CFRP-钢管再生混凝土加固RC短柱轴压性能试验及有限元模拟  

Experiment and Finite Element Simulation for Axial Compression Performance of RC Short Columns Reinforced with CFRP-Recycled Concrete-Steel Tube

作　　者：陈华 张春裕 佘海涛 陈耀嘉 李甜 CHEN Hua;ZHANG Chunyu;SHE Haitao;CHEN Yaojia;LI Tian(School of Civil Engineering,Guangxi University,Nanning,China,530000;School of Civil Engineering,Nanning University,Nanning,China,530000;School of Civil Engineering,Guangxi University of Science and Technology,Liuzhou,China,545000)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530000 [2]南宁学院土木与建筑工程学院,广西南宁530000 [3]广西科技大学土木建筑工程学院,广西柳州545000

出　　处：《沈阳建筑大学学报（自然科学版）》2023年第1期62-70,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金重点国际(地区)合作研究项目(52220105005);广西高校中青年教师科研基础能力提升项目(2021KY1810)。

摘　　要：目的 研究碳纤维复合材料-钢管再生混凝土加固钢筋混凝土短柱的轴压性能。方法 对7根复合加固短柱以及1根未加固短柱进行轴压试验;利用有限元软件ABAQUS构建合理的模型,基于试验结果对数值模型进行验证;通过改变相应参数研究钢管厚度、钢管屈服强度和再生混凝土强度等级对复合加固短柱的影响程度,选出并修正适用于该构件的承载力计算方法。结果 复合加固作用下短柱的承载力约为原短柱的4倍,其易损部位主要发生在柱中及柱两端,增加钢管厚度,提高钢管屈服强度,提升再生混凝土强度等级均可提高短柱的极限承载力。结论 该加固方式能显著提高柱子承载力,试验值和有限元模拟值比较吻合,修正的承载力公式可以为此类构件的设计提供理论依据。In order to study the axial compression performance of short reinforced concrete columns reinforced with carbon fibre composite-steel pipe recycled concrete.Axial pressure tests were conducted on seven composite reinforced short columns and one unreinforced short column.A reasonable model was constructed using the finite element software ABAQUS,and the numerical model was validated based on the test results.In addition, the influence of steel tube thickness, steel tube yield strength and recycled concrete strength grade on the member was studied by changing the corresponding parameters.Finally, the load carrying capacity calculation method applicable to this member is selected and modified.The results show that the bearing capacity of the short column under the action of composite reinforcement is about 4 times that of the original square column, and its vulnerable parts mainly occur in the middle and both ends of the column;increasing the thickness of steel tube, the yield strength of steel tube and the strength grade of recycled concrete can improve the ultimate bearing capacity of the short column;it is concluded that this reinforcement method can significantly improve the bearing capacity of the column, the test value and the finite element simulation value are in good agreement, and the modified bearing capacity formula can provide the modified bearing capacity formula can provide some theoretical basis for the design of such members.

关 键 词：CFRP 短柱 再生混凝土 轴压 复合加固 

分 类 号：TU398[建筑科学—结构工程]