CS239617B1 - Contact for reinforced concrete structures of buildings and civil engineering structures - Google Patents

Abstract

The purpose of the solution is to design a joint connection for reinforced concrete structures of building and civil engineering structures with a high load-bearing capacity, which is achieved by means of an inclined joint between the central supported element and the plate placed on its edge. The inclined joint is created by an insert in the shape of a segment of a cylindrical or conical surface with welded or otherwise connected reinforcement of the central element and the plate, allowing for a possible change in the stiffness of the joint. The connecting insert acts as a tightening belt of the central element. In this way, it is possible to eliminate inaccuracies in the placement of structures on consoles, when due to large support pressures, creep and shrinkage of the concrete of the structure, the action of forces in the joint may change. Choosing a suitable joint slope together with the insert to which the reinforcement is attached will allow the internal forces acting in the joint to be directed. At the same time, the necessary stiffness of the joint is ensured. The new joint arrangement will reduce the effect of creep and shrinkage of the concrete structure, increase its safety and load-bearing capacity while saving direct costs, labor, energy, concrete, formwork, reinforcing steel and labor.

Description

The invention solves the joint arrangement for reinforced concrete monolithic, prefabricated and combined concrete structures with a high load-bearing capacity and with the aim of increasing the load-bearing capacity compared to hitherto commonly performed joints by means of a toothed bracket.

Currently, toothed brackets are used for reinforced concrete joints, prefabricated joints or prefahlaves. A drawback of the present arrangement of such joints is that the tooth-shaped bracket is very difficult to dimension and reinforce.

This drawback is eliminated by the contact according to the invention, which is based on the fact that in the joint of the joint there is a separating insert through which the subsurface reinforcement of the reinforced concrete structure passes.

In the new connection arrangement for concrete structures with a high load-bearing capacity, the advantage is the possibility of rectifying the tensile, main tensile and shear stresses by means of a slanted joint and a liner placed in the joint with possible stiffness change. brackets, where, due to the high support pressures, each swing in the bearing has a considerable influence on the stress and hence the bearing capacity.

Particularly advantageous is the use of a new joint for prefabricated concrete structures with high load-bearing capacity for non-coated ceilings of the combined prefamonolite system, where the precise contact of both sides of the joints, both prefabricated reinforced concrete (eg slabs or heads) increased bearing capacity. For the prefabricated element, concrete with randomly dispersed or rectified reinforcement of steel, mineral, plastic or vegetable fibers, which increase the load-bearing capacity and resistance of the concrete in tension, principal tensile, shear and compression, can be advantageously used.

Fig. 1 shows a longitudinal section of the joint, Fig. 2 shows a plan view of the prefabricated head of the prefamonolite system and Fig. 3 shows a detail of contact with reinforcing steel on both surfaces of the slab, connected by inclined insert.

a slanted joint 11 between the central support element 2 and the peripheral plate 3 (FIG. 1, FIG. 2) and at least one separating insert ₂₅ therebetween, supported by a reinforcement 6 (FIG. 3) below the reinforced concrete surface. The insert has the shape of a conical or cylindrical segment fixedly connected to the reinforcement extending into the prefabricated concrete structure of the central element 2 and the connected monolithic plate structure 3 allowing subsequent reinforcement 6 of the monolithic plate 3 in one or both of it surfaces.

Under load, the effect of the insert 5 on the central element 2 acting as a contracting belt is utilized. The reinforcement of the central element is connected to the joint insert 5 of the weld joint 7 or in another suitable manner. The insert 5 also serves as a formwork in the production of the central element.

Claims (1)

SUBJECT OF THE INVENTION Contact for reinforced concrete structures of building and civil engineering constructions formed by a slanted joint between the supported central element and its edge placed on its edge, characterized in that at least one separating insert (5) is placed in the joint (1) through which reinforcement ( 6), connected to the supporting reinforcement of the supported central element (2) and the plate (3).