Simulation of Behavior of Composite Grid Reinforced oncrete Beams Using Explicit Finite Element Methods

摘要

Research has been done in the past to investigate the potential of three-dimensional FRP grating cages to replace steel reinforcement in concrete structures. In recent years, CAE (Computer Aided Engineering) has become very popular for effective analysis of many structural systems. The present study focuses on the use of explicit finite element analysis tools to predict the behavior of composite-grid- reinforced concrete beams. Final results of this research would be useful to develop guidelines for design of composite-grid-reinforced concrete systems. Finite element simulations on composite-grid-reinforced concrete beams are performed for validation with experimental data on simply supported beams subjected to a four- point bending test. Simulations were made with the aim of predicting the correct nonlinear load-deflection behavior and failure mode of the structural system. Structural response predictions are performed using LS-DYNA, which is an explicit finite element program widely used for nonlinear analysis of inelastic structures. Simulation results were able to capture the overall load-deflection characteristics of the system, including ultimate load and deflection values, and failure modes from the experimental data. Computer simulations of these systems using explicit finite element methods can help to provide the designer additional information such as failure modes not captured using conventional beam design formulas, which can control the design of the structural system.