الفهرس Only 14 pages are availabe for public view
 |  | from | 198 |  |  |
| | | from | 198 | | |
Abstract
An investigation of the torsional behavior of reinforced concrete beams externally strengthened with fiber reinforced polymer (FRP) composite is conducted. Twenty four reinforced concrete beams subjected to torsional loads were tested. Two beams were considered for pilot study. The tested beams were classified into three groups according to the shape of the beam cross section (rectangular, L and T sections). Different parameters including type and shape of externally bounded composite were investigated. A nonlinear three dimensional finite element program (ANSYS 5.4) was employed to investigate and numerically predict the torsional behavior of the tested beams. The results were presented in the form of load-deflection, torque –angle of twist relationships as well as the stirrups strains in the beams. The test results indicated the feasibility of using externally bonded FRP sheets to increase the torsional capacity of reinforced concrete beams. The proposed numerical model using ANSYS program accurately predicts the load deflection, torque –angle of twist relationships.