Magazine of Civil Engineering, №8(18), 2010
Walling of buildings and erections


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Журнал "Бетоны - Сухие смеси"

H+H

Дополнительное образование по направлению Строительство

Всероссийская научно-техническая конференция «Строительная теплофизика и энергоэффективное проектирование ограждающих конструкций зданий»

Thermophysics of walling

December, 9th, in exhibition centre "Lenexpo" the 3rd All-Russian scientific and technical conference "Building thermophysics and energy effective design of walling of buildings" took place. The conference was held within the framework of International congress «Energy efficience in XXI century. Engineering methods of reduction of energy consumption in the buildings».  
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Неделя науки СПбГПУ

The theme of walling on the Week of science

The conference "Building thermophysics and energy effective design of walling of buildings" included the second day which took place  in Saint-Petersburg State Polytechnical University (SPbSPU). This day was in the same time one from the sessions of XXXIX international scientific and practical conference "Week of science at SPbSPU". This session was named "Energy effective walling". 
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ENERGY SAVING
К вопросу о расчете приведенного сопротивления теплопередаче ограждающих конструкций

A.D. Krivoshein, S.V. Fedorov
About the calculation of reduced total thermal resistance of walling

Walling of modern buildings are characterized by high thermotechnical heterogeneity. It causes difficulties in the calculation of their thermal resistance. The universal method for estimation of heat-protection properties is the calculation of thermal fields with using of appropriate software. In the article complicated elements of this calculation such as the choice of  rated operating conditions, level of detal of its decomposition, calculation results handling, features of calculation of particular nodes temperature regime are considered. 
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Влияние ориентации остекленных фасадов на суммарное энергопотребление жилых зданий

O.D. Samarin, N.N. Zaycev 
Influencing of orientation of glazed facades on general energy consumption of residential buildings

In the paper the nature of relation of energy consumption of residential buildings of mass development from orientation of their glazed facades on the parties of horizon is parsed. The computed results of power inputs for the heating season on the indicated technique for two reference buildings at their different orientation with allowance for and disregarding of energy saving measures are shown. An estimation of influencing of orientation of glazed facades for the term of payback of a complex of energy saving measures, used in buildings, is given. The guidelines on expedient dimensional orientation of the extended residential buildings from the point of view of heat saving in the cold season of year are offered. 
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CONSTRUCTIONS
Влажностный режим конструкции вентилируемого штукатурного фасада

S.S. Soloshhenko 
Humidity conditions of the external thermal insulation composite systems with the ventilated air gap

Influence of air permeability of provided ventilated air gap in ETICS on moisture conditions of the wall structure has been considered in this work. The method of calculation of such an influence is based upon the comparative evaluation of non-stationary humidity conditions of ETICS and humidity conditions of ETICS with the ventilated air gap. The results of the comparative evaluation show that humidity of render layer in case of ETICS provided with ventilated air gap reduces significantly in comparison with traditional ETICS.
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Конструктивное исполнение вентилируемого фасада повышенной надежности

A. S. Gorshkov, D. Y. Popov, A. V. Glumov 
Constructional approach of ventilated facade with increased reliability

The authors analyse the wall construction containing ventilated facade with  only one heat insulating filling layer  of AAC-blocks. This bond provides the required heat insulating level without additional external insulation layer. The suggested constructional approach requires the main backing up cantilevers of the venlilatd facade subsystem to be anchored in solid cast flooring plaques. The research presents the engeneering scheme of such wall construction. 
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MATERIALS
Проблемы эксплуатационной надежности наружных стен зданий на основе автоклавных газобетонных блоков и возможности их защиты от увлажнения

V.V. Babkov, D.V. Kuznetsov, E.V. Morozova, A.M. Gaysin, O.A. Rezvov, N.S. Samofeev
The problems of operational reliability exterior walls of a building based on the autoclaved aerated concrete blocks and possibility of their protection from moisture

The basic mechanisms and factors that have destructive effect on the state of autoclaved aerocrete in the exterior walls of operated buildings are shown. These mechanisms are wetting the wall, the effect of moisture during freezing, carbonation hydrosilicate structure-phase of material. The possibilities of protection exterior walls with using hydrophobic multilayered vapor permeable stucco are estimated.
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Определение огнестойкости фрагментов междуэтажного перекрытия на основе стальных С-образных профилей

D.E. Kolomiyczev, A.O. Rodicheva, V.A. Ry'bakov 
Estimation of fire resistance of inserted floor fragment based on steel C-shaped profiles

In the current article results of the fire resistance tests of inserted floor based on sheet steel profiles were described, analysis and comparison of the obtained results with other types of slabs were made. The test have shown that the fire resistance of fragment of this inserted floor is 47minutes, so the floor can be used in buildings with degree III of fire resistance (up to 5 floors with total area not more than 2000m2).
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CALCULATIONS
Проектирование каркасов зданий из тонкостенных холодногнутых профилей в среде SCAD Office

V.V. Yurchenko 
Designing of steel frameworks from thin-walled cold-formed profiles in SCAD Office 

This paper is devoted to computer-aided designing of steel frameworks from thin-walled cold-formed profiles. The main attention has been paid to the structural analysis and determination of the internal forces in structural members from thin-walled cold-formed profiles taken into account restricted torsion deformations. Some scientific issues under the buckling behavior of the profiles, as well as post-buckling behavior of these elements after the local buckling of the compressed cross-sectional parts has been presented.
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Математические модели задач нелинейной динамики вязкоупругих изотропных пластин и оболочек гладко-переменной толщины (асимметричные случаи)

R.A. Abdikarimov, V.M. Zhgoutov
Nonlinear dynamics problems: mathematical models of viscoelastic isotropic plates and shells with smoothly variating thickness (asymmetrical cases)

Thin-walled plates and shells are widely used in the modern construction as elements of both walling and bearing structures, intended for significant power loads. In the article the behavior of asymmetric plates and shells of variable thickness is considered taking into account jointly geometric nonlinearity and viscoelastic material properties.
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