铁道科学与工程学报2017，Vol.14Issue(2)：227-232,6.
冻融循环下预应力CFRP加固高强混凝土耐久性
Durability of high strength concrete strengthened with prestressed CFRP under freeze-thaw cycles
摘要
Abstract
The four-point bending test was conducted to investigate the effects of freeze-thaw cycles on the durability of high strength concrete strengthened with prestressed CFRP (carbon fiber reinforced polymer). Two group of prestressed specimens were setup, and the tension control stress were equal to 15% and 30% of the standard value tensile strength of the CFRP. Another group of specimens strengthened with non-prestressed CFRP. The effects of freeze-thaw cycles and prestress were elaborated on the load-deflection curves and failure model. The results reveal that freeze-thaw cycles will lead to the decrease of the carrying capacity of all specimens. And the effect is gradually increasing with the increase of tension strength. The failure modes of specimens with the maximum level of prestress transformed from debonding of interface between CFRP and concrete were caused by flexural-shear crack to shear modes.关键词
预应力CFRP/冻融循环/黏结性能/剥离破坏Key words
prestressed CFRP sheet/freeze-thaw cycles/bond behavior/debond failure分类
建筑与水利引用本文复制引用
洪雷,江海鑫,王苏岩..冻融循环下预应力CFRP加固高强混凝土耐久性[J].铁道科学与工程学报,2017,14(2):227-232,6.基金项目
国家自然科学基金资助项目(51378089) （51378089）
海岸和近海工程国家重点实验室基金项目(SI14-3-2) （SI14-3-2）
