预应力碳纤维布加固混凝土矩形柱侧向约束应力的研究  

Study on lateral restraint stress of rectangular concrete columns strengthened with prestressed CFRP sheets

作　　者：叶天帅 刘瑛[2] 梁丰[1] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]青岛理工大学管理学院,山东青岛266520

出　　处：《工程建设》2015年第5期14-18,共5页Engineering Construction

摘　　要：在普通碳纤维布约束素混凝土圆形截面柱侧向约束应力模型的基础上,推导出预应力碳纤维布约束素混凝土矩形截面柱的侧向约束应力公式,考虑到混凝土柱转角处容易形成应力集中,碳纤维布与混凝土接触的粘结力及由于材料性质不同引起的应力重分布等因素,引入相应的折减系数,使得加固体系侧向约束力由圆柱向矩形柱合理的过度,得出合理的预应力碳纤维布加固矩形柱侧向约束应力模型。Based on the lateral restraint stress model of the ordinary circular cross section concrete columns strengthened with CFRP sheets, the lateral restraint stress formulae of the rectangular cross-section concrete columns strengthened with prestressed CFRP sheets was deduced. By taking into the factors such as easy stress concentration of the reinforced concrete columns around the comer, the cohesive force between CFRP sheets and concrete columns and stress redistribution caused by differ- ent material properties etc. , the corresponding reduction factor was introduced, mak- ing a reasonable transition of lateral restraint stress from cylinder to rectangular col- umns, and thus the lateral restraint stress model of rectangular concrete columns strengthened with prestressed CFRP sheets was obtained.

关 键 词：侧向约束应力 碳纤维布 影响因素 

分 类 号：TU375.3[建筑科学—结构工程]