摘要
通过对7根层内混杂纤维布(Intraply Hybrid Fiber Reinforced Polymer,IHFRP)加固混凝土梁的抗弯试验和21个加固混凝土柱的轴压试验,得到了纤维布加固梁柱构件的破坏形态、加固梁的载荷—挠度曲线和加固柱的应力-应变全曲线,探讨了不同混杂比例的IHFRP对钢筋混凝土梁和柱的承载力、刚度及延性的影响.试验证明:IHFRP加固梁具有显著的塑性变形能力和能量吸收能力,可有效提高梁的承载力、刚度及延性;IHFRP显著改善了柱的延性性能;建立了IHFRP约束混凝土柱强度模型,用于预测约束混凝土的强度值.
Based on the 4-point bending flexural test of 7 concrete beams and the axial compression test of 21 circular concrete columns, the failure modes of specimens, load-deflection curves of confined beams and stress-strain curves of strengthened columns were derived; and the effect of IHFRPs with different proportions on the beating capacity, the stiffness and the ductility of specimens were studied. The results show that the concrete beams strengthened with IHFRPs have excellent plastic deformation and energy absorption capacities; the capacity, stiffness and ductility of beams can be effectively improved by IHFRPs;the ductility of circular concrete columns can be enhanced noticeably. Based on experimental data, a strength model of concrete columns confined by IHFRPs has been established.
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2012年第1期93-102,共10页
Journal of Basic Science and Engineering
基金
国家自然科学基金项目(50978006)
"十一五"国家科技支撑项目(2006BAJ03A09-02)资助
关键词
层内混杂纤维布
抗弯性能
轴压性能
延性
intraply hybrid fiber reinforced polymer （IHFRP）
flexural behavior
axial compression behavior
ductility
