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Projects / Programmes source: ARIS

The influence of robustness of masonry units and type of construction on seismic behaviour of masonry walls

Research activity

Code Science Field Subfield
2.01.00  Engineering sciences and technologies  Civil engineering   

Code Science Field
T220  Technological sciences  Civil engineering, hydraulic engineering, offshore technology, soil mechanics 
T230  Technological sciences  Building construction 
Keywords
masonry structures, masonry units, robustness, criteria, mathematical model, testing method, masonry bond, seismic behaviour, design, recommendations
Evaluation (rules)
source: COBISS
Researchers (8)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  20631  PhD Uroš Bohinc  Civil engineering  Technical associate  2004 - 2007  110 
2.  15189  PhD Vlatko Bosiljkov  Civil engineering  Researcher  2004 - 2006  429 
3.  04259  Branko Cerut  Civil engineering  Technical associate  2004 - 2007  56 
4.  14870  PhD Iztok Klemenc  Civil engineering  Researcher  2004 - 2007  224 
5.  05697  MSc Marjanca Lutman  Civil engineering  Technical associate  2004 - 2007  481 
6.  06018  Ljubo Petkovič  Civil engineering  Technical associate  2004 - 2007  64 
7.  00654  PhD Miha Tomaževič  Civil engineering  Head  2004 - 2007  743 
8.  20626  Sebastian Trajkovski  Civil engineering  Researcher  2004 - 2005  35 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  1502  Slovenian National Building and Civil Engineering Institute  Ljubljana  5866324000  10,361 
Abstract
As the recent experimental investigations indicated, the robustness of modern hollow masonry units represents the basic parameter, which defines the seismic behaviour of masonry walls and structures. In the case of the local brittle failure of masonry units, the failure mechanisms of the walls subjected to seismic loads change, so that, because of the changed basic relationships, the validity of most practically used calculation procedures for seismic resistance verification of unreinforced and especially reinforced masonry structures becomes questionnable. This is also recognized in the new draft of Eurocode 8, where the requirement that masonry units, used for the construction of masonry structures in seismic zones, should have sufficient robustness to avoid local brittle failure, is given. However, no quantitative criteria to fulfill this requirement are given in Eurocode. Within the framework of this reserach project, the criteria for the classification of hollow masonry units regarding the robustness will be determined and an experimental testing method for simple evaluation of robustness will be developed. The influence of mortar strength and the way of laying the units will also be investigated, and a numerical model to simulate the stress state in the units under seismic loading will be developed to optimise the shape of the units (distribution and thickness of shells and webs, the ratio of holes) and the way of laying (type and thickness of mortar bed-joints). The influence of different types (classes) of perpend joints (fully and partly grouted, ungrouted, mechanical interlocking) on the homogeneity of structural walls, built with masonry units which comply with the criteria for sufficient robustness, will also be investigated. On the basis of the comparison of the behaviour of the walls subjected to cyclic lateral loads the relevant recommendations and/or limitations for the use of different types of masonry bond in seismic regions will be proposed.
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