abdallah, abdelrahman abdallah abdelrahman ORCID: https://orcid.org/0000-0001-8109-080X
(2024)
lateral cyclic performance and analysis of flexural-dominated reinforced masonry shear walls.
PhD thesis, Concordia University.
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Abstract
Reinforced masonry shear walls (RMSWs) provide lateral stability to reinforced masonry (RM) structures, especially in seismic-prone regions. They are categorized into fully grouted (FG) and partially grouted (PG) types. While FG-RMSWs offer high strength and stiffness suitable for high-seismic zones, PG-RMSWs are more cost-effective, reducing grouted cells while balancing performance and economy. Despite their economic benefits, PG-RMSWs are mainly used in low-rise buildings due to limited research on their seismic behavior in mid- and high-rise structures. This study investigates the in-plane quasi-static and dynamic responses of flexure-dominated RMSWs, focusing on grouting (PG vs. FG), cross-sectional configurations (rectangular and with boundary elements (BEs)), and shear reinforcement setups (bond beam reinforcement (BBR) vs. bed joint reinforcement (BJR)). The goal is to optimize CSA S304 seismic design provisions and expand the application of RMSWs in mid- and high-rise buildings.
The research consists of two phases. Phase I, “Shear and Flexural Behavior Enhancement of RMSWs,” includes experimental tests on flexural-dominated PG-RMSWs under quasi-static cyclic loading, as well as masonry wallets under diagonal tension. Two PG-RMSWs with identical aspect ratios, axial stresses, and flexural capacities but different cross-sectional configurations (rectangular and with BEs) were tested. Additionally, 34 masonry assemblages and 40 prisms with varying mortar and grout strengths and reinforcement configurations were evaluated to understand their shear and compressive behaviors. Results indicated that PG-RMSWs with BJR showed ductile behavior, significant energy dissipation, and enhanced shear strength, supporting their use in mid-rise buildings and informing updates to CSA S304.
Phase II involves numerical studies to analyze the lateral cyclic response of RMSWs under quasi-static and dynamic loading using the Applied Element Method (AEM) with Extreme Loading for Structures (ELS) software. Comparisons between PG-RMSWs with BBR or BJR and FG-RMSWs with different configurations revealed that PG-RMSWs had comparable ductility and drift capacities to FG-RMSWs, achieving up to 41% material savings.
Overall, the experimental and numerical findings emphasize the need to revisit seismic design provisions and shear strength equations in CSA S304 for PG and FG masonry. This research advances the economical use of PG-RMSWs in mid- and high-rise buildings, promoting their broader application in performance-based seismic design.
Divisions: | Concordia University > Gina Cody School of Engineering and Computer Science > Building, Civil and Environmental Engineering |
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Item Type: | Thesis (PhD) |
Authors: | abdallah, abdelrahman abdallah abdelrahman |
Institution: | Concordia University |
Degree Name: | Ph. D. |
Program: | Civil Engineering |
Date: | 17 December 2024 |
Thesis Supervisor(s): | Galal, Khaled |
Keywords: | Partially grouted; Reinforced masonry; Boundary elements; Rectangular shear walls; Quasistatic cyclic testing; Bed-joint reinforcement; Concrete block masonry; Ductility; Compressive strength; Shear strength; Ungrouted masonry; Grouted masonry; Mortar strength; Grout strength; Seismic performance; Nonlinear analysis; Incremental dynamic analysis; Applied element method; Seismic response modification factors; Fragility curves. |
ID Code: | 995074 |
Deposited By: | Abdelrahman Abdallah |
Deposited On: | 17 Jun 2025 13:56 |
Last Modified: | 17 Jun 2025 13:56 |
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