Incorporation of cracks in finite element modelling of existing concrete structures
Paper in proceedings, 2019

Transport infrastructures are fundamental in society and interruption in their service leads to large economic losses. However, inspection and maintenance work of said infrastructures need to be performed to ensure their safety, which traditionally involves limitation or interruption of their use. This paper treats the finite element modelling part of a framework for non-intrusive assessment of existing structures. In practice, the load history of a structure is rarely known in detail. Here, existing cracks due to previous loading is included from the start of the finite element (FE) analysis to circumvent this issue. The focus is on comparing the choice of different shear retention factors for discrete cracks based on comparison to experimental test results. The results indicate that the shear retention factor used for the discrete cracks does not influence the capacity, which remains the same for all considered values. It appears the anchorage force development of the bond-slip reinforcement does not rely on shear transfer in the discrete crack in the adopted FE model. Moreover, the results showed that combining both discrete cracks and abond-slip relation implicitly including the loss of confinement due to corrosion-induced splitting cracks leads to excessively low capacity compared to experimentalresults. From the present study it can be concluded that the shear retention factor is of little importance for the considered FE model. However, it is emphasized that other modelling choices may entail other findings.

Author

Mattias Blomfors

Chalmers, Architecture and Civil Engineering, Structural Engineering

Kamyab Zandi

Chalmers, Architecture and Civil Engineering, Structural Engineering

Karin Lundgren

Chalmers, Architecture and Civil Engineering, Structural Engineering

Structural Health Monitoring 2019: Enabling Intelligent Life-Cycle Health Management for Industry Internet of Things (IIOT) - Proceedings of the 12th International Workshop on Structural Health Monitoring

Vol. 1 1611-1618

12th International Workshop on Structural Health Monitoring
Stanford, USA,

Subject Categories

Applied Mechanics

Other Materials Engineering

Building Technologies

More information

Latest update

11/13/2019