Strengthening of reinforced concrete products of large-panel buildings damaged by cracks

Number of journal: 3-2019
Autors:

Filatov E.F.
Ivankov A.V.

DOI: https://doi.org/10.31659/0044-4472-2019-3-47-52
УДК: 69.056.52

 

AbstractAbout AuthorsReferences
When manufacturing, transporting and installing reinforced concrete products of large-panel buildings, cases of the crack formation in internal wall panels and floor slabs are not rare. The analysis of damages of internal wall panels and floor slabs shows that in many cases, carrying out constructive actions, it is possible to restore their bearing capacity, and provide their operational reliability. Often, in agreement with the design organization, builders make strengthening of damaged concrete products. However, at the same time they often take insufficiently substantiated constructive decisions. In some cases, these solutions are performed with an excessive reserve of strength and require a large consumption of basic building materials, in others – they are not reliable. For example, when strengthening the internal wall panels damaged by cracks, panels are taken in a metal casing from two sides. The disadvantage of such a design is its high cost, laboriousness, and in addition, the thickening of the walls due to the clips reduces the living area of the premises. Development of solutions to strengthen the internal wall panels and floor slabs, which will be simple, technological in execution and require minimal material and financial costs – is an urgent and important task. When developing methods of restoration of internal wall panels and floor slabs it is necessary to systematize cracks and damages on degree of danger, a configuration, their arrangement in a product, existence of a fracture in a plane, and other signs. The considered methods of restoration of these reinforced concrete products damaged by cracks have been tested on real objects of construction. The introduction of these methods when constructing large-panel buildings in the regions remote from the house-building enterprises and associated with the transportation of products to the facilities, can reduce the material damage of rejection of iron-concrete products, return to production a large number of products. The methods of strengthening of reinforced concrete products of large-panel buildings damaged by cracks, making it possible to restore their operational qualities are presented. Methods of restoration of reinforced concrete products (internal wall panels and floor slabs), damaged by cracks, are protected by copyright certificates and tested in practice.
E.F. FILATOV, Head of Construction Laboratory (This email address is being protected from spambots. You need JavaScript enabled to view it.)
A.V. IVANKOV, Engineer-Builder-Technologist

OOO SZ USK ”Nadezhda” (1, bldg. 11, Bezhitskaya Street, Bryansk, 214007, Russian Federation)

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For citation: Filatov E.F., Ivankov A.V. Strengthening of reinforced concrete products of large-panel buildings damaged by cracks. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2019. No. 3, pp. 47–52. DOI: https://doi.org/10.31659/0044-4472-2019-3-47-52 (In Russian).


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