Abstract
Multi-storey reinforced concrete frame buildings are widespread in Russia. Most of these buildings have braced frame system, where the main load-bearing elements are columns, beams and hollow floor slabs, and the spatial rigidity is provided by additional diaphragms, staircase and elevator section. Such buildings are easy to design and build and are quite multifunctional in purpose. The article on the basis of the authors’ experience in the survey examines the main defects in such buildings. The causes of typical defects can be divided into objective, technological and operational reasons. Usually, the cause of survey can be structural damage discovered by the building owner that is why often the survey is conducted during the emergency condition, which can be avoided, if inspections and monitoring of the structures technical state are regular. Also there is a necessity of improving the design methods of new buildings and strengthening of existing ones.
Highlights
Multi-storey reinforced concrete buildings of the uniform design are widespread in Russia
The most part of this kind of reinforced concrete building was built in the 80s and 90s of the 20th century
The building received uneven settlement, which resulted in the appearance of cracks and deflections of beams. As it became clear in the course of technical inspection, the situation was considerably aggravated by deviation from the project in the construction of foundations
Summary
Multi-storey reinforced concrete buildings of the uniform design are widespread in Russia. Frames of this kind of building are mostly built from precast elements – columns, beams, and slabs (see Fig. 1). The rigidity and stability of the building, as a whole system, is provided by the elements of rigidity – diaphragms, staircase and elevator section, as well as by floor structure, which transmit the arising horizontal forces to the frame and diaphragms. These buildings are simple in design and quite multifunctional in use – they could be used as industrial, office or public buildings. In this paper we will consider main causes of defects in reinforced concrete buildings with precast elements
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