Flexural performance of RC beams reinforced with different types of grids

Authors

  • Aliaa Hanan, Majid Muttashar, Kasim Alomari

Abstract

In this study, concrete beams reinforced with layers of steel and FRP grid (mesh) in addition to the minimum steel reinforcement. In order to investigate the effect of using grids as additional reinforcement on the flexural performance of concrete beams, five beams were cast with dimensions (150 mm x 200 mm x 1200 mm) with compressive strength of 30 MPa after 28 days. The test beams are simply supported over a span of 1000 mm rested on stiff steel frame loaded with four-point loads. The test results indicated that the first crack load and ultimate load of beams that were reinforced with mesh are more than the control beam. It is evident that the load carrying capacity and the first crack load increase when the number of mesh layers increase. The percentage increase in ultimate loads of mesh beam compared to reference beam (RO) were 3.26%, and 14 %,11.95% and 25% for RS1, RS2, RGF1and RGF2, respectively. Beams incorporating mesh showed higher ductility compare to control beam. The percentages of increase were 7.36%, 13.67%, 21.44% and 42.1% for RS1, RS2, RGF1 and RGF2, respectively. Furthermore, the stiffness of the tested beams exhibited noticeable increase before yielding point at 2.7%, 4.6%, 15.8% and 2.4% for  RS1, RS2, RGF1and RGF2, respectively. However, after yielding point the stiffness percentages decreased for the tested beams at 5.88%, 46.74%, 8.22% and 56%  for  RS1, RS2, RGF1 and RGF2 respectively.

Published

2020-12-01

Issue

Section

Articles