Tension Stiffening Bond Modelling of Cracked Flexural Reinforced Concrete Beams/Supleišėjusių Gelžbetoninių Sijų Armatūros Ir Betono Sankibos Modeliavimas

Abstract

Abstract. This paper deals with the analysis of cracked flexural reinforced concrete structures with special highlighting of modelling the interaction between concrete and reinforcement. A new approach based on the bond stress distribution through the transfer length between the zero-slip and the cracked sections is proposed. Since the cracking phenomenon of concrete occurs, the fracture energy changes in order to appeal to the interaction between concrete and steel. The increment of stresses is evaluated by the bond-slip distribution by means of one-dimensional problem. Besides, the 2D nonlinear description of components behaviour, concrete and steel are considered. On numerical modelling level, the interaction property is obtained from a variety of fundamental pull out and push out tests, for the most part this phenomenon does not very well represent the bending members. For this object, this study presents a numerical approach, which can compute the distribution stresses at the steel-concrete interface near flexural crack in reinforced concrete beams. Finally, predictions made by the non-linear finite element analysis program and the non-linear material models for concrete, reinforcing bars and bond slip are in good agreement with the experimental results.

Tension stiffening approach in concrete of tensioned members

“…In this scope, we can illustrate various works published in literature: Gilbert and Warner model (1978), Choi and Cheung (1996) and the CEB manual design model (Cracking et al 1985), and among those that modify the sectional area, such as: ACI-440 (2003) and Behfarnia (2009). Recently, many complex models based on the bond-slip mechanisms between concrete and reinforcing bars have been published: Khalfallah (2008), Gupta and Maestrini (1990), Kwak and Song (2002), Ng et al (2011). In these models, there are some limitations in applications because these approaches depend on the nature of the distribution functions of bond along the reinforcement axis and it follows in general a series of complex integrations of the second differential equation of bond.…”

Tension stiffening approach in concrete of tensioned members

“…In this scope, we can illustrate various works published in the literature: Gilbert and Warner model (1978), Choi and Cheung (1996) and the CEB manual design model (CEB 1985), and among those that modify the sectional area, such as ACI-440 (ACI Committee 2003) and Behfarnia (2009). Recently, many complex models based on the bond-slip mechanisms between concrete and reinforcing bars have been published: Khalfallah (2008), Gupta and Maestrini (1990), Kwak and Song (2002) and Ng et al (2011). In these models, there are some limitations in applications because these approaches depend on the nature of the distribution functions of bond along the reinforcement axis, and it follows in general a series of complex integrations of the second differential equation of bond.…”

On Shear Reinforcement Design of Structural Concrete Beams on the Basis of Theory of Plasticity

“…Recent studies (Khalfallah 2008) show that for the cracks width in RC members an important role plays the interaction between shear reinforcement and concrete, appearing from bond stress distribution.…”