Abstract
The goal of the article is to elaboration analytical models describing a new system of reinforcing three-layer walls of large-panel buildings with bonded anchors. The use of this type of fasteners that bond the façade texture layer to the structural slab is necessary due to the low durability of previously used suspension elements. Various bonded anchorage systems were considered. The new anchorage systems were designed as two-anchors systems (horizontal anchor and diagonal anchors) and three-anchors systems (horizontal anchor and two diagonal anchors). The inclinations of these anchors are in the range of 30°-60° in relation to the surface of the element. For the above types of reinforcements, analytical models have been developed that take into account the change of strength parameters of the resin and steel from which the anchors were made, the interaction of materials resin-steel and resin-concrete and the effect of the simultaneous action of pull-out and shearing forces. Moreover, was assumed the simultaneous destruction of fasteners two- and three-anchors. The elaborated analytical models will be used to determine the load-bearing capacity of the new connector system, which will allow the elaboration of guidelines for strengthening three-layer walls of largepanel slab buildings.
Highlights
The emphasis is on the strengthening of panel buildings in Poland
This was due to the fact that the textured was a lighter layer of the structural layer through which pressure was lower layer of insulation, which originally accounted for polystyrene and mineral wool later years
There is no doubt that three-layer walls in large-panel buildings should be repaired or strengthened due to the dubious durability of the façade of the textured layer
Summary
The emphasis is on the strengthening of panel buildings in Poland. Because of ends of their durability, which exceeds 40 years. According to the author’s main problem is not the security of the whole structure of concrete slabs but individual components It comes to the so-called „anchors” that is, the connecting rods with one another triple wall parts namely textured layer, a layer of insulation in the form of expanded polystyrene or mineral wool and a structural layer. Pins were placed around the perimeter of panels and around openings in number from a dozen to several dozen pieces Their task was to stabilize the outer layer of the textured and counteracting the effects of the load from wind suction forces
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