Banakh A. Influence of the dynamic forces affecting durability and comfort of buildings exploited in difficult engineer-geological conditions

Subject of inquiry are buildings exploiting in difficult engineer-geological conditions under dynamic influences. Thesis objective of researches is a change of dynamic parameters of elements of calculation models of buildings. Purpose of dissertation work: development of methods of the specified calculation and prognostication of work of buildings due to conditions of strength and comfort on the basis of forming of their calculation models. Research methods: theoretical and experimental methods of theory of vibrations and dynamics of buildings, numeral methods of building mechanics, finite elements method for a calculation and testing of dynamic models. In experimental research there were used next devices: vibrometrical complex, recommended in VSN 490-87 and consisting of I001 sensors, variplotter EК IT-04 (allowing to register displacements in a range 2-30 Hz) and electronic digital vibrometer BIP-7. Theoretical and practical results: providing of adequate design of the dynamic affecting buildings with the purpose of their reliable and accident-free exploitation. This methods allow to conduct the correct estimation of the stress-strain state, to prognosticate the conduction of buildings under different dynamic loadings and also to determine the borders of comfort in accordance with sanitary norms. The engineering methods of account of dynamic influences, transmissible through soil, provide the necessary level of exactness and reliability of calculations. This method as a complex of recommendations for drafting of dynamic calculation models is ready to use in design and scientific organizations. Novelty of the research: for the first time the methods of forming of dynamic calculation models of buildings exploiting in difficult engineer-geological conditions are created; for the first time the dynamic calculation models of co-operation of buildings with grounds, taking into account initial deformations of buildings from the uneven sinking of grounds, are offered; influence of dynamic characteristics on the parameters of the stress-strain state of buildings is shown; recommendations for drafting of calculation models with dynamic influences at the reconstruction of buildings wih the normative requirements of durability and comfort are worked out. Implementation extent: the conducted researches underlay in p.8.4 of DBN В.2.1-10-2009 "Grounds and foundations of buildings", dissertation results are used in building practice of DNIISK scientific institute, Zaporizhzhya State Engineering Academy, Zaporizhzhya aluminium combine, "Fort" LTD. building company, "My House" design firm and also inculcated in the educational process in Zaporizhzhya State Engineering Academy. Range of application: dynamic calculation of constructions of buildings on the stages of design, building, exploitation and reconstruction.