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Archiv článků od 27.11.2020 do 28.3.2022

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28.3.2022
Ing. Miroslav Urban, Ph.D., Ing. Jan Vitouš, Jan Kuldan

The first part described the real course of heating and electricity consumption by radiant panels of two family houses with different uses. In this part, the houses are compared in terms of the parameters of their indoor environment and in relation to the measured energy consumption and their energy intensity.

21.3.2022
Ing. Miroslav Urban, Ph.D., Ing. Jan Vitouš, Jan Kuldan

The first part of the article describes the real course of heating and electricity consumption by radiant panels of two family houses with different approaches to their use. In the second part, the houses will be compared in terms of the parameters of their indoor environment in relation to the measured energy consumption and their energy intensity.

17.2.2022
Ing. Jana Budajová, Ing. Silvia Vilčekvá, PhD., doc. Ing. Peter Mésároš, PhD.

The construction industry is the primary source of environmental impacts, especially the carbon footprint. Life cycle assessment (LCA) as an analytical method is used for quantifying the environmental impact of the investigated residential building. Life cycle costs (LCC) from the point of view of the circular economy create an economic model prioritizing reuse and recycling. The aim of this paper is to assess the residential building in terms of carbon footprint, using LCA analysis and circular economy, using LCC analysis. The residential building emits 1 756 tons of CO2e , which represents 41.35 kg CO2e/m2/year. The total estimated life cycle cost of the building in nominal terms is 1 694 699.61 €. This is the average total life cycle cost of 1 995.21 €/m2.

28.1.2022
doc. Ing. Petr Horák, Ph.D., VUT v Brně, Fakulta stavební, Ústav technických zařízení budov

The article deals with the principles of calculating the monthly method of supplied energy for heating. Describes in a clear form the individual mechanisms of calculation according to the relevant standards. It is designed for the needs of energy specialists and the professional public.

26.1.2022
doc. Ing. Petr Horák, Ph.D., VUT v Brně, Fakulta stavební, Ústav technických zařízení budov

The assessment of the energy performance of buildings depends on a large number of calculations, which must comply with the applicable legislation. The article presents the related structure of legal regulations, including standards and their brief characteristics.

Analýza mobilního laserového skenování ve stavebnictví
29.11.2021
Ing. Jakub Nosek, Ing. Petr Kalvoda, Ph.D., Ing. Michal Kuruc, Ph.D.

Mobile laser scanning (MLS) is currently commonly used in many surveying applications. The refinement of MLS point clouds is usually done by increasing the number of control points (CP) equally distributed within the mapped area. The accuracy of point clouds can also be improved by multiple passes of the mobile mapping system (MMS). This paper deals with the proposal of a suitable procedure by which it would be possible to remove local deformations of MLS point clouds. The proposed approach is based on the comparison of point clouds from multiple MMS passes. Additional CPs are then added to the places where the more significant differences between the point clouds.

10.11.2021
Ing. Zdeněk Poloprutský, ČVUT v Praze, Fakulta stavební, katedra geomatiky

This paper deals with the possibilities of using modern measurement methods and technologies, i.e. ground-based laser scanning (TLS) and Image Based Modeling and Rendering (IBMR), Geographic Information Systems (GIS) and Building Information Modeling (BIM) for processing, distribution and archiving of data collected during the Building Archaeology Survey (BAS). The paper tries to briefly summarize the current state of the author's knowledge and his practical experience with the issue.

25.10.2021
Ing. Barbora Junasová, doc. Ing. Michal Krajčík, Ph.D., Ing. Martin Šimko, PhD.

High quality of the indoor environment expressed by indicators such as air temperature, relative humidity, concentration of carbon dioxide, or lighting has great impact on human health, comfort and performance. Therefore, the contribution focuses on the effect of an increase in indoor temperature on energy consumption.

18.10.2021
prof. Ing. Dušan Petráš, PhD., Stavebná fakulta STU Bratislava Katedra technického zariadenia budov

The author describes a systematic procedure leading to the processing of the audit and provides an overview of the necessary documents. The elaboration of the audit and the implementation of the proposed measures is a basic prerequisite for savings. Without subsequent evaluation of results and adjustments of operating modes, etc. however, the expected savings effect may not occur.

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11.10.2021
Ing. Augustin Sadílek, Ing. Vlastimil Vala, CSc., Ing. Filip Hakl, Ing. Eva Mačurová MBA

As of 1st January 2021, an amendment to the Property Valuation Act and an amendment to the Valuation Decree also entered into force. With the amendment of these valuation regulations, there were fundamental changes in the valuation of easements. In this paper, we deal with the introduction of the new wording of these regulations concerning the valuation of easements and also the individual types of prices at which easements can be valued.

