Fedchenok O. Stress-strain state of structures of 9-storey large-panel buildings of model series under its reconstruction with soil subsidence

The object of research is the stress-strain state of serial buildings bearing structures with test calculations under conditions of insufficient data about the constructive changes made during the entire period of exploitation. The goal of the thesis is the identification of the stress-strain state features changing of 9-storey serial buildings bearing structures exploited on the subsiding soils with insufficient data about the constructive changes made during the entire period of exploitation. Methods are: a systematic approach; classification; idealization, analysis and modeling that is used for the forming of adequate computation models. Theoretical and practical results: computation model for the identification of the stress-strain state features of 9-storey large-panel buildings in dependence of the reconstructive changes made during the entire period of exploitation on the subsiding soils is improved; principles of considering of full available data based on the field surveys results of constructive changes with test calculations of 9-storey large-panel buildings during the exploitation on subsiding soils are justified; new data of numerous experiments of the bearing structures the stress-strain state changing of 9-storey large-panel serial buildings exploited on the subsiding soils are obtained. Scientific novelty: features of the bearing structures the stress-strain state of 9-storey large-panel buildings exploited on a subsiding soils in the dependence of the reconstructive changes are revealed for the first time; the quantitative regularities of available data about the constructive changes obtained by the results of field surveys and calculations of constructions the stress-strain state of 9-storey large-panel serial building exploited on subsiding soils are identified for the first time; principles of considering the data provided by the results of field surveys of the existing constructive changes with test calculations of 9-storey large-panel buildings during the exploitation on subsiding soils have been further developed and justified. Degree of introduction: researched methods are implemented in practice activity of Zaporizhzhia Department of State Enterprise “Research Institute of Building Constructions”, Research and Production Company “My House” LLC, Diagnostic Laboratory of Building Constructions Strains of Municipal Enterprise “Osnovanie” and the Chair of Urban Construction and Development of Zaporizhzhia State Engineering Academy. Scope of use: calculations of 9-storey large-panel serial buildings during their reconstruction.