点击次数：

论文类型：期刊论文

发表时间：2009-02-01

发表刊物：CONSTRUCTION AND BUILDING MATERIALS

收录刊物：SCIE、EI

卷号：23

期号：2

页面范围：865-871

ISSN号：0950-0618

关键字：GFRP ribbed rebars; Concrete; Pullout test; Bond strength; Optimal rib geometry

摘要：Ninety pullout specimens were used to study the bond behavior of glass fiber reinforced polymer (GFRP) ribbed rebars with thirty different specially designed rib geometries to the normal strength concrete. The test variables were the rebar diameter, rib spacing, and rib height. For each specimen, the bond failure mode, the average bond strength, the slip at the loaded end, the initial bond stiffness, and the bond-slip relationship curves were analyzed. It was found that the bond strength and bond-slip performance of these specially machined rebars varied with the combinations of rib spacing and rib height, alternatively known as the relative rib area(ratio of projected rib area normal to bar axis to product of nominal bar perimeter and center-to-center rib spacing). Based on analysis of the test results, design recommendations involving optimal rib spacing and rib height were made concerning optimum rib geometries of GFRP ribbed rebars with superior bond-slip performance. (C) 2008 Elsevier Ltd. All rights reserved.