A DUCTILIDADE NA SEGURANÇA E DURABILIDADE DE ESTRUTURAS DE BETÃO

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New finite element to model bond–slip with steel strain effect for the analysis of reinforced concrete structures

Publication . Santos, José; Henriques, António Abel

The influence of steel strain in bond–slip relationship has been the subject of recent literature, especially steel strain after yielding. This paper presents a new bond element for finite element packages which performs the bond–slip relationship, including steel strain effect. The developed element consists of an orthotropic four-node plane stress element whose constitutive material laws were changed. In order to verify the accuracy of this element several 2D numerical results were compared with experimental data. The results obtained with this element showed the need for its use to achieve good results and the rel evance of steel strain effect on bond–slip relationship, especially in tension elements.

2015Journal article

Open access

Strength and ductility of damaged tempcore rebars

Publication . Santos, José; Henriques, A. Abel

The Tempcore rebars behaviour results from the interaction of the three layers that compose them, with different initial stresses. Therefore, their mechanical properties study is important for the understanding of the rebar overall behaviour. In this paper it is presented and discussed the results of hardness, strength and ductility obtained in tensile and hardness tests of several samples from Tempcore rebars (with high ductility) with various damage levels. The assessment of strength and ductility in locally damaged rebars concluded that the ultimate strain decrease is the main anomaly, mainly due to the hardening of steel that allows overcoming the yield stress decrease until damages of 20%.

2015Journal article

Open access