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尽管碳纤维复合材料(CFRP)加固在混凝土结构中的应用已经广泛报道,然而在钢结构尤其是管状钢结构中的应用相对较少。为研究CFRP加固的圆形管状钢支撑的性能,对CFRP包裹的热轧圆形空心钢支撑(88.9mm×4mm)进行试验,研究CFRP对整体屈曲性能的影响。基于试验结果,利用数值模型来预测构件考虑初始不平整度、材料和几何非线性的轴向承载能力、侧向和轴向位移。研究结果显示,CFRP层能够显著提高支撑的强度和刚度。
Although the application of carbon fiber reinforced plastic (CFRP) reinforcement in concrete structures has been widely reported, its application to steel structures, especially tubular steel structures, is relatively rare. In order to study the performance of CFRP reinforced round tubular steel support, CFRP wrapped hot rolled hollow steel support (88.9mm × 4mm) was tested to study the effect of CFRP on the overall buckling performance. Based on the experimental results, the numerical model was used to predict the axial bearing capacity, lateral and axial displacements of members considering initial irregularity, material and geometrical nonlinearity. The results show that the CFRP layer can significantly improve the strength and stiffness of the support.