Shear Strength Prediction of Reinforced Concrete Walls with Opening and Boundary Elements
Publication: Journal of Structural Engineering
Volume 149, Issue 7
Abstract
Reinforced concrete (RC) walls containing openings are usually stiffened by boundary elements (or boundary flanges) in the form of columns on one or both sides. Both thickness and longitudinal reinforcement ratio of such boundary members generally exceed those of enclosed walls. Such boundary elements also contribute to an improvement in the strength of enclosed walls. As a result, the strength of RC walls with openings with boundary elements is higher than those without them. In this paper, an analytical approach based on the softened strut-and-tie model is proposed to evaluate the shear strength of RC walls with a central opening and enclosed by boundary elements. The combined behavior of the wall and boundary elements under a simultaneous bending moment and axial loading is considered in the sectional analysis to calculate neutral axis depth for evaluating strut capacity. Shear strength predictions through the proposed approach showed reasonable accuracy when verified against the test data from eleven RC walls with a single central opening. Comparisons are also made with strength estimations based on American and Japanese code provisions. Finally, a simplified equation for the evaluation of neutral axis depth is presented to enable design engineers to conduct preliminary design of RC walls with openings that are enclosed by boundary elements.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The study is supported by the National Center for Research on Earthquake Engineering (NCREE) of National Applied Research Laboratories (NARLabs) in Taiwan through Grant No. 06105C9029. Furthermore, support from the Ministry of Science and Technology, Taiwan, under Grant No. MOST 109-2221-E-002-007-MY3 is gratefully acknowledged.
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© 2023 American Society of Civil Engineers.
History
Received: Feb 16, 2022
Accepted: Feb 2, 2023
Published online: Apr 27, 2023
Published in print: Jul 1, 2023
Discussion open until: Sep 27, 2023
ASCE Technical Topics:
- Boundary element method
- Boundary shear
- Columns
- Concrete
- Concrete columns
- Engineering fundamentals
- Engineering materials (by type)
- Flow (fluid dynamics)
- Fluid dynamics
- Fluid mechanics
- Hydrologic engineering
- Material mechanics
- Material properties
- Materials engineering
- Methodology (by type)
- Numerical methods
- Reinforced concrete
- Shear strength
- Shear walls
- Strength of materials
- Structural engineering
- Structural members
- Structural systems
- Struts
- Walls
- Water and water resources
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