Shear behavior of fiber reinforced concrete beams | |
| Author | Aye Su Sandar Kyi |
| Call Number | AIT Thesis no.ST-14-07 |
| Subject(s) | Reinforced concrete, Fiber--Testing Concrete beams |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-14-07 |
| Abstract | Short fibers have been used to improve properties of concrete for a very long period of time due to enhance tensile properties and ductility of concrete. An ability to prevent sudden failure of concrete is one of the most outstanding performances of the short fiber. Due to this reason, the use of fiber to prevent the brittle failure of concrete members is a major aspect that should be investigated. The shear failure is brittle in nature and may occur in many types of structural elements. The main objective of this thesis is to evaluate the performance of short fibers to improve the resistance against shear failure of concrete member. Steel fibers and aramid fibers are compared. The steel fiber used in this study is ‘hook-end steel fiber’ with length of 50 mm and aspect ratio of 67. The aramid fiber is 30 mm long with aspect ratio of 50. The shape of aramid fiber is straight since more complicated shape of the aramid fiber cannot be produced at the time of this study. The splitting tensile strength and ductility of concrete can be impressively improved by the addition of either aramid or steel fibers. The improvement is larger when the volume fraction of fiber is higher. The addition of short fibers also improved the shear capacity of the concrete beam substantially. However, although the aramid fiber has higher stiffness and fiber strength, it could not achieve superior performance. This may be because worse bonding of aramid fiber. The fibers also act to distribute the damage. Due to this better distribution of damages induced by fiber, it was also found that the crack width and strain in the longitudinal reinforcement was substantially reduced |
| Year | 2014 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-14-07 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Pennung Warnitchai;Raktipong Sahamitmongkol; |
| Examination Committee(s) | Thanakorn Pheeraphan; |
| Scholarship Donor(s) | Ministry of Foreign Affair, Norway; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2014 |