Factors determining the quality of masonry – differentiation of resistance and reliability

Joanna Zięba

j.zieba@prz.edu.pl
Department of Building Structures, Faculty of Civil and Environmental Engineering and Architecture; Rzeszow University of Technology; 2 Poznańska Street, Rzeszow 35-084; (Poland)
https://orcid.org/0000-0003-1800-5697

Lidia Buda-Ożóg


Department of Building Structures, Faculty of Civil and Environmental Engineering and Architecture; Rzeszow University of Technology, 2 Poznańska Street, Rzeszow 35-084; (Poland)
https://orcid.org/0000-0002-1205-1345

Izabela Skrzypczak


Department of Building Structures, Faculty of Civil Engineering Environmental Engineering and Architecture; Rzeszow University of Technology; 2 Poznańska Street; Rzeszow 35-084; (Poland)
https://orcid.org/0000-0003-0978-3040

Abstract

A house or any other building without walls is truly hard to imagine. The first thing usually associated with walls is, of course, masonry. Today, masonry walls perform a load-bearing function in buildings up to four above-ground floors, in the higher parts of the buildings they perform a protective and stiffening function. However, there is a widespread opinion that the designer does not have to check the bearing capacity of masonry structures because masonry are were stand, are standing and will stand. Not everyone, however, currently works the wall as it should. The problem is that a lot of emphasis is now placed on reducing construction times. Therefore, there are a number of factors affecting the quality of the masonry structure, which overall reduce their safety. The article presents the influence of the quality of masonry on the differentiation of bearing capacity and reliability of an example masonry structure. The analyses included various values γm of the partial factor, recommended in the national annex PN-EN 1996-1, depending on the category of masonry units, class execution of works and type of mortar. In addition, a decrease in load capacity and reliability caused by the increase of the initial eccentric resulting from the inaccuracy of the masonry wall was examined.


Keywords:

masonry structures, reliability of construction, compressive strength, quality assurance

EN 1996-1-1:2004 Eurocode 6: Design of masonry structures - Part 1-1: General rules for reinforced and unreinforced masonry structures. 2004 CEN.
  Google Scholar

Stewart M.G., Lawrence S.J., “Model Error, Structural Reliability and Partial Safety Factors for Structural Masonry in Compression”, Masonry International, vol. 20, no. 3, 2007, pp. 107-116.
  Google Scholar

Drobiec Ł., Jasiński R., Piekarczyk A., Masonry structures according to Eurocode 6 and related standards. PWN, vol. 2, Warsaw, 2013.
  Google Scholar

EN 1996-1-2:2005 Eurocode 6: Design of masonry structures - Part 1-2: General rules - Structural fire design. 2005 CEN
  Google Scholar

EN 1996-2:2006 Eurocode 6: Design of masonry structures - Part 2: Design considerations, selection of materials and execution of masonry. 2006 CEN.
  Google Scholar

EN 1996-3:2006 Eurocode 6: Part 3: Simplified calculation methods for unreinforced masonry structures. 2006 CEN.
  Google Scholar

EN 771-1:6, Specification for masonry units. 2005 CEN.
  Google Scholar

Buda Ożóg L., Skrzypczak I., Szylak K., Raczak A., Masonry constructions – examples of calculations according to Eurocode 6 and probabilistic methods. Rzeszow University of Technology Publishing House, Rzeszow, 2017.
  Google Scholar

Rybarczyk T., „Czynniki wpływające na wytrzymałość muru na ściskanie”, Materiały Budowlane, vol. 4, 2016, pp. 74-77. https://doi.org/ 10.15199/33.2016.04.20
DOI: https://doi.org/10.15199/33.2016.04.20   Google Scholar

EN 1990:2002 Eurocode – Basis of structural design. 2002 CEN.
  Google Scholar

PN-ISO 2394: General principles of reliability of building structures. 2010 CEN.
  Google Scholar

Woliński Sz., Fundamentals of Designing Structures in General Construction. PWN, vol. 3, Warszawa, 2011, pp. 112-146.
  Google Scholar

Woliński Sz., “Calibration of partial coefficients for existing structures”, Scientific Notebooks PRz, 2011.
  Google Scholar

Nowak A., Collins K., Reliability of Structures. CRC Press, 2012.
DOI: https://doi.org/10.1201/b12913   Google Scholar

Holicky M., Markova J., “Verification of load factors for concrete components by reliability and optimization analysis: Background documents for implementing Eurocodes”, Progress in Structural Engineering and Materials, vol. 2, no. 4, 2000, pp. 502-507.
DOI: https://doi.org/10.1002/pse.55   Google Scholar

Holicky M., Retief J. V., “Reliability assessment of alternative Eurocode and South African load combination schemes fot structural design”, Journal of and South African Institution of Civil Engineering, vol. 47, no. 1, (January 2005), pp. 15-20.
  Google Scholar

EN 772-1, Methods of test for masonry units -Part 1: Determination of compressive strength. 2005 CEN.
  Google Scholar

Ćwierz J., Cinal W., Kampczyk A., Measurement of deviations of the building facade walls from the vertical plane. https://doi.org/10.17512/znb.2016.1.04
DOI: https://doi.org/10.17512/znb.2016.1.04   Google Scholar


Published
2020-11-02

Cited by

Zięba , J., Buda-Ożóg, L. and Skrzypczak, I. (2020) “Factors determining the quality of masonry – differentiation of resistance and reliability”, Budownictwo i Architektura, 19(4), pp. 127–138. doi: 10.35784/bud-arch.2127.

Authors

Joanna Zięba  
j.zieba@prz.edu.pl
Department of Building Structures, Faculty of Civil and Environmental Engineering and Architecture; Rzeszow University of Technology; 2 Poznańska Street, Rzeszow 35-084; Poland
https://orcid.org/0000-0003-1800-5697

Authors

Lidia Buda-Ożóg 

Department of Building Structures, Faculty of Civil and Environmental Engineering and Architecture; Rzeszow University of Technology, 2 Poznańska Street, Rzeszow 35-084; Poland
https://orcid.org/0000-0002-1205-1345

Authors

Izabela Skrzypczak 

Department of Building Structures, Faculty of Civil Engineering Environmental Engineering and Architecture; Rzeszow University of Technology; 2 Poznańska Street; Rzeszow 35-084; Poland
https://orcid.org/0000-0003-0978-3040

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