。
The experimental results of CFRP-confined concrete rectangular columns subjected to axial compression are introduced. Uniaxial tests were carried out on 45 specimens of three series. The test parameters included the aspect ratio (the ratio of the long side to the short side of the cross section), and the number of layers of CFRP. The axial and transverse properties of the specimen were studied. The experimental results clearly show that the increased strength of confined concrete columns is related to the unreinforced original column, and the fcc / fco decreases as the aspect ratio increases. As the aspect ratio reaches 2, the aspect ratio changes have no effect on fcc / fco. The test results are compared with the existing strength theory prediction model and found that there is a big difference between the two, and a new model needs to be established. In view of this, based on the test results of this experiment and related literatures, a new strength model of FRP-confined concrete rectangular columns is proposed.