PSI - Issue 70

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ScienceDirect

Procedia Structural Integrity 70 (2025) 67–73

Structural Integrity and Interactions of Materials in Civil Engineering Structures (SIIMCES-2025) Behaviour of Masonry Walls Under Combined Compression and Shear Loading: 3D Failure Analysis Chaitra Shree V. a , Sahana T. S. a , Raveesh R. M. a, *,Sowjanya G. V. b a Department of Civil Engineering, Sri Siddharth Institute of Technology, SSAHE, Tumakuru-572105, India. b Department of Water Resources and Ocean Engineering, National Institute of Technology Karnataka, Surathkal-575014, India. Abstract This study investigates the nonlinear behaviour and failure mechanisms of masonry infill walls subjected to combined axial compression and lateral shear loading. Using the Drucker-Prager plasticity model within ANSYS Workbench, a 3D finite element model of a reinforced concrete (RC) frame with masonry infill was developed. The simulation focused on crack initiation, propagation, and ultimate load-bearing capacity. Results revealed initial stiffness due to confinement, followed by diagonal shear cracking as the dominant failure mode. The finite element analysis showed good agreement with analytical estimations, with a deviation of only ±6% in peak shear capacity. Contour plots of equivalent plastic strain and stress trajectories highlighted the development of tension-induced cracks and residual strength, emphasizing the role of RC confinement. The study validates the Drucker-Prager model for simulating pressure-sensitive masonry behaviour and offers insights into stress redistribution and damage evolution under complex loading. These findings contribute to performance-based design, retrofitting strategies, and structural assessments of masonry-infilled frames under seismic or lateral forces. Future work may incorporate cyclic or probabilistic modelling for enhanced accuracy in real-world applications.

© 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of International Conference on Structural Integrity Organizers

Keywords: Masonry infill wall; Drucker-Prager model; shear-compression interaction; finite element analysis; diagonal cracking;

1. Introduction Masonry structures have been widely used in both historical and modern buildings due to their durability, availability of materials, and cost-effectiveness. Despite these advantages, their mechanical behaviour under complex

* Corresponding author. Tel.: +91-9964482129; E-mail address: raveesh.49@gmail.com

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of International Conference on Structural Integrity Organizers 10.1016/j.prostr.2025.07.027