Testing and the Possibility of Using the A-IIIв Periodic Profile Reinforcement for Bridge Running Structures

A significant number of bridges in Ukraine were designed using A-III reinforcement according to typical projects, mainly in the period of the 60s-90s of the last century. Today, these structures have been in operation for more than 50–60 years and are in need of repair due to significant physical wear and tear, improper operation, and destruction during hostilities. The one of the repair options is the replacement of individual destroyed prefab slabs of the run with similar ones, since there are no problems with resting the slab on the supports and the dimensions in height. In such slabs, manufactured according to typical projects, as prestressed reinforcement, reinforcement of class A-IIIв is used. It have manufactured at the factory producing slabs of girder structures from A-III reinforcement, according to GOST 5781 “Hot-rolled steel for reinforcement of reinforced concrete structures. Technical conditions”, by pulling (tensile strengthening). To perform such works, equipment, specialists, regulatory documentation and reinforcement of appropriate quality are necessary. As for regulatory documentation, until 1991 it have developed centrally, after 1991, regulatory documents have often not updated, one has to work with outdated regulatory documents. The absence of valid (active) normative documents can cause the production of low-quality structures.