Title: Performance enhancement of square reinforced concrete column carrying axial compression by (1) C-FRP wrapping, and (2) steel angle system under air-blast loading

Authors: Mohd Shariq; Mehtab Alam; S.M. Anas; Nazrul Islam; Asif Hussain

Addresses: Faculty of Engineering and Technology, Department of Civil Engineering, Jamia Millia Islamia (A Central University), New Delhi, 110 025, India ' Department of Civil Engineering, Netaji Subhas University of Technology (West Campus), New Delhi, 110 073, India ' Faculty of Engineering and Technology, Department of Civil Engineering, Jamia Millia Islamia (A Central University), New Delhi, 110 025, India ' Faculty of Engineering and Technology, Department of Civil Engineering, Jamia Millia Islamia (A Central University), New Delhi, 110 025, India ' Faculty of Engineering and Technology, Department of Civil Engineering, Jamia Millia Islamia (A Central University), New Delhi, 110 025, India

Abstract: The present study focuses on how best can we enhance the blast resistance of reinforced concrete (RC) columns of an existing building. For this purpose, an RC column, 300 mm × 300 mm × 3000 mm, carrying an axial compression of 950 kN subjected to the 82 kg-TNT explosive loading is first analysed using the ABAQUS software. Strain rate effect on the concrete strength is considering using concrete damage plasticity (CDP) model. With the objective to improve the column response, (1) CFRP wrappings over the (i) seismic confining regions, (ii) seismic and mid-height regions, and (iii) entire length, and (2) jacketing with steel angles at the corners throughout the column length and connected with battens on the wrappings are considered. Results in terms of displacement, damage, and stresses are compared and discussed.

Keywords: blast loading; computational simulations; CFRP; damage; damage dissipation energy; RC columns; steel jacketing; seismic reinforcement.

DOI: 10.1504/IJCMSSE.2022.127974

International Journal of Computational Materials Science and Surface Engineering, 2022 Vol.11 No.2, pp.99 - 119

Received: 24 Aug 2022
Accepted: 28 Sep 2022
Published online: 22 Dec 2022 *

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