The article is devoted to solving the problem of high-precision installation and alignment of kinematic supports on ball rolling bodies, a detailed description of the design solution for precise fixation of ball rolling bodies on a flat monolithic concrete foundation during installation of a seismic insulating support and describes the phased construction of all elements of kinematic seismic insulating supports in the underground part of a high-rise building.A system of seismic-insulating kinematic supports installed in the underground part of a high-rise building is considered. An improved method of high-precision installation of kinematic seismic isolation supports is proposed, which allows to increase the accuracy of installing a seismic support on a system of four rolling elements. The technology of mounting seismic supports on the zero cycle of construction of a high-rise building is described. The advantages are evaluated.

Keywords: high-rise structure, vibration damping, roller seismic vibration compensation system, seismic insulation, high-precision installation of seismic insulating supports

During the motion analysis (design, model, body) a certain amount of data in the form of accelerometer readings with increments of 0.001 seconds – about a million of lines. At any instance of time we have to solve the problem of determining the acceleration of specified point of the solid body, taken as the pole. Therefore, our goal is to reduce the time for each iteration for determining the acceleration of the given solid body pole.

Keywords: solid body, center of mass, instantaneous angular velocity and acceleration

In modern conditions developed and used hydraulic calculation of gas networks program. With them, you can get the pressure value at the nodes of the distribution system of gas supply, costs, and gas velocity in the settlement areas. But do not count in these economic aspects, ie, It is not determined the most economical option, which can be obtained by optimizing the individual characteristics of the gas network. These characteristics in the development of the concept of gas supply is a rational distribution points gas reduction and determination of optimal kolichestva.Priveden calculation of the optimal number of the PWG and the optimal diameter of individual sections of the network of medium pressure gas pipelines to ensure the best economic performance timing system. Defined pressure regulator bandwidth capacity for its stable operation. To determine the effect an increase in the inlet pressure on the diameter of the pipeline.

Keywords: optimum range, the optimum load, optimization of pressure, the diameter of the gas-supply circuit, the hydraulic calculation capacity pressure regulator.

Systems of passive damping of oscillations of high-rise constructions are considered. Their merits and demerits are revealed.  The roller  system of  oscillations indemnification  of the high-rise constructions subject to seismic influence is offered.  The principle of its work is described.  Advantages are estimated.

Keywords: high-rise construction, damping of oscillations, passive systems, roller system of indemnification, vibroisolation

The mixed finite element method has advantages over classical formulations of Lagrange and Castigliano, and ensures high precision and smoothness approximate solutions for strains and stresses.
In practice, using the mixed finite element method is limited by high size of linear equation systems, which leads to significant increasing time costs.
Using the orthogonal finite functions for approximating of unknowns leads to generation of sparse linear systems with a special structure.
That system can be simplified during solution.
This article proposes the algorithm of modificated Gaussian elimination for preliminary transformation an extended matrix of linear system.
This algorithm underlies software complex, which includes LISTSOLVER, the author's solver.
Confirmed the efficiency of created solver in compare with common-type solver.

Keywords: mixed finite element method, sparse linear systems, orthogonal finite functions, Gaussian elimination

The main maintenance of a  results of calculation of a thermointense condition of beams depending on various ways of an attachment to the basis - jammed in the basis, with absolutely hard sealing-off on end faces and absence of any communications at end faces is considered. The analysis shows, that the more age of "blocks-communications", the more they possess rigidity. It means, that they are less pliable, and sizes of pressure in the settlement block are close to pressure in the block with the jammed end faces.  

Keywords: Termointense, concrete, block, communication, support, suppleness, pinched, temperature, movement

Defined criteria for identification of defect parameters, on the basis of the analysis of the different modes of own fluctuations, with the use of finite element modal calculation console corpulent model of a rod with a single defect. Developed finite element model of a universal complex . Considered corpulent (3-d) model on the basis of 3D finite element Solid92. When solving the problem considered on 26 oscillation modes depending on the size of the defect and its location.

Keywords: Damaged, defective, swing, cantilever, frequency

The task of identification of defects in rods with different variants of fastening. In the basis of lies method parameter identification based on an analysis of the frequencies and parameters of natural modes of the structure. Built model of the rod design has defects fluctuations, using finite element of the complex 

Keywords: Defect, damage, rod, the oscillations of the cantilever rod

The article is devoted to the resistance accounts composite structures. The basis of the position of women variational energy principle. Considered potential energy flanging to calculate the stress-strain state of construction, consisting of a base of the form of hexagonal plates, rigidly connected to the base of circular cylindrical shells, the upper end of which is enhanced by the hexagonal crimping.

Keywords: plate, shell, variation-energy principle, the strength, the composite structure

Information about authors of issue №4 p.2 (2012)

Keywords: authors

Information about authors of issue №4 (2011)

Keywords: authors