Discusses the calculation of stress-strain State of glued structural sheathing to the test to determine the calibration of the test stand

Keywords: Finite elements method, Stress concentration, Skin, Test, Prediction.

The representation of solutions for problem of steady state vibrations of multilayered poroelastic half plane is considered using the superposition of corresponding solutions for homogeneous poroelastic environments. This allows to analyze the influence of individual structural layers on the forming of displacement and stress fields and also give the analysis of energy streams with the refraction boundaries and wave types separation

Keywords: multilayered half space, steady state vibrations, Biot environment, superposition principle

In the article, which is a review, the question about the use of library materials in the design of pile foundation in subsidence soils. Topic is relevant for engineers faced with the design of buildings and structures on the subsiding soils. States the reason for the consideration of the designated theme, coming out of the normative documents, as well as from the practice of static load test of piles. The task is the possibility of using library materials field test piles taking into account features of the static sounding in an environment where it may be difficult, as well as in combination with the results of the full sample or engineering-geological researches, modern methods of calculation (numerical methods, CAD, etc.) and geophysical data.

Keywords: Library materials, static sensing, subsiding, survey

The possibilities of the vibration method changes the curve oscillation localization damage concrete structural elements with prestressed reinforcement. This article discusses a method for curve oscillation example concrete slab in terms of spatial, complex stress state under the action of vertical force Q.

Keywords: Vibration diagnostics, fault detection, diagnosis, design, construction span, reinforced concrete, concrete, reinforcement, prestressing.

The possibilities of waveguide elements realization in the structure of multilayered integrated chips of centimeter and millimeter ranges with SIW (Substrate Integrated Waveguide)-technology application are considered. The approaches allowing effectively using in new structures the algorithms and techniques of the electrodynamic analysis and synthesis of passive devices on classical all-metal waveguides are offered. Advantages of use in SIW structure the waveguides of complex cross-section are considered on the example of the microwave band-pass filter.

Keywords: A.A. Gadzieva, V.V. Zemlyakov, S.V. Krutiev

Information about authors of issue №4 (2013)

Keywords: authors

The article investigates the impact on the normal stresses of inequality of the young modulus for tension and compression in the bending of reinforced beams. Obtained formulas for determination of the bending moments that arise in the fixture, compressed and stretched zone of the aggregate. Found the formula for the normal stresses arbitrarily supported reinforced beams, arbitrary cross section and arbitrarily loaded bending loads. For example, reinforced beams of rectangular cross-section shows the determination of the neutral line and maximum stresses.

Keywords: reinforced beam, elastic modulus, stress, normal concrete

This article discusses the definition of the bearing capacity of piles to strengthen the base of the building, with the considering differential settlement, with formulation of a  nonlinear problem of a residential building in Belovo, Kemerovo region. These results were used at develop methodology for restoration of buildings and structures on the basis of monitoring  

Keywords: differential settlement, bearing capacity of piles, physical nonlinear formulation, finite element method

  The features of the construction of effective solutions to the problems of excitation of multi-media internal sources of oscillations. Examples of numerical calculations of the displacements and strains in the environment depending on the position of the source and observation point.

Keywords: many layers of base, internal source, harmonic oscillations

The problem of a radial compressive stress in the sample to assess their impact on the parameters of these stresses pressing indentors

Keywords: Diagnostics, resource efficiency, mechanical properties, strength, ductility, hardness, toughness, nondestructive testing, destructive

We consider the problem of pressing a conical indenter in pre-compressed radial force elastoplastic medium. The influence of the initial stresses on the parameters of the indentation.

Keywords: Diagnostics, resource efficiency, mechanical properties, strength, ductility, hardness, toughness, nondestructive testing, destructive

The algorithm of calculation of embedded foundation with combined use of a method of boundary elements and method of finite elements is considered. The calculation example of embedded foundation lying on a layered half space is resulted. Distributions of displacements under the base depending on frequency of influence and a combination of physical parameters of elastic layers and elastic half space are analyzed.

Keywords: dynamic, vibration, frequency, ceiling, half-space

  Requirements for methods of diagnosing design increases - they should make it possible to fully assess the performance of buildings, as well as being simple and mobile, to be used during the construction, operation, maintenance and reconstruction. This work is devoted to the realization of experimental and theoretical methods for vibration monitoring of structures and the analysis of the results. The objects of study are the reinforced concrete beams and slabs, and the subject of the study - the methods of vibration diagnostics, the principle of which is to detect changes in the construction of the main dynamic characteristics. Research has shown that damage to the structure can be detected by the methods considered, using a relatively small number of monitoring points and subject to change only the fundamental mode of vibration.

Keywords: Vibrodiagnostics, flaw detection, diagnostics, construction, beam, plate, defect, damage, vibration

Information about authors of issue №3 (2012)

Keywords: authors

Information about authors of issue №3 (2013)

Keywords: authors