| 種別 | Paper |
| 主題 | EXPERIMENTAL MODEL FOR IDEAL TENSILE FAILURE OF FRP RODS |
| 副題 | |
| 筆頭著者 | Hosam HODHOD（University of Tokyo） |
| 連名者1 | Taketo UOMOTO（University of Tokyo） |
| 連名者2 | |
| 連名者3 | |
| 連名者4 | |
| 連名者5 | |
| キーワード | |
| 巻 | 13 |
| 号 | 1 |
| 先頭ページ | 975 |
| 末尾ページ | 980 |
| 年度 | 1991 |
| 要旨 | INTRODUCTION FRP rods, with continuous fibers, have come into use as prestressing tendons for concrete due to their merits such as high strength, light weight and durability. However, there are still many uncertainties concerning their behaviours under different cases of loading. encountered in practice. The properties of the rods are direct consequence of their components properties and the components interaction. Hence, investigation of the single component behaviour under different cases of loading seems one basic approach to provide interpretation on the rods behaviour. The role played by each component differs depending on its sensitivity to the loading case in question. In practice, the rods might be subjected to static, dynamic and cyclic tensile loading. This research considers only the monotonic increasing static loading of the rods. The study aims at developing ideal stress-strain curve for the rods by testing single fibers of three different materials commonly used (aramid, carbon& glass). Due to the minute matrix participation (about 2%) to the rod strength, matrix strength is neglected in formulation and ideal relevant properties are assumed in order to establish the intended model. CONCLUSIONS 1. The stress- strain relationships for the three tested fibers are linear up to failure and all fibers have uniform geometry. Also, there is no strain rate dependence of the strength. 2. For further investigation of fibers behaviours through testing, the fiber holding material should be carefully chosen to account for the stress concentration at the chuck bolt. 3. Stress-strain relationships for FRP rods, under the ideal conditions of matrix plasticity and perfect bond, are linear up to failure. 4. The ideal properties assumed for matrix have hardly any effect on the linearity of the actual rod behaviour (that is also linear up to failure) for high fiber volume fraction. |
| PDFファイル名 | 013-01-1169.pdf |