Applied Mechanics and Materials Vols. 725-726

Abstract: In this paper the Galerkin method are used to obtain approximate solution to the stochastic beam bending problem. The present method is used to analyze the static deflection of beams. The uncertainty is represented as a parameterized stochastic process. Galerkin’s method selects the weight function functions in a special way: they are chosen from the basis functions, i.e. w(x)Î{ji(x)}, ni=1. It is required that the following n equations hold true. From the approximate solution, first and second order derivatives of the response are used. This paper solves the problem of strength and safety evaluation of a linear extended structure lying on a statically inhomogeneous foundation and presents an engineering analysis method.This paper solves the problem of strength and safety evaluation of a linear extended structure lying on a statically inhomogeneous foundation and presents an engineering analysis method.

Abstract: In this paper was presented analysis of the background and was found the most appropriate ways to consider joints stiffness. The design process algorithm is proposed in order to take into account nonlinear stiffness characteristic, complex of economic, ecologic and safety factors for the different joint types.

Abstract: Two types of prestressed cladding elements for the long span cable roofs were investigated. The first considered type of prestressed cladding element was pneumatic and formed by the generally woven by the basket weave fabric from the Vectra (LCP) yarns, which is covered by the PoliTetraFluoroEthylene (PTFE) copolymer foil, and compliant contour, consisting from the several glued together layers of the mentioned covered fabric. The second considered type of prestressed cladding element was formed by the steel cables steel pipes and the same type of covered fabric as the first type. Rational from the point of view of materials consumption heights and levels of prestressing for two considered types of cladding elements were evaluated.

Abstract:

This paper includes buckling analysis of reticular-stretched steel cold formed profile web as a single plate based on classical theory of elasticity. Numerical method used throughout the research was finite-element method (FEM). Results of the research have good correlation with tests.

Abstract: In this work we propose a new method of heat treatment of the masonry in the winter and the algorithm flow management masonry that reduces overall construction time of the building. Under the proposed algorithm calculating the heat treatment of masonry in winter conditions with stationary heating house developed software that automates the thermal engineering calculations and the necessary organizational and technological parameters of the organization of building flow, which greatly optimizes the performance of the project

Abstract: Stress and strain state of hybrid (combined) systems including flexible and rigid elements is studied in the article. Theoretical approach is presented. The feature of the systems studied is described, i.e. structural nonlinearity. Numerical analysis is presented. It is pointed out that vibrations of such structures upon conditions of resonance differ from those of classical bar structures, i.e. if for rigid bar systems the amplitudes of vibration at resonant disturbance increase monotonously, in combined (hybrid) system alternate switching off tie-bars stabilizes the amplitude of vibration at a certain value and transfers vibrations in the beating mode that can be considered as an internal vibration absorber.

Abstract: In the framework of ultimate state calculation methods the paper presents some propositions for stress-strain state, crack resistance analysis and failure state of reinforced concrete structures with corrosion damage at supports. The work concerns the durability of concrete and reinforced concrete elements with corrosion damage. The theory for reinforced concrete with corrosion damage is presented for plane stress state

Abstract: The objective of this work is to identify and make an analysis of correlation between functions of bimoments and function of bending moments arising in the beams under the same loads. This article shows the possibility of using a diagram of bending moment multiplied by a factor as a diagram of bimoment. The maximum deviation between diagram of bending moment and diagram of bimoment made up 3.6 % of maximum bending moment in case of uniformly distributed load on one side of fixed supported beam.

Abstract: The influence of local buckling on the bearing capacity of light steel thin-walled profiles is a hot topic today. In this paper we evaluated the effect of the thickness of the elements of the cross section on bearing capacity the profile in a transverse bending.

Abstract: The paper describes the creation of the arched frame structures made of brittle material. Pasta were chosen as the base material. Their basic geometrical and mechanical characteristics were evaluated. Finite element analysis of the pasta frame structure was made in SCAD and ANSYS. The internal force factors arose in the structure were compared. Its actual carrying capacity was determined in virtue of the structural solidity and material`s experimental evidence. Also the features of optimized structure design were found, the assembly process was described, the test results of the construction were presented. The comparison of the results of finite element modeling and actual laboratory tests was done.