MODELLING NON-LINEAR BEHAVIOUR OF STEEL FIBRE REINFORCED CONCRETE

摘要

Steel Fibre Reinforced Concrete (SFRC) is increasingly used in ground slab applications. The tensile stress-strain (σ-ε) relationship is needed for non-linear analysis of these slabs. In this paper, an analytical method to determine the tensile σ-ε relationship, is proposed. Using this method, the moment-curvature (M-φ) and load-deflection (P-δ) responses are derived by assuming a σ-ε relationship. A trial and error technique is followed, adjusting the σ-ε relationship until the analytical results fit the experimental results for either M-φ or P-δ. A parameter study is also conducted to study the influence of each of these parameters on the M-φ and the P-δ responses and to serve as aid to the user in adjusting the σ-ε parameters. The proposed analytical method is evaluated by comparing predicted M-φ and P-δ responses to published experimental results.