Shear resistance of masonry walls and Eurocode 6: shear versus tensile strength of masonry |
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Authors: | Miha Toma?evi? |
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Affiliation: | (1) Slovenian National Building and Civil Engineering Institute, Dimičeva 12, 1000 Ljubljana, Slovenia |
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Abstract: | In the case of masonry structures subjected to seismic loads, shear failure mechanism of walls, characterised by the formation
of diagonal cracks, by far predominates the sliding shear failure mechanism. However, as assumed by Eurocode 6, the latter
represents the critical mechanism for the assessment of the shear resistance of structural walls. The results of a series
of laboratory tests are analysed to show that in the case of the diagonal tension shear failure the results of the Eurocode
6 based calculations are not in agreement with the actual resistance of masonry walls. The results of calculations, where
the diagonal tension shear mechanism and tensile strength of masonry are considered as the critical parameters, are more realistic.
Since the results of seismic resistance verification, based on the Eurocode 6 assumed sliding shear mechanism, are not in
favour of structural safety, it is proposed that in addition to sliding shear, the diagonal tension shear mechanism be also
considered. Besides, in order to avoid misleading distribution of seismic actions on the resisting shear walls, the deformability
characteristics of masonry at shear should be determined on the basis of experiments and not by taking into account the Eurocode
6 recommended G/E ratio. |
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Keywords: | Masonry structures Seismic resistance Shear Sliding shear mechanism Diagonal tension shear mechanism Shear strength Tensile strength Shear resistance Eurocodes |
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