REASONS FOR THE FORMATION OF CRACKS IN THE CELLULAR CONCRETE WALLS OF A BUILDING WITH A MONOLITHIC REINFORCED CONCRETE

Abstract

The article presents the results of an analysis of the reasons for the formation of cracks in external and internal walls and partitions made of cellular concrete blocks of a multi-storey residential building with a monolithic reinforced concrete frame. The reasons for the formation of cracks were established on the basis of monitoring their opening and testing by loading of the section of the floor on which the walls and partitions damaged by cracks rested. The nature of the change in the opening width of cracks in masonry depending on the deflection of the floor is shown. It has been experimentally proven that the main reason for the formation of cracks in walls is tangential and tensile stresses in masonry caused by deflections of the supporting floor. The crack resistance of walls and partitions is significantly influenced by the quality of construction-and-assembling operations.