Influence of loading rate on bond shear strength of autoclaved aerated concrete masonry

Devi, Ningombam Reena; Dhir, Prateek Kumar; Sarkar, Pradip

Abstract

This study aims to investigate the bond shear strength of autoclaved aerated concrete (AAC) masonry, focusing on the influence of pre-compression and load rates. Experimental results show that the bond shear strength of AAC masonry increases with increasing load rates as well as with increasing pre-compression stress. It is understood from the experimental studies that both loading rate and pre-compression stress significantly affect the failure mode and stress distribution of AAC masonry specimens under shear loading. To provide further insights, the paper aims to develop a nonlinear finite element modelling approach with Abaqus software employing detailed surface-based cohesive contact approaches, which can reliably capture the bond shear behaviour and failure modes of AAC masonry. Higher stress contours are seen at higher displacement rates due to the development of sudden dynamic and irregular loads compared to lower rates. The stress-strain characteristics and the deformed shape of the specimens obtained from the numerical analyses were found to be identical to those from the experimental studies. Instead of expensive and time-consuming experimental tests, the proposed numerical modelling approach can be an effective alternative to studying the bond shear behaviour of AAC masonry.

Citation

Devi, N. R., Dhir, P. K., & Sarkar, P. (2024). Influence of loading rate on bond shear strength of autoclaved aerated concrete masonry. Construction and Building Materials, 416, Article 135072. https://doi.org/10.1016/j.conbuildmat.2024.135072

• Journal Article Type: Article
• Acceptance Date: Jan 15, 2024
• Online Publication Date: Jan 31, 2024
• Publication Date: Feb 16, 2024
• Deposit Date: Mar 6, 2024
• Publicly Available Date: Mar 6, 2024
• Journal: Construction and Building Materials
• Print ISSN: 0950-0618
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 416
• Article Number: 135072
• DOI: https://doi.org/10.1016/j.conbuildmat.2024.135072
• Keywords: General Materials Science; Building and Construction; Civil and Structural Engineering
• Public URL: https://durham-repository.worktribe.com/output/2289970