CFRP加固钢筋混凝土梁受弯承载力分析
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摘要
碳纤维布加固混凝土结构技术是近年来建筑加固领域的一项新型加固技术。分别对未加固和用碳纤维加固的钢筋混凝土梁建立了有限元模型,应用ANSYS软件进行了非线性有限元分析,研究了其挠度变化和极限承载能力等,并与试验结果进行了比较,有限元分析结果与试验数据吻合较好。研究表明,碳纤维加固钢筋混凝土梁可以显著提高其抗弯承载力。验证了本文的有限元分析方法的正确性,可以为实际工程碳纤维布加固混凝土梁的模拟提供参考。
Nowadays,the technology of using carbon fiber to strengthen the concrete structure is a new method in the field of concrete structure reinforcement.The paper presents the finite element models of non-strengthened RC beams and CFRP strengthened RC beams respectively,analyses the nonlinear finite element by using ANSYS code,and conducts the research of characteristics of deformation and the ultimate load-bearing capacities for the beams.The comparison of numerical values with experimental data shows that finite element results are in good agreement with measured values.The research indicates that the load carrying capacity of RC beams strengthened with CFRP can be increased significantly compared with non-strengthened RC beams.It also shows that the finite element analysis method used in this paper is feasible and valuable in the further studies of RC beams strengthened with CFRP.
Nowadays,the technology of using carbon fiber to strengthen the concrete structure is a new method in the field of concrete structure reinforcement.The paper presents the finite element models of non-strengthened RC beams and CFRP strengthened RC beams respectively,analyses the nonlinear finite element by using ANSYS code,and conducts the research of characteristics of deformation and the ultimate load-bearing capacities for the beams.The comparison of numerical values with experimental data shows that finite element results are in good agreement with measured values.The research indicates that the load carrying capacity of RC beams strengthened with CFRP can be increased significantly compared with non-strengthened RC beams.It also shows that the finite element analysis method used in this paper is feasible and valuable in the further studies of RC beams strengthened with CFRP.
引文
[1]曾攀.有限元分析及应用[M].北京:清华大学出版社,2006.
[2]王吉忠,王苏岩,张海军.碳纤维布加固高强混凝土偏心受压柱受力性能的有限元分析[J].沈阳建筑大学学报(自然科学版),2009,25(3):442-450.
[3]李绍俊.基于ANSYS的碳纤维布加固的钢筋混凝土梁的有限元分析[D].沈阳:辽宁工程技术大学土木与交通学院,2005.
[4]王新玲,范建伟,王华.CFRP布加固损伤钢筋混凝土框架的抗震试验研究[J].世界地震工程,2009,25(3):119-123.
[5]张学辉.FRP增强纤维加固钢筋混凝土材料的实验研究和数值模拟[D].南京:河海大学土木与交通学院,2007.
[6]杜海强.碳纤维加固混凝土梁抗弯承载力研究[D].长沙:中南大学土木建筑学院,2007.
[7]李国,叶裕明,刘春山,等.ANSYS土木工程应用实例[M].北京:中国水利水电出版社,2006.
[2]王吉忠,王苏岩,张海军.碳纤维布加固高强混凝土偏心受压柱受力性能的有限元分析[J].沈阳建筑大学学报(自然科学版),2009,25(3):442-450.
[3]李绍俊.基于ANSYS的碳纤维布加固的钢筋混凝土梁的有限元分析[D].沈阳:辽宁工程技术大学土木与交通学院,2005.
[4]王新玲,范建伟,王华.CFRP布加固损伤钢筋混凝土框架的抗震试验研究[J].世界地震工程,2009,25(3):119-123.
[5]张学辉.FRP增强纤维加固钢筋混凝土材料的实验研究和数值模拟[D].南京:河海大学土木与交通学院,2007.
[6]杜海强.碳纤维加固混凝土梁抗弯承载力研究[D].长沙:中南大学土木建筑学院,2007.
[7]李国,叶裕明,刘春山,等.ANSYS土木工程应用实例[M].北京:中国水利水电出版社,2006.
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