Shear Capacity of the Flange-Web Intersections of Brick Masonry Nonrectangular Sections
Publication: Journal of Structural Engineering
Volume 136, Issue 5
Abstract
The monolithic structural action of various types of walls of flanged cross section and walls with engaged stiffeners or returns (nonrectangular sections) is critically dependent on the shear capacity of the interface between the components making up the section. An assessment of the shear capacity of the interface may also be required as part of the elastic or inelastic analysis of structural elements. Observation of past earthquake events has confirmed that effectively connected flanges also directly influence the seismic performance of nonrectangular sections by providing a more robust and seismically resistant structural element. To analyze the significance of the parameters that influence the vertical shear resistance of interfaces of flanged sections of masonry obtained using different types of bonding and bonding patterns (header units, shear connectors, and wire ties), a series of specimens with “H-shaped” cross sections was tested. The vertical shear capacity of the interface at the flange-web intersection was assessed in each case and compared to predicted code capacities. Considerable strength reserves and shear ductility were observed in almost all cases. Following the experimental study, a numerical investigation was carried out using a simplified micromodeling finite element approach. It showed that both the size of the specimen as well as the boundary and applied loading conditions on the flanges can significantly influence the observed vertical shear resistance of the interfaces of specimens with the same bonding pattern. Using the results of the numerical investigation, the critical parameters for a test to determine the vertical shear capacity of brick masonry nonrectangular cross sections are assessed and the governing parameters for a suitable shear test suggested.
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Acknowledgments
The paper presents the results of research work at the University of Newcastle, Australia which is financed by the Masonry Research Group at the University of Newcastle and by Think Brick Australia (formally the Clay Brick and Paver Institute). Their support is gratefully acknowledged, as is the support of the activities of the first author from Professor P. B. Shing at University of Colorado at Boulder and through an Australia-Europe Grant funded by the Australian Government through the Department of Education, Training and Youth Affairs and promoted by Australian Education International.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 136 • Issue 5 • May 2010
Pages: 574 - 585
Copyright
© 2010 ASCE.
History
Received: Apr 15, 2008
Accepted: Nov 2, 2009
Published online: Nov 4, 2009
Published in print: May 2010
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