Magazine of Civil Engineering, No.8(68), 2016


M.P. Sainov, O.V. Anisimov
Stress-strain state of seepage-control wall constructed for repairs of earth rock-fill dam

Methodology and the results of numerical modeling of stress-strain state (SSS) of an earth-rockfill dam are considered, where after a failure of the clay core there was created a new seepage-control element presented by a clay-cement concrete wall. Calculations were conducted on the example of the dam section of Kureyka HPP, where emergency situation occurred in 1992.
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V.A. Kostenko, N.M. Gafiyatullina, A.A. Semchuk, M.I. Kukolev
Geothermal heat pump in the passive house concept

An actual problem is reducing the cost of engineering systems maintenance of buildings and constructions. These costs include transportation of energy resources from source to consumer, complexity of the heating systems, caused by a large amount of equipment, and as a consequence, the presence of excessive heat losses. One solution is construction of buildings that meet modern energy efficiency requirements.
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R.A. Nazirov, S.V. Verkhovets, I.S. Inzhutov, R.V. Bazhenov, I.V. Tarasov
Moisture sorption models for wood

While making calculations for non-steady heat-and-moisture exchange processes in building envelope constructions it is necessary to consider moisture sorption isotherms of the materials in use. Fifteen aqueous vapor sorption models have been analyzed in order to select the simplest one that represents conventional equilibrium wood moisture values in the most accurate way.
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E.A. Bondarenko, Kh.V. Il`ina, M.Ju. Andrianova, A.N. Chusov
Main inorganic ions and electric conductivity of polluted urban streams

Concentrations of main inorganic ions were determined in waters of city streams affected by domestic and industrial wastewaters – the Okhta and the Murinsky creek in St. Petersburg. It was shown that pollution of streams led to increasing of molar fraction for sodium ion and chlorides, decreasing of molar fraction of magnesium, calcium, sulfates and hydrocarbonates.
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A.N. Ponomarev, A.S. Rassokhin
Hybrid wood-polymer composites in civil engineering

The interest in wood-based materials and structures is increasing every year, and as a result, attempts are constantly being made to modify it, in order to increase mechanical and operational characteristics. In this case the complicating circumstances are the contradiction between the hydrophilic nature of wood and water repellence of the majority of the thermosets that can significantly affect the properties of wooden parts and structures..
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A. Borodinecs, J. Zemitis, J. Sorokins, D.V. Baranova, D.O. Sovetnikov
Renovation need for apartment buildings in Latvia

Residential buildings in Latvia are one of the essential heat consumers during the heating season. The majority of Latvian as well as European residential buildings were constructed within the period from 1965 to 1990. Introduction presents brief overview of current situation in Latvian and EU countries. This chapter provides overview of real energy consumption and definition of buildings technical conditions.
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I.Yu. Bilous, V.I. Deshko, I.O. Sukhodub
Building inside air temperature parametric study

Nowadays energy resources saving problem is extremely important, especially for heating in buildings. The aim of the paper is to simulate indoor air temperature depending on heating rate, solar heat gains, infiltration rate and outdoor air temperature. In order to get the desired result dynamic model of the room was created in EnergyPlus program, which is a widely used building energy simulation program.
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L.O. Larsen, V.V. Naruts
Self-compacting concrete with limestone powder for transport infrastructure

At the beginning of XXI century in civil engineering and buildings of transport infrastructure, such as tunnels, elements of bridges, viaducts and roads, it is more expedient to use conventionally vibrated concretes which have almost universally replaced prefabricated constructions. However, in objects with high congested reinforcement or in cases where vibration is impossible it is more preferable to apply self-compacting concrete (SSC) mixtures. SCC possesses the ability to take form shape without any mechanical aid.
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E.A. Statcenko, A.F. Ostrovaia, T.A. Musorina, M.I. Kukolev, M.R. Petritchenko
The elementary mathematical model of sustainable enclosing structure

Energy efficiency building envelopes (walls, floors, facades) should meet the requirements of regulatory documents. The main attention is paid to structural and technological activities aimed at increasing the thermal resistance of protections. Estimates of the thermal stability of the wall are required for realization of high thermal resistance of the wall structure. The object of study is a simple model of the building envelope.
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