新型BFRP布加固混凝土方柱轴压性能试验研究  

Experimental study on axial compression performance of new-type BFRP-confined square concrete columns

作　　者：沈惠军 郑和晖[1,2,3] 张峰 李自强 SHEN Huijun;ZHENG Hehui;ZHANG Feng;LI Ziqiang(CCCC Second Harbour Engineering Co.,Ltd.,Wuhan 430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan 430040,China;CCCC Highway Bridge National Engineering Research Centre Co.,Ltd.,Wuhan 430040,China)

机构地区：[1]中交第二航务工程局有限公司,武汉430040 [2]交通运输行业交通基础设施智能制造技术研发中心,武汉430040 [3]中交公路长大桥建设国家工程研究中心有限公司,武汉430040

出　　处：《复合材料科学与工程》2023年第9期106-111,共6页Composites Science and Engineering

摘　　要：针对提出的以环氧硅酸脂树脂为基体的新型BFRP,通过模型试验及理论分析,研究了新型BFRP对混凝土结构的加固效果,分析了包裹形式及层数对混凝土方形柱力学性能的影响。结果表明,新型BFRP布与CFRP布加固试件的加载曲线发展趋势基本一致,但BFRP加固效果相对较弱,全覆盖包裹2层时,两者轴压承载力提升幅值分别为28.45%和64.73%。现有规范对CFRP加固试件适用性良好,而对BFRP适用性很差,本文提出的计算模型可精确预测新型BFRP布加固柱轴压承载力。Aiming at the new-type BFRP based on epoxy silicate resin,the confined effect on the concrete structure was studied by model test and theoretical analysis.The influence of the wrapping form and the number of layers on the mechanical properties of the square concrete column was analyzed.The results show that the development trend of the loading curve of specimens confined by BFRP and CFRP is basically the same,but the confined effect of BFRP is relatively poor.Under the two layers of full coverage,the axial compression bearing capacity of the BFRP-confined specimens and the CFRP-confined specimens is increased by 28.45%and 64.73%,respectively.The existing specifications have good applicability to CFRP reinforced specimens,but poor applicability to BFRP.The calculation model proposed in this paper can accurately predict the axial compression bearing capacity of newtype BFRP-confined square concrete columns.

关 键 词：新型BFRP 加固 轴压试验 约束机理 承载力模型 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]