BFRP布层数与混凝土强度对BFRP布约束RC柱抗冲击性能影响  

Effect of the BFRP Fabric Layers and Concrete Strength on the Resistance of RC Columns Confined by BFRP Fabric

作　　者：詹界东[1] 赵继冲 宋康佳 李明政 滕振超[1] ZHAN Jiedong;ZHAO Jichong;SONG Kangjia;LI Mingzheng;TENG Zhenchao(School of Civil Engineering and Architecture,Northeast Petroleum University,Daqing 163318,Heilongjiang China)

机构地区：[1]东北石油大学土木建筑工程学院,黑龙江大庆163318

出　　处：《河南科学》2023年第12期1772-1782,共11页Henan Science

基　　金：黑龙江省自然科学基金联合引导项目(LH2020E018)。

摘　　要：BFRP布约束钢筋混凝土(RC)柱是以钢筋混凝土柱为核心、外部缠绕新型玄武岩纤维材料复合而成的组合结构.运用ABAQUS软件研究了在冲击荷载作用下,BFRP布层数、混凝土强度对BFRP布约束RC柱抗冲击性能的影响.结果表明:在冲击荷载作用下,增加BFRP布层数或增加混凝土强度均会使该类组合柱的接触力峰值增加、跨中位移减小,进而可有效提升其抗冲击性能;增加BFRP布层数或增加混凝土强度对混凝土强度较低、纵筋直径较大的组合柱的抗冲击性能提升效果显著,而对长细比较大的组合柱的抗冲击性能提升效果不是很明显;为了兼顾安全性与经济性,建议选择用于加固RC柱的BFRP布层数为2层.Reinforced concrete(RC)column restrained by BFRP fabric is a composite structure with reinforced concrete column as the core and new basalt fiber material wrapped around the outside.The effects of the layers of BFRP fabric and concrete strength on the impact resistance of RC columns restrained by BFRP fabric under impact loading were investigated using ABAQUS software.The results show that increasing the layers of BFRP fabric or increasing the concrete strength will increase the peak value of contact force and reduce the mid-span displacement of the composite column under the impact load,which can effectively improve the impact resistance of the composite column.Increasing the layers of BFRP fabric or increasing the concrete strength has a significant improvement effect on the impact resistance of composite columns with lower concrete strength and larger longitudinal bar diameter,whereas the improvement effect on the impact resistance of composite columns with larger slenderness ratio is not obvious.In order to take into account both safety and economy,two layers of BFRP fabric selected for the reinforcement of RC column is recommended.

关 键 词：BFRP布 RC柱 抗冲击性能 接触力 跨中位移 

分 类 号：TU389.9[建筑科学—结构工程] TU375.3