GUNKLER, E.; DASHKHUU, O.
Hochschule Ostwestfalen-Lippe, Fachbereich Bauingenieurwesen
For components subjected to concentrated loads it is assumed, that two-dimensional stresses are resulting in pressures higher than the one-dimensional pressure-resistance. This effect is taken into account when using enhancement factors for masonry wall calculation. The comparison of German standard DIN 1053-100:2006 with Eurocode 6 (EC6) resulted in differing enhancement factors of the same boundary conditions, especially when having end-strip loads.
Preliminary tests were carried out. In addition to its vertical load bearing capacity, the deformations of the masonry were measured, in order to confirm the assumption about the distribution of vertical stresses under an angle of 60° related to the horizontal. The studies demonstrated, that increasing of the masonry compression strength in some cases is not justified when applying end-strip loads and that we should not assume constant vertical masonry stresses under a distribution angle of 60° in the ultimate limit state in general. Cracks in masonry, create a column-like section of wall, whose length differs only slightly from the length of the bearing area at the top of the wall.
walls subjected to concentrated loads; enhancement factors; endstrip load; load distribution angle