Four levels to assess anchorage capacity of corroded reinforcement in concrete
Journal article, 2017

Corrosion of reinforcement affects anchorage capacity. In this study, four levels of analyses were, for the first time, compared with each other and to tests of naturally corroded beams. In the most advanced approach, three-dimensional non-linear finite element (3D NLFE) analyses employing previously developed bond and corrosion models were carried out. These analyses agreed well with the experiments in terms of crack pattern and maximum load capacity. The next approach consisted of 3D NLFE analyses with a pre-defined bond-slip relation between concrete and reinforcement, resulting in reasonable agreement; however, the anchorage capacity was overestimated and the crack pattern deviated from the experiments. At the next level, the bond-slip relation was used together with a measured available anchorage length, and the anchorage capacity was obtained by numerically solving the one-dimensional differential equation; the results were reasonably close to the experiments. In the most simplified approach, a constant bond stress was assumed together with the available anchorage length measured, which underestimated the capacities. In conclusion, the more advanced analyses provide reliable information regarding the structural behaviour, while the two simplified methods are well suited for use in practice.

Bond

Assessment

Anchorage

Natural corrosion

Reinforced concrete

Modelling

FE analysis

Author

Mohammad Tahershamsi

Chalmers, Civil and Environmental Engineering, Structural Engineering

Ignasi Fernandez

Chalmers, Civil and Environmental Engineering, Structural Engineering

Kamyab Zandi

Swedish Cement and Concrete Research Institute

Karin Lundgren

Chalmers, Civil and Environmental Engineering, Structural Engineering

Engineering Structures

0141-0296 (ISSN)

Vol. 147 434-447

Relating visual inspection to structural effects of natural corrosion in reinforced concrete structures

Swedish Transport Administration, 2014-05-15 -- 2017-05-15.

Driving Forces

Sustainable development

Areas of Advance

Transport

Building Futures

Subject Categories

Infrastructure Engineering

Other Civil Engineering

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1016/j.engstruct.2017.06.024

More information

Latest update

8/24/2018