New reinforcement structures of reinforced concrete floor slabs and their technical and economic efficiency

Abstract

The article deals with the new reinforcement structures of reinforced hollow core slabs, their advantages and disadvantages. Thearticle analyses their technical and economic efficiency. Along with the new construction, the reconstruction and the total renovation of existing buildings are being actively carried out. The given works are produced both for defectselimination of building structures, and for buildings re-profiling, which causes loads increase on the floors. Therefore, issues related to the reinforcement of building structures are getting more and more urgent [1-4]. Here, it is worth paying special attention to the prefabricated reinforced concrete structures. Several types of reinforcement structures for these slabs have been developed and patented [5-15]. Based on these patents, four (4) basic types of reinforcement structures were developed. In the first type, the reinforcement bar is located below the hollowness of the slab. In the second type, the reinforcement bar is located in a slot punched between the bottom of the hollowness and the bed of the slab. In the third type, the reinforcement bar is located under the bed of the slab. In the fourth type, the reinforcement bar is located at a certain distance from the bed of the slab in a monolithic rib, connected with the hollowness of the slab. The technical characteristics of reinforcement were checked and confirmed experimentally on full-scale samples. For the experiment, five series of slabs PC-42.12-6T were manufactured on the basis of the working drawings of the series 1.141-1 at.60, one series for each type of reinforcement and one for testing without reinforcement.