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Analytical model for the bond-slip behaviour of corroded ribbed reinforcement

Karin Lundgren (Institutionen för bygg- och miljöteknik, Konstruktionsteknik) ; Per Kettil (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Kamyab Zandi Hanjari (Institutionen för bygg- och miljöteknik, Konstruktionsteknik) ; Hendrik Schlune (Institutionen för bygg- och miljöteknik, Konstruktionsteknik) ; Armando Soto San Roman
Structure & Infrastructure Engineering (1573-2479). Vol. 8 (2012), 2, p. 157-169.
[Artikel, refereegranskad vetenskaplig]

Corrosion of reinforcement affects the bond mechanism between reinforcement and concrete, and thus the anchorage. Reliable models describing this are needed especially for assessment of the load-carrying capacity of existing structures. This paper presents an analytical one-dimensional model for bond-slip response of corroded reinforcement. The proposed model is an extension of the bond-slip model given in the CEB-FIP Model Code 1990, and is practically applicable for structural analyses to determine the load-carrying capacity of corroded structures. Furthermore, the anchorage length needed to anchor the yield force is calculated from the bond slip, using the one-dimensional bond-slip differential equation. Results of the proposed model are compared to experimental results as well as results from an advanced three-dimensional finite element model. The suggested model is shown to give results that are consistent with the physical behavior.

Nyckelord: corrosion, bond slip, concrete, reinforcement, analytical model



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Denna post skapades 2011-12-22. Senast ändrad 2014-10-27.
CPL Pubid: 150902

 

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