Determination of multistoried buildings stiffness properties in the inverse dynamics solution

Abstract

The article is devoted to the development of methods and evaluation of the accuracy of determining the horizontal stiffness of multi-storey buildings basing on the results of instrumental measurements of the self-induced vibrations parameters carried out with the help of high-precision instruments. The proposed studies are extremely relevant in estimating the unsoundness degree of the buildings that have passed a certain period of operation or buildings that have been subjected to severe exposure. The use of dynamic methods of load-bearing structure condition analysis has undeniable advantages, since it excludes the need for a detailed examination, often associated with the necessity to open the enclosing structures and evict the residents of the building. The advantages of using this approach are particularly evident in the survey of a large array of residential buildings that are in heterogeneous operating conditions and require rapid results. The practical application of the methods was tested in the survey of the high-rise apartment buildings of 1-335 series in the city of Irkutsk. However, the need to use dynamic models of small dimension in the evaluation of stiffness parameters makes it inevitable and urgent to solve the problems of assessing the accuracy of such approximations.

Modeling the Structural Strength of Materials on Disk Laboratory Specimens

“…The service life of modern structures, depending on operation purposes and conditions is assessed by static strength of the material, cyclic strength and crack resistance. It is known that with different stress-strain states (all-round compression, uniaxial tension, shear and complex stressstrain states), the strength criteria can differ [1][2][3][4][5][6]. For this reason, the type of SSS in the working area of laboratory samples of the material tested before destruction must coincide with the type of SSS in the focus of possible structural destruction.…”