GFRP筋增强ECC梁的抗弯性能研究  

Study on Flexural Behavior of GFRP Bars Reinforced ECC Beam

作　　者：郝瀚[1] 水中和[1] 郑又瑞 张潇[1] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《建材世界》2015年第2期35-38,共4页The World of Building Materials

基　　金：国家科技支撑计划课题(2014BAC01B02)

摘　　要：利用玻璃纤维增强聚合物(GFRP)筋取代钢筋作为混凝土结构增强筋可以有效解决侵蚀环境下钢筋锈蚀问题,但存在着延性不足的问题,结构常常呈脆性破坏。研究了GFRP筋高韧性水泥基复合材料(ECC)梁的抗弯性能,并与GFRP筋普通混凝土梁和钢筋混凝土梁进行对比,结果显示GFRP筋ECC梁在抗弯承载力和延性方面均优于GFRP筋普通混凝土梁,并且GFRP筋ECC梁具有类似于钢筋混凝土的塑性破坏特征,不同于GFRP筋普通混凝土梁的脆性破坏。GFRP筋与ECC具有良好的协同工作能力,并且两者均具有优异的耐久性能,因此在海洋工程、冬季撒除冰盐的公路与桥梁工程等领域具有广阔的前景。Using glass fiber reinforced polymer （GFRP）bars instead of steel reinforced concrete can effectively solve the problem of steel corrosion, but GFRP bars reinforced concrete exists the problem of insufficient ductility, as a re- sult of brittle failure. This paper investigates the flexural behavior of GFRP bars reinforced engineered cementitious composites （ECC） beams, and compares it with GFRP bars reinforced ordinary performance concrete and reinforced concrete beams. The results show that GFRP bars reinforced ECAE beams are obviously superior to GFRP bars rein- forced ordinary performance concrete in the bending strength and ductility, and GFRP bars reinforced ECC beams present plastic failure which is different from brittle failure that GFRP bars reinforced ordinary performance concrete beams present. GFRP bars and ECC have good ability of collaborative work, both of which have excellent durability, therefore, they have broad prospects in the field of marine engineering, road and bridge engineering which may experi- ence deicing salt.

关 键 词：GFRP筋 ECC 荷载-挠度曲线 延性 

分 类 号：TU377.9[建筑科学—结构工程]