BOND BEHAVIOR OF GFRP BARS EMBEDDED IN NORMAL STRENGTH CONCRETE AND BASALT FIBER REINFORCED CEMENTITIOUS COMPOSITE
Glass fiber-reinforced polymer(GFRP)bars have been used as a viable alternative to steel reinforcement to overcome the corrosion problems in reinforced concrete(RC)structures especially those subjected to harsh enviorments.However,the GFRP bars have different characteristics compared to steel that influence their bonding behavior to concrete.Also,fiber reinforced cementitious composites(FRCC)have been used in many structural applications such as bridge deck slabs,industrial buildings and airfield pavements to improve their structural performance as well as their durability.It is well-documented that the bond between the reinforcing bars and surrounding concrete is an essential factor in the design and performance of RC elements.In this study,pull out tests were conducted on concrete prisms to evaluate the bond strength of GFRP bars according to the type of concrete(normal strength concrete NSC,or FRCC),bar diameter and bar end anchorage type of the GFRP bars(straight-and headed-end bars).Two modes of failure were observed; bar pull out for straight-end bars and splitting of concrete and head for headed-end bars.Also,test results revealed that the bond strength of the GFRP bars embedded in the FRCC was significantly higher than that of the corresponding GFRP bars embedded in NSC.Moreover,in straight-end GFRP bars,the bond strength increased with increasing the bar diameter.On the other hand,the pull out capacity of the headed-end GFRP bars decreased with increasing the bar diameter.
Bond strength Basalt fibers pull out headed-end bars Fiber reinforced composite
Karam Mahmoud Mohamed T.Bassuoni Ehab El-Salakawy Mohammed El-Gendy
Dept.of Civil Engineering,University of Manitoba,Winnipeg,MB,Canada
国际会议
新加坡
英文
1-4
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）