Magazine of civil engineering, №7(9), 2009


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Журнал "Бетоны - Сухие смеси"
The day of Finnish energy audit in Russia

The day of Finnish energy audit in Russia

On November, 9th at Consulate general of Finland in Saint-Petersburg the seminar "A day of instruction in energy audit. The praxtice and the results of finnish programmes in the field of energy audit" was held. The representatives of finnish companies shared experience in new field which is new for Russia yet. 
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The low-rise construction in the Leningrad region

The low-rise construction in the Leningrad region

On November, 19th the Leningrad region Government with Saint-Petersburg Construction Centre conducted the conference "The developpment of low-rise construction in the Leningrad region, preparation of  the engineering infrastructure and  application of new building technologies". 
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SYSTEMS
About the necessity of effective climate systems in buildings

L.L. Goshka
About the necessity of effective climate systems in buildings

In the article the contemporary air conditions and their influence on the human organism are analysed. On the base of previous researches which were described in a series of articles (look issues №1-6, 2009), a conclusion about the necessity of effective ventilation systems is made and  the general recommendations are given.
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About the elaboration of municipal sewerage in Ufa

V.M. Vasil'ev, A.V. Malkov
About the elaboration of municipal sewerage in Ufa

In view of the active developpment of Ufa, including the field of construction, the reconstruction of municipal sewerage was decided to do. The project was conducted by a company from Saint-Petersburg. Project's particular qualities are described in the article. The main innovational element of this sewerage is the common system of tunnel collectors.
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V.S. Slepchenok, G.P. Petrakov
The contemporary heat supply system of Saint-Petersburg and its possible modernizations

The contemporary heat supply system of Saint-Petersburg based on on the radial metal pipe network is considered. It is characterized by high damageability, big heat loss and as a consequence by insufficient economy of water heat systems in the maintenance stage. The energy saving and economical technologies for the reconstruction of heat networks are given. 
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Concrete heaters

A.A. Frolov
Concrete heaters

In the article the possible use of concrete heaters in the building heating systems is considered. The results of computer simulation and thermotechical tests of several concrete heaters samples are given.
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INTRODUCING OUR COLLEAGUES

Institute BelNIIS, Minsk, Belarus

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TECHNOLOGIES
Shrinkage deformations of the concrete modified by chemical and fine
mineral additives

D.S. Kotov
Shrinkage deformations of the concrete modified by chemical and fine mineral additives

The influence of the different plasticizers, fine mineral additives and water on the concrete shrinkage deformation is given it the rasults of experimental research. The adjusted mathematical modelling of the concrete shrinkage deformations are produced. The modified concrete shrinkage value i s described in connection with the type of the used cement, type of chemical modifier, concrete mobility index, compression strength of the concrete in the age of 28 days.
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Pipe protecting screen use in the construction of underground
structures in Saint-Petersburg


O.M. L'vova, K.U. Pavlovich
Pipe protecting screen use in the construction of underground structures in Saint-Petersburg

In the article the arrangement technology of protecting screens used for the underground construction in the compact urban planning is analysed. Different erection methods are considered, the construction of this screen round the highway tunnel in Saint-Petersburg is given as an example.
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METHODS
Ultrasonic method used for the estimation of damage zone in reinforced
concrete after the fire

A.V. Ulybin, S.D. Fedorov
Ultrasonic method used for the estimation of damage zone in reinforced concrete after the fire

Ultrazonic method of construction inspection is considered by the example of a building damaged by fire. The method lies in the determination of concrete strength in every point of sample by the velocity of ultrasonic waves passing. The methods and results of measurements are described. 
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CALCULATIONS

I.A. Voilokov, A.M. Gorb
The calculation of industrial floors sructures adjusted for the dynamic force of loads from hosting transport moving

Often the influence of handling machinery is one of the most important in the calculation of industrial floors. The authors conducted theoretical studies and got corresponding solutions and formulas. The necessity of taking into account of these influences when constructing the floors is proved.
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V.M. Zhgoutov
Mathematical modelling of orthotropic and isotropic ribbed shells deformation taking into account the creep of material

When investigating the mode of deformation and stability of shells under the action of sustained load it is necessary to take into account that with time the creep property becomes apparent in the material. It leads to the decrease of real load carrying capacity discovered in the elastic behavior of material.
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V.M. Zhgoutov
The durability and stability of the elastic orthotropic and isotropic ribbed shells. I

Often thin shells are reinforced by ribs to increase its rigidity. When investigating the stability of these shells it is important to conduct the verification of their durability as nearby the buckling loads the stress level for the majority of materials exceeds the permissible level.
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