不同再生混凝土取代率与CFRP布层数高强方钢管再生混凝土柱轴压性能  

Axial Compressive Performance of High-strength Square Steel Tube Recycled Concrete Columns with Different Replacement Rates of Recycled Concrete and CFRP Layers

作　　者：詹界东[1] 梁晨光 赵继冲 滕振超[1] 李成武 马锦辉 ZHAN Jiedong;LIANG Chenguang;ZHAO Jichong;TENG Zhenchao;LI Chengwu;MA Jinhui(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》2024年第9期1298-1306,共9页Henan Science

基　　金：黑龙江省自然科学基金联合引导项目(LH2020E018)。

摘　　要：通过轴压试验和有限元数值模拟试验研究了在轴向荷载作用下,再生混凝土取代率、CFRP布层数对CFRP约束高强方钢管再生混凝土柱轴压性能的影响.结果表明:试件的峰值承载力和初始刚度会随着CFRP布层数的增加而提高,试件的延性则会随着CFRP布层数的增加而下降,且增加CFRP布层数可使试件中部环向变形的发展延后,进而可有效提升其轴压性能;提高再生混凝土取代率会降低试件的峰值承载力、初始刚度及延性,但其破坏形态与无取代试件类似.研究结果可为类似组合柱轴压性能的评价提供参考.Through the axial compression test and finite element numerical simulation test,the effects of the replacement rate of recycled concrete and the number of CFRP cloth layers on the axial compression performance of CFRP-constrained high-strength square steel pipe recycled concrete columns under axial loading were investigated.The results show that:the peak bearing capacity and initial stiffness of the specimen increase with the increase of the number of CFRP cloth layers,and the ductility of the specimen decreases with the increase of the number of CFRP cloth layers;The increase of the number of CFRP cloth layers can delay the development of circumferential deformation in the middle of the specimen,which can effectively improve its axial compressive performance;The increase of the replacement rate of recycled concrete will reduce the peak bearing capacity,initial stiffness and ductility of the specimen,but the damage pattern of recycled concrete replacement specimens is similar to that of the non-replacement specimen.The results of this study can provide a reference for the evaluation of the axial compressive performance of similar composite columns.

关 键 词：再生混凝土 CFRP布 钢管混凝土柱 轴压性能 

分 类 号：TU398.9[建筑科学—结构工程]