Abstract
Reinforced concrete structures positioned in coastal areas undergo durability related concerns due to early deterioration of reinforcing bars due to corrosion. This result in a reduction of load-carrying capacity and service life of the structure. This study aims to analyse the effect of varying corrosion percentages on the load-bearing ability of the structure. The idea pertinent to this study is to
simulate various three-dimensional finite element beams in ABAQUS 6.14.1 and compare their results with the experimental data taken from the literature. The modelled beams are analysed with a four-point simply supported bending flexural test for validation. For concretesteel interaction simulation, the cohesive surface interaction method proved to be most suitable as the results align with analytical results. Loss of bond in concrete-rebar interface due to decrease in mechanical interlock is calculated. Concrete Damage Plasticity model is
adopted for calculating confined and unconfined strength of concrete in tension and compression. A parametric study is also performed to investigate varying corrosion percentages on residual capacity and behaviour of corroded beams. Flexural strength response due to spacing of transverse reinforcements as per different Indian standard codes is analysed. Spalling stress is calculated analytically and put into simulation data for more precise results. The results indicate a notable reduction in load-deflection behaviour due to concrete spalling, deterioration of rebars ribs, loss in mechanical interlock mechanism and yield strength. At very high corrosion, the structure undergoes an absolute brittle failure due to a complete steel-concrete bond loss. A good matching between finite element and experimental loaddeflection curves is observed with variability in ultimate load-bearing capacities of less than 5% for all cases.
simulate various three-dimensional finite element beams in ABAQUS 6.14.1 and compare their results with the experimental data taken from the literature. The modelled beams are analysed with a four-point simply supported bending flexural test for validation. For concretesteel interaction simulation, the cohesive surface interaction method proved to be most suitable as the results align with analytical results. Loss of bond in concrete-rebar interface due to decrease in mechanical interlock is calculated. Concrete Damage Plasticity model is
adopted for calculating confined and unconfined strength of concrete in tension and compression. A parametric study is also performed to investigate varying corrosion percentages on residual capacity and behaviour of corroded beams. Flexural strength response due to spacing of transverse reinforcements as per different Indian standard codes is analysed. Spalling stress is calculated analytically and put into simulation data for more precise results. The results indicate a notable reduction in load-deflection behaviour due to concrete spalling, deterioration of rebars ribs, loss in mechanical interlock mechanism and yield strength. At very high corrosion, the structure undergoes an absolute brittle failure due to a complete steel-concrete bond loss. A good matching between finite element and experimental loaddeflection curves is observed with variability in ultimate load-bearing capacities of less than 5% for all cases.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 7th International Conference on Civil, Structural and Transportation Engineering (ICCSTE'22) |
| Number of pages | 8 |
| Volume | 7 |
| ISBN (Electronic) | 978-1-990800-04-7 |
| Publication status | Published - Jun 2022 |
| Externally published | Yes |
Publication series
| Name | Proceedings of the International Conference on Civil, Structural and Transportation Engineering |
|---|---|
| ISSN (Electronic) | 2369-3002 |