Itskov I.E.
Itskov I.E.

Itskov I.E.
канд. техн. наук, зав. лабораторией сейсмостойкости зданий повышенной этажности АО «КазНИИСА» (г. Алматы)


Publications


Issue: №4 2018
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Design Decisions of Precast Concrete Frame «Shymkent-FID» and the Results of the Dynamic Tests
Issue:
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This article presents the design decisions of precast concrete frame «Shymkent-FID» and the results of the dynamic tests, clearly showing that a return to the «well-forgotten old» shall be based on the latest achievements of engineering and technology, is able to revive the design of the system, which has been effectively recognized back in the 70’s of last century. 

Methods of analysis of results of vibration tests of buildings and largescale facilities

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Design seismic loads on buildings and structures can be determined by two methods: on the basis of the response spectra method and by time - history analysis using of real or synthesized accelerograms of earthquakes. In recent years to identify the actual strength, deformation and dynamic characteristics of buildings and structures in the process of deformation tests of actual objects have been widely used.
The authors propose a method of approximate analysis of the results of vibration tests, which is based on the spectral approach, which in terms of practical usage has a number of significant advantages as compared to others methods.
For the first time the concepts of “diagrams of system parameters changes in the process of inelastic deformation” (hereinafter referred to as “parameter diagrams”), “reaction spectra of conditional linear dissipative-unsteady systems” and “spectrum of states” of systems with changing dynamic characteristics are introduced in the paper.
To substantiate the proposed method of assessing the results of vibration tests, the analysis of experimental data obtained in the process of experimental studies of large-scale facilities of threedimensional buildings was performed.