Seismic Rehabilitation of Strengthened Reinforced Concrete Interior Beam-Column Joints Using FRP Composites

Unsuitable performance of concrete joints are important factors of destruction of concrete structures due to earthquake; thus strengthening and improvement of concrete joints can be a good solution to overcome with these factors. In this research, reinforced concrete joints strengthened with FRP composites are investigated. Also, by ABAQUS software, the effect o fusing different kinds of polymer composites sheets (FRP) with different reinforcing models on bearing capacity and displacement of plastic hinge location at the same time. To do this, at first a concrete connection in ABAQUS software with a CFRP layer is reinforced according to lab specifications and after the comparison of the results of software with the already done lab specimen, validity and precision of the software performance was considered. Then, 58 specimens of reinforced concrete joints were modeled in two states of reinforced and non-reinforced by FRP sheets with different reinforcement models, in addition by considering the effects of length, along fibers, binding and the material of fiber (CFRP-GFRP) were considered and their final bearing capacity was determined. The results reveal that using FRP for shear strengthening and increasing bearing capacity can be a good choice to reinforce and treat the structures. Also, the results show the maximum bearing increasing of reinforced connection according to reinforcement model in all the connection as entirely. [Mohammad Zeynali Moghaddam. Seismic Rehabilitation of Strengthened Reinforced Concrete Interior Beam-Column Joints Using FRP Composites. Life Sci J 2012;9(4):5428-5435] (ISSN:1097-8135). http://www.lifesciencesite.com. 803