Applied Mechanics and Materials Vols. 725-726

Abstract: In the article the brickwork joints effect on the thermotechnical uniformity parameters of the walls of gas-concrete blocks are considered. The additional thermal energy losses through joint masonry are calculated.The recommendations to reduce the brickwork joints effect on thermotechnical uniformity of external enclosure structures are offered.

Abstract: The article presents the methodology of thermal balance equation generation for cold attics. This methodology is aimed to provide the scientific basis for engineer activities to prevent the ice hillock building-up on roofs during the periods of the lowest temperature of outside air. The complex of actions that leads to reduction of damages from buildings of thermal energy is listed, heating up to improvement of parameters of a microclimate in the operated rooms of the top floors of buildings. For realization of these actions any materials and technologies providing the necessary level of thermal isolation for the concrete building and satisfying to the fire-prevention and sanitary and hygienic requirements existing in the territory of the Russian Federation are used

Abstract: In developed countries only loss of property because of fire makes annually up to 2% of their national income [9, 15]. The bearing capacity of reinforced concrete structures at high temperature impact is lost within several dozens of minutes [1, 3, 5, 10, 12, 18, 25]. Disappointing statistics of increase of both the number of fires and the scope of damage due to them aggravates the actual problem of determination of reinforced concrete structures fire-endurance. The main problems and methods of evaluation of reinforced concrete structure fire resistance are stated. Within the framework of block approach to evaluation of strain of flexural reinforced concrete elements with cracks, design model of reinforced concrete thermo-force resistance is made. Extended nomenclature of influences of high temperature at fire on decrease of performance of bearing reinforced concrete structures is considered. Empirical dependencies of strength and strain characteristics of concrete and reinforcement on high temperatures are used. Proposals on specification of evaluation of fire resistance of statically indeterminate reinforced concrete structures are formulated.

Abstract: The results of numerical simulation of heat and mass transfer in a low-temperature insulation in conditions of insulation freezing, a moisture migration to the front of phase transition and a condensation forming on an outer contour of interaction were obtained. Values of heat leakage were established.

Abstract: Transparent structures are widely used in the construction of modern high-rise buildings. It is necessary to consider a number of important features in selecting of suitable design of the construction. These are energy efficiency, durability, simplicity of installation, exterior of the building, cost of the construction and payback period. The aim of this work is to determine the most appropriate transparent structure for high-rise buildings with a fully glazed facade according to these requirements. Accomplish this aim such challenges as comparison of characteristics of different methods of glazing, energy efficiency and cost-effectiveness problems were figured out. Basing on this comparison, most suitable transparent structures for the various priority factors have been identified.

Abstract: This work is devoted to description the outset of research the modern thermal shielding systems on the model of house, and desired outcome. Results can be basement for modernisation of building regulation, in prospect. Experiment consists in tests conducting and drafting of troubleshooting guideline.

Abstract: Double skin facades very popular in this time. They are applied for construction of new buildings and for reconstruction. But double skin facades contains some defects. In the present paper concrete constructive changes in a design of the Double skin facades which are offered. This changes will can to normalize heatmoisture conditions in the building. All proposed solutions are proved by theoretical calculations and numerical simulation.

Abstract: The topic of the article regards to the development of new SP 50.13330.2012 «Heat protection of buildings» actualized edition of SNIP 23-02-2003. The article focuses on the reduced thermal resistance, which takes into account the influence of thermally conductive inclusions by the coefficient of heattechnical uniformity.

Abstract: In this article the influence of external temperature fluctuations on temperature of the enclosure structures are defined, a selection of optimum heating system for thermal energy saving are offered, thickness of penetration layer of a temperature wave are defined. Fourier's differential equation of heat conductivity process in a solid body is solved and analysed.