Design recommendations for hollow concrete masonry walls subject to concentrated loads, based on a test program

1997 ◽  
Vol 24 (3) ◽  
pp. 380-391 ◽  
Author(s):  
N G Shrive ◽  
E Y Sayed-Ahmed
Keyword(s):  
Masonry Walls ◽  
Concentrated Loads ◽  
Test Program ◽  
Design Recommendations ◽  
Concrete Masonry ◽  
Concrete Masonry Walls

scholarly journals Design rules for hollow concrete masonry walls subjected to concentrated loads

2003 ◽  
Vol 30 (1) ◽  
pp. 203-211 ◽  
Author(s):  
Junyi Yi ◽  
Nigel G Shrive
Keyword(s):  
Experimental Studies ◽  
Masonry Wall ◽  
Masonry Walls ◽  
Concentrated Loads ◽  
Wall Width ◽  
Concentrated Load ◽  
Design Rules ◽  
Plate Length ◽  
Concrete Masonry ◽  
Concrete Masonry Walls

Design rules are proposed for assessing the bearing strengths of hollow concrete masonry walls subjected to in-plane concentrated loads. These are derived from numerical and experimental studies of this problem. Two possible zones of failure are considered: the solid–grouted masonry directly beneath the concentrated loads, and the hollow masonry beneath the grouted portion. The important factors influencing the bearing strength are taken into account: loading eccentricity across the wall width, effective loading area, loading plate length, and loading location along the wall. An angle of 22° or slope (vertical to horizontal) of 2.5:1 is chosen for a safe estimate of the dispersion of concentrated load through the solid–grouted masonry. For partial grouting patterns, at least two courses downward should be grouted to a length compatible with the loading plate. When compared with the available numerical and experimental results, conservative estimates of ultimate strength are obtained in all cases.Key words: design rules, hollow concrete masonry wall, in-plane concentrated load, out-of-plane eccentricities, loading plate length, loading locations, dispersion angle.

In-plane flexural strength of unbonded post-tensioned concrete masonry walls

2017 ◽  
Vol 136 ◽  
pp. 245-260 ◽  
Author(s):  
Reza Hassanli ◽  
Mohamed A. ElGawady ◽  
Julie E. Mills
Keyword(s):  
Flexural Strength ◽  
Masonry Walls ◽  
Concrete Masonry ◽  
Concrete Masonry Walls ◽  
Post Tensioned

scholarly journals Behavior of Partially Grouted Concrete Masonry Walls under Quasi-Static Cyclic Lateral Loading

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2424
Author(s):  
Sebastián Calderón ◽  
Laura Vargas ◽  
Cristián Sandoval ◽  
Gerardo Araya-Letelier
Keyword(s):  
Shear Strength ◽  
Aspect Ratio ◽  
Load Capacity ◽  
Masonry Walls ◽  
Lateral Stiffness ◽  
Edge Elements ◽  
Vertical Reinforcement ◽  
Concrete Masonry ◽  
Resistance Degradation ◽  
Concrete Masonry Walls

Eight partially grouted (PG-RM) concrete masonry walls were tested to study the influence of the strength and width of blocks, the wall aspect ratio, the horizontal and vertical reinforcement ratio, and the presence of edge elements (flanges). The results were analyzed in terms of the failure mode, damage progression, shear strength, lateral stiffness degradation, equivalent viscous damping ratio, and displacement ductility. Additionally, the performances of some existing shear expressions were analyzed by comparing the measured and predicted lateral load capacity of the tested walls. Based on the results, a slight increment in the lateral stiffness was achieved when employing stronger blocks, while the shear strength remained constant. Besides, increasing the width of concrete blocks did not have a significant effect on the shear strength nor in the initial tangential stiffness, but it generated a softer post-peak strength degradation. Increasing the wall aspect ratio reduced the brittleness of the response and the shear strength. Reducing the amount of vertical reinforcement lowered the resulting shear strength, although it also slowed down the post-peak resistance degradation. Transversal edge elements provided integrity to the wall response, generated softer resistance degradation, and improved the symmetry of the response, but they did not raise the lateral resistance.

scholarly journals Experimental and numerical analysis on the structural fire behaviour of three-cell hollowed concrete masonry walls

2021 ◽  
Vol 228 ◽  
pp. 111439
Author(s):  
Rafael G. Oliveira ◽  
João Paulo C. Rodrigues ◽  
João Miguel Pereira ◽  
Paulo B. Lourenço ◽  
Rúben F.R. Lopes
Keyword(s):  
Numerical Analysis ◽  
Masonry Walls ◽  
Fire Behaviour ◽  
Structural Fire ◽  
Concrete Masonry ◽  
Concrete Masonry Walls
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