Title:
Analysis of Fiber-Reinforced Polymer Composite Grid Reinforced Concrete Beams
Author(s):
Federico A. Tavarez, Lawrence C. Bank, and Michael E. Plesha
Publication:
Structural Journal
Volume:
100
Issue:
2
Appears on pages(s):
250-258
Keywords:
beam; composite; concrete; fiber-reinforced polymer; reinforcement; shear; stress
DOI:
10.14359/12489
Date:
3/1/2003
Abstract:
This study focuses on the use of explicit finite element analysis tools to predict the behavior of fiber-reinforced polymer (FRP) composite grid reinforced concrete beams subjected to four-point bending. Predictions were obtained using LS-DYNA, an explicit finite element program widely used for the nonlinear transient analysis of structures. The composite grid was modeled in a discrete manner using beam and shell elements, connected to a concrete solid mesh. The load-deflection characteristics obtained from the simulations show good correlation with the experimental data. Also, a detailed finite element substructure model was developed to further analyze the stress state of the main longitudinal reinforcement at ultimate conditions. Based on this analysis, a procedure was proposed for the analysis of composite grid reinforced concrete beams that accounts for different failure modes. A comparison of the proposed approach with the experimental data indicated that the procedure provides a good lower bound for conservative predictions of load-carrying capacity.