Flexural Analysis Combined with Freeze-thaw Depth for Reinforced Concrete Beams and Columns

This study presents a kinematic model for flexural analysis of RC beams and columns subjected to freeze-thaw action based on upper bound theorem. The developed model enables analytical derivation of the contribution of damaged concrete when actual deterioration profile is idealized as an assemblage...

Full description

Saved in:
Bibliographic Details
Published in:Journal of Advanced Concrete Technology 2022/01/25, Vol.20(1), pp.18-29
Main Authors: Kanazawa, Takeru, Nakamura, Takuro, Sakaguchi, Junichi, Kawaguchi, Kazuhiro
Format: Article
Language:English
Subjects:
Civil engineers
Columns (structural)
Concrete
Concrete structures
Decision analysis
Decision making
Fatigue failure
Flexing
Freeze-thaw durability
Frost damage
Rehabilitation
Reinforced concrete
Upper bounds
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study presents a kinematic model for flexural analysis of RC beams and columns subjected to freeze-thaw action based on upper bound theorem. The developed model enables analytical derivation of the contribution of damaged concrete when actual deterioration profile is idealized as an assemblage of undamaged and damaged zones based on freeze-thaw depth obtained from concrete core specimens. The accuracy of the analysis is verified by comparing its predictions with available 21 RC columns and beams failing in flexure after freeze-thaw exposure. The predicted results show good agreement with the test results within error of 6% on average. Thereafter, the developed analysis predicts the ultimate moment capacity of a RC beam, which was taken from an existing bridge slab replaced because of the combined effect of frost damage and fatigue. Results demonstrate that the present analysis could support a rational decision-making regarding the need for repair or rehabilitation. This paper is the English translation from the authors’ previous work [Kanazawa, T., Nakamura, T., Sakaguchi, J. and Kawaguchi, K., (2021). “Flexural analysis combined with freeze–thaw depth for RC linear members.” Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures), 77(4), 177-186. (in Japanese)].
ISSN:1346-8014
1347-3913
DOI:10.3151/jact.20.18