| 種別 | paper |
| 主題 | An Experimental Study on Bending Behavior of Partially Prestressed Concrete Members with Fiber Reinforced Plastic |
| 副題 | |
| 筆頭著者 | A. M. Anisul HAQE（Tokai University） |
| 連名者1 | M. TEZUKA（Oriental Construction Co.） |
| 連名者2 | T. YOSHIOKA（Oriental Construction Co.） |
| 連名者3 | S. YASUMOTO（Tokai University） |
| 連名者4 | |
| 連名者5 | |
| キーワード | |
| 巻 | 16 |
| 号 | 1 |
| 先頭ページ | 1203 |
| 末尾ページ | 1208 |
| 年度 | 1994 |
| 要旨 | 1. INTRODUCTION Fiber reinforced plastic (FRP) reinforcement is one of the most promising new developments for concrete structures. Members reinforced with FRP provide not only lighter structures but also more durable structures that are free of the deterioration caused by corrosion of steel. FRP consists of synthetic or organic high strength fibers, most of which are impregnated with a resin matrix. They are available in the form of grids, rods, and ropes for reinforced and prestressed concrete members. Reportedly FRP can be effectively used as a prestressing tendon rather than a nonprestressed reinforcement, because its modulus of elasticity is lower than that of steel reinforcement. Fully or almost fully prestressed concrete members essentially show undesirable behavior of time dependent deflection due to creep of concrete. In order to improve this phenomenon, a part of prestressing tendons can be replaced with nonprestressed reinforcement, that is, partially prestressed concrete (PPC). When FRP is used for reinforcement, crack width is not to be limited, because FRP is free of corrosion. To satisty the serviceability, however, deflection must be restricted. This paper presents an experimental study on bending behavior and flexural characteristics of partially prestressed concrete members reinforced with both or either of aramid FRP (AFRP) and carbon FRP (CFRP) as prestressing tendon or nonprestressed reinforcement. 5. CONCLUSIONS Conclusions obtained in this research are as follows: 1) Bond characteristics of CFRP strand are desirable for crack control. 2) CFRP strand reduces crack width comparing with AFRP braid, when they are used as nonprestressed reinforcement. 3) Bond characteristics of AFRP braid should be further investigated to estimate crack width. 4) While deflection by Branson's equation does not agree with experimental results, giving too small deflection, conventionally calculated results with assumption of the moment curvature relation, the idealized stress-strain curves of materials and the linear strain profile agree with experimental results. 5) A member prestressed with AFRP tendon and reinforced with CFRP nonprestressed reinforcement showed the best bending behavior, showing enough strength and ductility. |
| PDFファイル名 | 016-01-1201.pdf |