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Archiv článků od 13.11.2017 do 26.11.2018

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26.11.2018
Erik Novák, MSc., Ing. Jan Včelák, Ph.D.

Historic buildings are often classified as highly energy-intensive buildings with low energy efficiency. Thanks to their overall percentage share in the European real estate market, it is logical to focus on these objects with an innovative approach and functional, sensitively aesthetic solutions, thus significantly reducing their energy intensity and increasing their energy efficiency. At the same time, it will enable to meet the new energy targets currently proposed by the European Commission.

6.10.2018
Ing. Jindřich Melichar, prof. Ing. Rostislav Drochytka MBA, DrSc.

Almost all types of building structures in our environment are affected by rising wetness. Especially in old historical buildings this could produce huge problem in the statics. One of the most efficient and suitable solutions of this problem is to create waterproofing injection screen in the base of the structure. This screen is realized by gels, that are injected into the lines of boreholes and subsequently penetrates the building material thus create the screen that stops water from rising above it further into the structure. To examine functionality of the injection gels and their ability to create injection screen in various types of building materials also various types of mason mortar must be tested, because of their ability to transmit the injection gel in its structure.

Výsledky měření koncentrace CO<sub>2</sub> v&nbsp;ložnici při přirozeném větrání oknem
10.9.2018
Ing. Petr Bohuslávek, redakce

The measurement of carbon dioxide concentration was made in my bedroom in February 2018 within one week. CO2 concentration during the night is evaluated under different ventilation modes. The results show a significant effect of ventilation on air quality. They prove that only natural ventilation through tight windows in current developmental residential buildings is inadequate.

20.8.2018
Ing. Antonín Lupíšek, Ph.D., ČVUT v Praze, pracoviště UCEEB

The paper describes actual trends in serial deep energy retrofitting of buildings in the Netherlands. A set of photographs presents several Dutch pilot projects of energy retrofitting of post-war family houses in Heerlen, Melick and Soersterberg to net zero energy level and of one multifamily residential building in Arnhem to nearly zero energy level. The retrofitting projects were made utilizing prefabricated thermal insulation wall modules with timber structural system (that included new windows) and prefabricated roof panels. All presented projects also featured replacement of energy sources and in case of the family houses also installations of photovoltaic systems replacing roof tiles.

23.7.2018
doc. Ing. Jaroslav Sandanus, PhD., doc. Ing. Kristián Sógel, PhD.

In the paper the refurbishment of riding`s hall roof structure is presented. The combined steel-timber load-bearing structure had visible and high horizontal deformations and the gable wall was pushed out of the building.In the frame of refurbishment the diagnostic survey, structural calculations of the original and the new stage of the structure and the proposal of refurbishment works were worked out.

18.6.2018
Ing. Zdeněk Vejpustek, Ph.D., doc. Ing. Bohumil Straka, CSc., doc. Ing. Jan Vaněrek, Ph.D.

This paper shows the process of restoration, of a historic wooden ceiling, using a “dry method” – interaction between historic timber joists that are mechanically jointed with wood-based boards.The paper describes reasons for choosing the method and principles of a good design. The experience of using this method on site is also described in this article.

28.5.2018
Ing. Pavel Rubáš, Ph.D., Technický a zkušební ústav stavební Praha s.p.

The article is focused on overshadowing of agricultural land by buildings. On this kind of land is not possible to apply the standard criterion according to ČSN 73 4301 Residential buildings that is suitable for determination of overshadowing of the recreational land. In that cases is necessary to use a far more complex calculations and predictions of overshadowing using combination with agronomical know how because in some cases is overshadowing of the crops even useful.

30.4.2018
Bc. Jakub Venzara, doc. Ing. Tomáš Matuška, Ph.D.

The authors describe the economic and technical connections related to the use of thermal solar water heating systems on the Czech market. This includes investment costs, grant titles, operating options, and an estimated lifetime that is roughly twice as high as the economic return.

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23.4.2018
Ing. Karel Mrázek

Description of the heating system according to the European methodology. The theoretical part is complemented by a description of the current state of the heating systems in residential buildings that the professional public encounters. In the article, the recommended data for the correct application of the method and design procedures for assessing the energy performance of heating is given. The processed topic will thus help to understand the influence of individual variables on the economical operation of the heating system and its final evaluation.

9.4.2018
Milan Markovič, Facility manager

The article explains some basic terms and obligations in the field of fire protection related to the activity and character of the association of owners of flats (or housing cooperatives) and ensuring fulfillment of obligations in the field of fire protection.

&copy; Fotolia.com
26.2.2018
Ing. Karel Mrázek

When rebuilding the HVAC systems, it is necessary to respect the implementing regulations which define the framework of the certified technical procedures. In a number of examples of practice, it shows the absence of these facts. The article deals with the implementing standards and recommendations for the assembly and acceptance process of heating systems. It is designed not only for assembly companies, but also for investors and administrators who take over the work and then use it.

Brilon a.s.
19.2.2018
Ing. Karel Mrázek

In the area of existing thermal energy supply systems, the processes of disconnection of existing heat consumers have been ongoing for a long time. The key point is correctness of the Energy Certificates. The article provides an example of a specific assessment of disconnection from central source heat supplier.

&copy;  adrian_ilie825 - Fotolia.com
5.2.2018
Ing. Karel Mrázek

The article deals with the economic assessment of energy saving measures as a further continuation of the topic of reconstruction of HVAC systems in apartment buildings. Selection of economical lifespan for selected elements and functional parts with preventive maintenance costs is provided. Finally, an example of the apartment building evaluation is given.

&copy; M-Rido - Fotolia.com
22.1.2018
Ing. Alena Horáková

The first article of the series on energetic reconstruction HVAC systems in residential buildings is focused on the preparation of project with minimum necessary information that should be prior to any commencement reconstruction. In current practice this part is significantly neglected.

Stavba stanice metra na Náměstí Republiky
25.12.2017
Ing. Tomáš Moravec, STACHEMA CZ s.r.o.

The article describes the beginnings of the use of the fly ash mixture for the production of concrete in the Czech Republic, its application on important buildings (Prague subway, Nuclear power plant Temelín) and impacts on the production technology.

Složitá rekonstrukce staršího bytového domu
18.12.2017
Ing. Jan Koláček, Ph.D., doc. Ing. Zdeněk Bažant, CSc.

In December of year 2016 has been finished the extensive reconstruction of the multi-family house built in the thirties of last century, located in the district Žabovřesky of the city Brno. Investor with architect desired the modern appearance of interior and facade of the house, which involved a number of difficult renovations and new structures that had to be consulted with structure engineer. The significant steps of the reconstruction of the multi-family house are described in detail in this contribution.

Analýza trvanlivosti preimyselných komínov &copy; Imperium Obrazu - Fotolia.com
13.11.2017
prof. Ing. Juraj Bilčík, PhD., Ing. Ivan Hollý, PhD., Ing. Natália Gažovičová

Industrial chimneys are civil engineering works, which in addition to static and dynamic effects, direct and indirect loads, are also exposed to significant non-stationary environmental loads. Analysis of their durability focuses on the evaluation of vertical cracks, corrosion of concrete and reinforcement, which have a decisive influence on the resistance of the chimney's shaft with regard to the ultimate and serviceability limit states, as well as their durability.


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