Shear Strengthening of Craked RC Column Using UHPC Confinement Under Reversed Cyclic Loading

DOI

10.2991/978-94-6463-952-0_23How to use a DOI?

Keywords

Column Reinforcement; Shear Failure; Cyclic Load; UHPC; Diatomaceous earth

Abstract

This study aims to evaluate the effectiveness of strengthening methods on reinforced concrete (RC) columns that experience shear failure. The strengthening techniques include the injection of composite cement paste mixed with diatomaceous earth and the replacement and addition of concrete cover using Ultra-High-Performance Concrete (UHPC). The specimens consisted of RC columns with dimensions of 200 × 200 × 600 mm, equipped with 8D16 mm longitudinal reinforcement and Ø6-250 mm stirrups. A total of three columns were tested using different strengthening methods: an unstrengthened control column (S-1), a column without repair after initial cracking (S-2), and a column strengthened with UHPC (S-3). Cyclic loading tests were conducted based on FEMA 461, applying axial and lateral cyclic loads with two cycles at each displacement level to assess maximum load capacity, ductility, initial stiffness, and energy dissipation. The results show that the column strengthened with UHPC (S-3) demonstrated the best seismic performance, achieving a maximum displacement of 28.61 mm, a peak load of 144 kN, a ductility of 2.693, and higher energy dissipation capacity. In contrast, the unstrengthened column (S-1) failed at a displacement of 14.28 mm and a maximum load of 82 kN, with a ductility of 1.797. The column without repair (S-2) exhibited the lowest performance, failing at a displacement of 10.20 mm and a maximum load of 67 kN. These findings indicate that the use of UHPC is effective in enhancing the structural capacity against earthquakes, improving ductility, and increasing resistance to shear failure.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Dhea Rizky Amalia
AU  - Muttaqin Hasan
AU  - Taufiq Saidi
PY  - 2025
DA  - 2025/12/26
TI  - Shear Strengthening of Craked RC Column Using UHPC Confinement Under Reversed Cyclic Loading
BT  - Proceedings of the 6th Aceh International Symposium on Civil Engineering (AISCE 2025)
PB  - Atlantis Press
SP  - 280
EP  - 293
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-952-0_23
DO  - 10.2991/978-94-6463-952-0_23
ID  - Amalia2025
ER  -