Stress-Strain Characteristics of Clay Brick Masonry under Uniaxial Compression
Publication: Journal of Materials in Civil Engineering
Volume 19, Issue 9
Abstract
The uniaxial monotonic compressive stress-strain behavior and other characteristics of unreinforced masonry and its constituents, i.e., solid clay bricks and mortar, have been studied by several laboratory tests. Based on the results and observations of the comprehensive experimental study, nonlinear stress-strain curves have been obtained for bricks, mortar, and masonry and six “control points” have been identified on the stress-strain curves of masonry, which can also be used to define the performance limit states of the masonry material or member. Using linear regression analysis, a simple analytical model has been proposed for obtaining the stress-strain curves for masonry that can be used in the analysis and design procedures. The model requires only the compressive strengths of bricks and mortar as input data, which can be easily obtained experimentally and also are generally available in codes. Simple relationships have been identified for obtaining the modulus of elasticity of bricks, mortar, and masonry from their corresponding compressive strengths. It was observed that for the strong and stiff bricks and mortar of lesser but comparable strength and stiffness, the stress-strain curves of masonry do not necessarily fall in between those of bricks and mortar.
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Acknowledgments
The writers gratefully acknowledge the help extended by Dr. K. K. Bajpai, Mr. Uma Mahesh Reddy, and the staff at the Structural Engineering Laboratory at IIT Kanpur in conducting the experiments. The financial assistance provided by the Ministry of Human Resource Development (MHRD), Government of India, is gratefully acknowledged.
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© 2007 ASCE.
History
Received: Nov 20, 2005
Accepted: Jan 31, 2006
Published online: Sep 1, 2007
Published in print: Sep 2007
Notes
Note. Associate Editor: Chiara F. Ferraris
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