In-Plane Seismic Performance of Partially Grouted Reinforced Masonry Walls

Abstract

Building Code Requirements and Specification for Masonry Structures (TMS 402) used in USA proposes maximum flexural reinforcement ratio (ρmax) to ensure ductile behavior of reinforced masonry shear walls. However, in certain practical design cases when a wall is under high axial load, this ρmax tends to be lower than minimum or even zero, i.e., the wall cannot be constructed following the TMS 402 design provisions. This paper investigates the seismic behavior of three full scale partially grouted special reinforced masonry shear walls (PG-RMSWs) subjected to high axial loads (10, 15 and 20%) aiming to evaluate the ductile performance of PG-RMSWs. A test setup was developed to test the walls under quasi-static cyclic loading. The effects of the level of axial compressive stress were studied on the inelastic behavior, damage progression, load–displacement response, extent of yielding in reinforcements, and axial strain in the masonry of the three PG-RMSWs. These walls under high axial load showed flexure and flexure-shear behavior and at 20% strength degradation reached a drift of 1.30–2.43%. At ultimate capacity, the strains recorded on flexure reinforcements showed yielding at a factor of ≥ four times εy and strain in masonry was found to be 2–3 times the design value 0.0025 for all the walls. The paper evaluated these ductile performance parameters and aims to fill the gaps in the literature for partially grouted RMSWs.

Department(s)

Civil, Architectural and Environmental Engineering

Comments

Missouri University of Science and Technology, Grant None

Keywords and Phrases

Cyclic loads; Ductility; Partially grouted; Reinforced masonry; Seismic behavior; Seismic response; Shear walls

International Standard Book Number (ISBN)

978-303163279-2

International Standard Serial Number (ISSN)

2366-2565; 2366-2557

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Springer, All rights reserved.

Publication Date

01 Jan 2024

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