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Archiv článků od 6.7.2020 do 29.11.2021

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29.11.2021
Ing. Jakub Nosek, Ing. Petr Kalvoda, Ph.D., Ing. Michal Kuruc, Ph.D., VUT FAST Brno, Ústav geodézie

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., Stavebná fakulta STU v Bratislave, Katedra technických zariadení budov, Ing. Martin Šimko, PhD., Slovenská technická univerzita v Batislave

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.

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.

11.10.2021
Ing. Augustin Sadílek, VUT v Brně, Ústav soudního inženýrství, Ing. Vlastimil Vala, CSc., Ing. Filip Hakl, Ing. Eva Mačurová MBA, Státní pozemkový úřad v Praze, Oddělení tvorby cen a verifikace

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., Katedra geodézie, Stavebná fakulta, Slovenská technická univerzita

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.

21.6.2021
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.

16.5.2021
Ing. Michal Brandtner, Ing. Adam Boháček, VUT FAST Brno, Ústav technologie, mechanizace a řízení staveb

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.

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.

19.4.2021
prof. Ing. Ivan Vaníček, DrSc., Ing. Daniel Jirásko, Ph.D., ČVUT v Praze, Fakulta stavební, katedra geotechniky

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., Vysoké učení technické v Brně, Fakulta stavební, Ústav pozemního stavitelství

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., VUT FAST Brno, Ústav pozemního stavitelství, prof. Ing. Milan Ostrý, Ph.D., FAST VUT v Brně, Ústav pozemního stavitelství

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.

9.2.2021
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.

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., Rektorát ČVUT v Praze, odbor výstavby a investiční činnosti, Mgr. Marek Stowasser, KAROLAS Legal s.r.o., advokátní kancelář

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.

9.11.2020
Ing. Jan Vidim

Today, technical support is an essential part of services related to the sale of products, heating technologies, including other parts of the HVAC area. It has a pre-sale, sales and post-sale form. For those who need to use support, they are intended in the article of the said advice. At the same time, however, companies that introduce support can learn or inspire changes that have already been implemented.

30.9.2020
Ing. Katarína Korytárová, PhD., Prognostický ústav, Slovenská akadémia vied

The author points out the potential for savings in heating, etc. in public buildings and the potential dangers arising from inappropriately chosen scenarios. The risk factor is in particular the “lock-in effect”, which causes the failure to use all the possibilities to reduce the energy consumption that exists.

13.7.2020
Ing. Josef Hodboď, TZB-info, obor Vytápění

Investment and operating costs and the actual life of the internal water supply system are significantly reflected in the actual economy of the building and its operation. The mistakes that are associated with internal water mains impoverish us all unnecessarily, they only generate work for a small group. It is necessary to change the view of the importance of internal water supply, especially when it comes to buildings managed by the state, municipalities or serving the public.

6.7.2020
Ing. Josef Hodboď, TZB-info, obor Vytápění

Investment and operating costs and the actual life of the internal water supply system are significantly reflected in the actual economy of the building and its operation. The mistakes that are associated with internal water mains impoverish us all unnecessarily, they only generate work for a small group. It is necessary to change the view of the importance of internal water supply, especially when it comes to buildings managed by the state, municipalities or serving the public.


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