Jacobs Journal of Civil Engineering

Seismic Evaluation of Framed Structures Reinforced by FRP bars

Published on: 2018-12-10

Abstract

The primary using FRP as replacement material instead of steel is curing corrosion in concrete structures, which caused damage in concrete. The use of FRP as concrete reinforcement is relatively new, despite of common using it as rehabilitation and retrofitting purpose. There are lacks of researches in, whether, experimentally or analytically data of performance and design of new FRP reinforced concrete structures, especially for seismically region. The main objectives of this research were evaluation the seismic performances of frames with FRP bars. Three models are considered to represent low-rise, medium-rise and high-rise frames. Also, this research is needed to gain a better understanding of the behavior of FRP materials and their interaction with traditional materials. A three parametric studied were investigated type of reinforcement, concrete strength and number of stories .In this study, analyzes of RC frames has been performed using SeismoStruct software. This is base shear - drift curve and the cracking behavior of performance criteria where obtained. By comparing the obtained results, it can be declared that FRP-RC frames are started to failure early than Steel-RC frames, thus the limit of inter-story drift at collapse prevention is different for FRP than Steel. Increasing number of stories affected on changing the stage of performance level of frames, however, the FRP-RC frame not much affect with this parameter. Increasing the concrete compressive strength enhanced the lateral load capacity for FRP-RC frames and with a little benefit for steel-RC frames. In general, the extent of damage experienced by the frames at the target displacement (performance point) was found to be between immediate occupancy and life safety when subjected to design lateral load.

Keywords

FRP; Reinforced concrete Frames; seismic evaluation; pushover analysis Inter-story drift; Performance level; SeismoStruct.