Article: Performance prediction of braced unreinforced and strengthened clay brick masonry walls under close-range explosion through numerical modelling Journal: International Journal of Computational Materials Science and Surface Engineering (IJCMSSE) 2022 Vol.11 No.2 pp.120 - 146 Abstract: Experimentally tested an unreinforced braced clay brick masonry wall by Badshah et al. (2021) under 4.34 kg and 7.49 kg-TNT explosion loads at scaled distances respectively 2.19 m/kg1/3 and 1.83 m/kg1/3 is micro modelled in ABAQUS/Explicit code and analysed considering concrete damage plasticity (CDP) model with loading rate effects. Wall performance obtained from the analysis is found closely matching with the experimental results. Efforts are made to strengthen the wall following: 1) C-FRP wrapping; and 2) mesh of steel strip with angle sections at the edges of the wall. The load carried and its mechanism by unreinforced and strengthened walls are highlighted. Damage to the wall strengthened with 2 mm thick CFRP wrapping on both the faces is found comparable with the wall strengthened with strips and angles of thickness 5 mm under blast loading. From the ease of application point of view, strengthening the wall with wrapping is better than with the steel strip-angle technique. Inderscience Publishers - linking academia, business and industry through research

Title: Performance prediction of braced unreinforced and strengthened clay brick masonry walls under close-range explosion through numerical modelling

Authors: S.M. Anas; Mehtab Alam; Mohammad Umair

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 ' Department of Civil Engineering, Faculty of Engineering and Technology, Jamia Millia Islamia (A Central University), New Delhi, 110 025, India

Abstract: Experimentally tested an unreinforced braced clay brick masonry wall by Badshah et al. (2021) under 4.34 kg and 7.49 kg-TNT explosion loads at scaled distances respectively 2.19 m/kg^1/3 and 1.83 m/kg^1/3 is micro modelled in ABAQUS/Explicit code and analysed considering concrete damage plasticity (CDP) model with loading rate effects. Wall performance obtained from the analysis is found closely matching with the experimental results. Efforts are made to strengthen the wall following: 1) C-FRP wrapping; and 2) mesh of steel strip with angle sections at the edges of the wall. The load carried and its mechanism by unreinforced and strengthened walls are highlighted. Damage to the wall strengthened with 2 mm thick CFRP wrapping on both the faces is found comparable with the wall strengthened with strips and angles of thickness 5 mm under blast loading. From the ease of application point of view, strengthening the wall with wrapping is better than with the steel strip-angle technique.

Keywords: blast loading; bricks; computational analysis; C-FRP; CDP model; damage; masonry walls; micro-modelling; steel jacketing.

DOI: 10.1504/IJCMSSE.2022.127973

International Journal of Computational Materials Science and Surface Engineering, 2022 Vol.11 No.2, pp.120 - 146

Received: 08 Aug 2022
Accepted: 05 Sep 2022
Published online: 22 Dec 2022 *

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Title: Performance prediction of braced unreinforced and strengthened clay brick masonry walls under close-range explosion through numerical modelling

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