Clay block masonry and mortar joint interlocking

Ako se pri izvedbi konstrukcijskog ziđa upotrebljevaju opečni zidni elementi s vertikalnim šupljinama i mort opće namjene, tijekom ispunjavanja sljubnica nastupa prodiranje morta u šupljine zidnog elementa. Otpornost pri posmiku određuje se na jednak način za ziđe od punih ili šupljih opečnih zidnih elemenata te stoga utjecaj međusobnog spoja zidnih elemenata i sljubnica morta nije uzet u obzir. Pomoću prostornih nelinearnih proračunskih modela i usporedbom s odzivom fizikalnih modela provjeren je utjecaj međusobnog spoja šupljih zidnih elemenata i sljubnica morta na posmičnu nosivost.If clay blocks with vertical voids and general-purpose mortar are used in masonry construction, interlocking will occur during placement of units and mortar. Shear strength of the clay block and solid brick masonry is usually determined in the same way, without taking interlocking into consideration. With interlocking, the tensile strength of clay blocks is reached before mortar bed joint sliding occurs. In order to consider the effect of interlocking in nonlinear analyses, three-dimensional design models were built and verified using physical model response. The shear resistance function was adopted to enable proper description of masonry response