26.7.2021
Ing. Gabriela Bariczová, Ing. Ján Erdélyi, PhD.

The paper briefly deals with building information modelling and creation of digital twins of buildings using modern techniques of spatial data collection (TLS). It describes an algorithm for automated verification of the building's structures. It presents algorithms for automated difference model creation between the BIM model and data obtained from TLS or photogrammetry. The results are used to verify the geometric parameters of structural elements (such as flatness of walls, straightness of pipes etc.), as well as to determine deviations in their location (position and orientation from the project itself). The information obtained is a basis for the qualification and quantification of deviations during construction management.

16.5.2021
Ing. Michal Brandtner, Ing. Adam Boháček

The article deals with the data structure for the purpose of Life Cycle Assessment (LCA) of buildings using the Building Information Model (BIM). LCA is a method that can be used to demonstrate the suitability of proposed materials, structures, or buildings in terms of their whole life cycle and its environmental impact. For the LCA evaluation it is crucial to obtain life cycle inventory (LCI) input data. The aim of the article is to define a BIM data structure for LCI purposes. The new methodology is based on standardization of non-graphic information model data structure called SNIM. Advantages of the proposed methodology have been demonstrated on the case study. These results are useful for expanding the BIM model with new data necessary for further LCA calculations.

ilustrační foto: Main Point Karlín © TZB-info
30.4.2021
Ing. Zuzana Mrňová, VUT FAST Brno, Ústav stavební ekonomiky a řízení

A responsible approach to the environment is not only related to corporate ecology, but is also increasingly reflected in the design and construction of buildings, which is closely related to the concept of sustainable construction of buildings. With the development of sustainable construction, the need arose to evaluate buildings and their impact on the environment. For this reason, environmental certifications of buildings have been developed, which assess how a building affects its surroundings during its life cycle.
The aim of this article is to find out which environmental certifications exist in the world and which of them are most often used in the Czech Republic. Finally, the certifications are compared and their main differences are described.

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19.4.2021
prof. Ing. Ivan Vaníček, DrSc., Ing. Daniel Jirásko, Ph.D.

Very quick process of digitalization in civil engineering is progressing also in the branch of geotechnical engineering. BIM is a part of this process. Mutual interconnection of the 3D model of ground with the 3D model of the geotechnical structure can help to give more clear view on the interaction of this structure with ground. However, at the same time it makes possible better control for all participants of the construction process, particularly if all conditions of this mutual interaction are fulfilled. Whether the main aim of the construction process – that the care devoted to the individual phases of the structure design and execution correspond to the risk with which this structure and ground are connected. Within this context a closer specification of the Eurocode 7 of the second generation will be specified, as it counts with different models.

26.3.2021
Ing. Ondřej Nespěšný, Ing. David Jun, doc. Ing. Jan Pěnčík, Ph.D., Ing. Zuzana Fišarová, Ph.D.

The Helmholtz resonator is one of the most widely used low and medium frequency attenuation acoustic absorbers. While commercial products usually offer efficiency across almost the entire spectrum under consideration, in many cases only the specific natural resonance of the room needs to be suppressed. In such cases, it is necessary to proceed with your own design. This paper presents one of the possibilities of calculating a perforated resonator using the electro-acoustic analogy and the transfer matrix method. This method is not demanding on computing power, but nevertheless it is rarely used in current building-acoustic practice. This paper focuses on the comparison of the calculation of the sound absorption coefficient by this method with the data measured in the reverberation room.

22.3.2021
Ing. Libor Šteffek, Ph.D., Ing. Jiří Kalánek, Ph.D., prof. Ing. Milan Ostrý, Ph.D.

The paper deals with the energy balance of windows for different combination of glazing parameters in connection with their orientation. Sum of solar gains through the transparent surfaces of a building envelope depends mainly on the size, their orientation and the g-value. Large glazed surfaces with correct orientation ensure large solar gains, but they are also the weakest part of the thermal isulating building envelope.
The influences of various U-value (Ug) and g-value of glazing on the energy performance of selected passive house were calculated by the use of computer simulation.

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29.11.2020
Ing.arch. Zdeněk Rudovský, Ph.D., Rektorát ČVUT v Praze, odbor výstavby a investiční činnosti

The benefits of BIM are discussed at almost all the conferences concerning the construction industry. Better quality project documentation is one of the most often referred assets of projects modelled in BIM. Unfortunately, it is not clear whether this benefit was realised in the projects or not. So, there raise following questions:

  • How exactly was the declared better quality measured?
  • What exactly is meant by the better quality documentation in practise?
  • How can a contracting authority assess the quality of the project data processed by BIM models?

This article will try to answer all these questions and introduce the reader into the elementary principles of the quality measurability of the project information.

27.11.2020
Ing.arch. Zdeněk Rudovský, Ph.D., Mgr. Marek Stowasser

The article is intended for all clients (contracting authorities) who would like to choose a quality BIM contractor for their future project. It is based on the experience of implemented tenders (small-scale public contracts) and procurement procedures pursuant to Act No. 134/2016 Coll. on Public Procurement, as amended (“PP”). The article is an introduction to the system of qualitatively oriented selection of the BIM model contractor and related outputs – i.e. 2D drawing, quantity take-off, etc. This article applies to the Czech law.


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