纤维编织网增强混凝土加固砖柱的受压性能  

Compressive Performance of Brick Columns Strengthened withTextile Reinforced Concrete

作　　者：田稳苓 李鑫波 周健 刘星昊 刘晓铮[2] TIAN Wenling;LI Xinbo;ZHOU Jian;LIU Xinghao;LIU Xiaozheng(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;Tianjin Jinbeier Construction Engineering Test and Testing Technology Co.,Ltd.,Tianjin 300401,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]天津津贝尔建筑工程试验检测技术有限公司,天津300401

出　　处：《华南理工大学学报（自然科学版）》2020年第9期34-42,70,共10页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51878238)。

摘　　要：为研究纤维编织网增强混凝土(TRC)加固砖柱的受压性能,进行了12个砖柱的轴压试验和8个砖柱的偏压试验,考察了纤维编织网层数、聚乙烯醇(PVA)纤维掺量及偏心距对加固效果的影响。结果表明:TRC能显著提高砖柱的承载力和变形能力,并改善其延性;砖柱承载力随着纤维编织网层数的增加而不断增大,但层数超过2层后,承载力相对提高率呈下降趋势;TRC基体中掺入PVA纤维后,TRC的加固效果进一步增强,加固柱的开裂荷载和极限荷载得到提高;PVA纤维体积掺量在0.5%左右时加固效果较好;偏心距对TRC环箍约束效应具有削弱作用,加固效果随着偏心距的增大逐渐降低。基于试验结果,提出了TRC环箍约束砖柱的轴压承载力计算方法,计算结果与试验结果吻合良好。To investigate the compressive performance of brick columns strengthened with textile reinforced concrete(TRC),12 brick columns were tested under axial compression and 8 brick columns were tested under eccentric compression.The influence of the number of textile layers,polyvinyl alcohol(PVA)fiber content and eccentric distance on strengthening effects were investigated.The results show that TRC can significantly improve the bearing capacity,deformability as well as ductility of brick columns.The bearing capacity of brick columns increases with increasing number of textile layers,but the relative increase rate of bearing capacity shows a downward trend when the number of layers exceeds 2.The strengthening effect of TRC can be further enhanced by adding PVA fiber into the TRC substrate,and the cracking loads and ultimate loads of strengthened columns are improved.The strengthening effect is better when the volume fraction of PVA fiber is about 0.5%.The eccentric distance has a weakening effect on the hoop restraining action of TRC,and the strengthening effect gradually decreases with the increase of the eccentric distance.Based on the test results,a calculation method for the axial bearing capacity of brick columns strengthened with TRC was proposed,and the calculation results agree well with the test results.

关 键 词：纤维编织网增强混凝土 加固 砖柱 轴心受压 偏心受压 承载力 

分 类 号：TU582.57[建筑科学—建筑技术科学]