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Jacketing with steel angle sections and wide battens of RC column and its influence on blast performance

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Abstract

Occurrence of extreme loadings on the structure caused by man-made or accidental explosions is not uncommon. Such loadings jeopardize the safety/stability of structure if the key load-carrying member(s) are damaged. Strengthening of compression members of the buildings which is more vulnerable to blast loading may be required, and therefore, is of considerable interest to the structural designers. Confining of the concrete using seismic confining lateral reinforcement of reinforced concrete (RC) column is considered which is not found to control the damage and maximum displacement. The blast performance of RC column may also be improved by enlarging its size using additional concrete and steel, which may not be the choice of the owner of building, or may not be allowed as it might affect the functionality of the building. The objective of this study is to enhance the blast performance of the seismically designed axially loaded square RC column without increasing its cross section using a novel approach wherein four angle sections made of structural steel along the vertical edges throughout the length of the column are taken. The angle sections are connected on the four faces of the column over the regions of confining reinforcement as well as mid-height region using battens/plates. Analyses have been carried out employing ABAQUS software with explicit dynamic solver. The Concrete Damage Plasticity (CDP) model including the strain rate effect as per CEB-FIB MODEL CODE 2010 is used to model the concrete material behavior to blast loading. Proposed strengthening technique enhances the blast performance of the square RC column significantly. This work is useful to lessen the vulnerability of the compression member(s) failure of which tends to contribute to local hazard amounting to severe damage to the buildings and loss of lives.

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The authors received no financial support for the research, authorship, and/or publication of this article.

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Authors and Affiliations

  1. Department of Civil Engineering, Jamia Millia Islamia, Delhi, 110 025, India

    Mohd Shariq, Asif Husain & S. M. Anas

  2. Department of Civil Engineering, Netaji Subhas University of Technology, New Delhi, Delhi, 110 073, India

    Mehtab Alam

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  1. Mohd Shariq
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Correspondence to Mohd Shariq.

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Shariq, M., Alam, M., Husain, A. et al. Jacketing with steel angle sections and wide battens of RC column and its influence on blast performance. Asian J Civ Eng 23, 487–500 (2022). https://doi.org/10.1007/s42107-022-00437-9

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  • DOI: https://doi.org/10.1007/s42107-022-00437-9

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