湖南大学学报（自然科学版）2011，Vol.38Issue(1)：1-7,7.
PVA-ECC加固RC足尺梁二次受力试验研究
Experiment on Full-scale RC Beam Reinforced by Polyvinyl Alcohol-engineered Cementitious Composite Mortar in Flexure Subjected to Secondary Load
摘要
Abstract
An experiment study was conducted on the flexural behavior of reinforced concrete beam strengthened by Polyvinyl Alcohol-Engineered Cementitious Composite (PVA-ECC) mortar subjected to secondary load.Based on the comparison between test results of seven beams reinforced by PVA-ECC steel mesh and one general beam, the effect of once-loading extent and height of reinforcement at the side of RC beam on the flexural strength and deflections capacity was investigated.Beams were reinforced with Ushape, and the crack distribution, load-max deflection, strain development of concrete and steel, etc.were measured.Test results have indicated that PVA-ECC steel mesh technology is an efficient method to reinforce RC beam, which can markedly increase the load-bearing capacity, section stiffness and crack-resisting behavior.In addition,when the height of reinforcement.at the side of RC beam is half of the beam’s height,the load-capability of reinforced RC beam changes slightly compared with the full height of reinforcement RC beam.Also, this technique can bring about considerable economic benefit.关键词
加固/聚乙烯醇纤维水泥/钢筋混凝土梁/二次受力/加固高度Key words
strengthening/ polyvinyl alcohol-engineered cementitious composite/ RC beam/ secondary load/height of reinforcement分类
建筑与水利引用本文复制引用
卜良桃,陈军,鲁晨..PVA-ECC加固RC足尺梁二次受力试验研究[J].湖南大学学报（自然科学版）,2011,38(1):1-7,7.基金项目
湖南省科技厅科研项目(2007CK3066) （2007CK3066）
