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首先回顾了FRP材料的应用历史,指出采用FRP材料外贴/包裹混凝土方式加固既有结构的有效性和合理性。在对近年来国内外FRP约束混凝土柱研究成果总结的基础上,分析了国内外约束圆形、方形的混凝土柱体的应力、应变,本构曲线及相关参数的模型研究现状。在此基础上,指出了国内外研究成果中存在的问题,提出了有待改进的方向。
First of all, the history of the application of FRP materials is reviewed, and the validity and rationality of using FRP materials to reinforce the existing structures are pointed out. Based on the summary of the research results of FRP confined concrete columns at home and abroad in recent years, the current research on the stress and strain, constitutive curve and related parameters of circular and square constrained concrete columns at home and abroad are analyzed. On this basis, the problems existing in the research results at home and abroad are pointed out, and the direction for improvement is put forward.