Archiv článků od 22.5.2017 do 18.12.2017

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Složitá rekonstrukce staršího bytového domu

Complicated Reconstruction of an Older Multi-family House

18.12.2017 | Ing. Jan Koláček, Ph.D., Ústav betonových a zděných konstrukcí, FAST VUT v Brně, doc. Ing. Zdeněk Bažant, CSc., Ústav betonových a zděných konstrukcí, FAST VUT v Brně,
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.
Možnosti aplikace a testování systému nerezových helikálních výztužích

Application and Testing Possibilities of a Stainless Steel Helical Reinforcement for the Concrete Structures Sanation

20.11.2017 | Ing. Ondřej Karel, VUT FAST Brno, Ing. Jiří Kubanek, Saron statika Brno, Ing. Iva Rozsypalová, doc. Ing. Pavel Schmid, Ph.D., VUT Brno, Ústav stavebního zkušebnictví
The article deals with application of stainless steel helical reinforcement to sanitation of concrete structures and its application suitability focused on possible ways of diagnostics. Examples of possible use of this reinforcement are summed up.
Analýza trvanlivosti preimyselných komínov © Imperium Obrazu - Fotolia.com

Analysis of the Durability of Industrial Chimneys

13.11.2017 | prof. Ing. Juraj Bilčík, PhD., Ing. Ivan Hollý, PhD., Ing. Natália Gažovičová, Stavebná fakulta STU Bratislava
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.

The Methods of the Geodetic Documentation Creation for the Objects Reconstruction

6.11.2017 | Ing. Ján Ježko, PhD., Katedra geodézie, Stavebná fakulta, STU v Bratislave
The article describes the methods of the surveying data and documentation production. The documentation is used for the process of planning, realisation and reconstruction of transport, energetic, industrial, ecologic and public objects. The documentation is also used in the remediation process and the protection of the buildings and historical objects. In these processes, it is necessary to know the spatial dimension – location data, the location of these objects on the Earth's surface and shape and dimensions of these objects. The activities that lead to the realisation, reconstruction and remediation of building objects require a quality maps, photogrammetric images and geodetic models (3D models), which are mostly realised in a suitable interactive graphic PC system in 3D digital form.
Opravy historických objektů z pozice statiky a z hlediska památkové péče

Repaits of Historic Buildings from the Position of Static Engineering and from the Point of View of Heritage Care

30.10.2017 | doc. ing. Ladislav Klusáček, CSc., doc. ing. Zdeněk Bažant, CSc., VUT FAST Brno
Heritage care specialists in the repair and reconstruction of historical buildings prefer using of previous working methods and especially materials, sometimes too strongly. It is not always easy to satisfy their requirements, with regard to the problematic of static object state. It is necessary to find suitable compromises.
Stavebně-technický průzkum brněnského kina Scala

Building Survey of Scala Cinema

16.10.2017 | doc. Ing. Pavel Schmid, Ph.D., Ing. Iva Rozsypalová, Ing. Ondřej Karel, Ing. Petr Daněk, Ph.D., Ing. Petr Žítt, VUT Brno, Ústav stavebního zkušebnictví
The paper deals with structural-technical survey of Scala cinema in Brno. It is a historic building completed in 1928. The main purpose of the diagnostic survey was passportisation of structure´s defects, determine the quality of concrete and reinforcement, assessment of defects and failures causes, evaluate the condition of the ceiling structure in relation to the considered reconstruction above cinema.
Rekonstrukce dřevěných trámových stropů

Reconstruction of wooden joist ceilings

9.10.2017 | Ing. Zdeněk Vejpustek, Ph.D., doc. Ing. Bohumil Straka, CSc.
The paper shows reasons for carrying out restoration of historic wooden ceiling using “dry method” – interaction between historic wooden beams and wood-based panels. This article summarizes the process of reconstruction of historic wooden ceilings, describes the problems to be addressed and it summarizes experience with completed ceilings in Brno,Czech Republic.
Otázky sanací betonových konstrukcí parkovacích a garážových objektů

Questions of Rehabilitation a Concrete Construction of Parking Buildings

2.10.2017 | Ing. Vítězslav Vacek, CSc., doc. ing. Jiří Kolísko, Ph.D., ČVUT Praha. Kloknerův ústav
The article deals with the possibilities of rehabilitation of concrete structures the technical and technological aspects in relation to the detected condition, execute, operate and its age.

New publication Ventilation of schools in context

11.9.2017 | doc. Ing. Vladimír Zmrhal, Ph.D., ČVUT v Praze, Fakulta strojní, Ústav techniky prostředí
At the beginning of the new school year, we would like to draw attention to the book Ventilation Schools in Contexts. All parents want their children to be successful at school. It also depends on class ventilation. We bring a selection from the chapters of the new publication.

Technology of Excavated Soil and its Liquefaction with the Addition of Fly Ash

4.9.2017 | Ing. Magdaléna Kociánová, Ing. Vít Černý , Ph.D., prof. ing. Rostislav Drochytka, CSc., MBA, VUT FAST Brno
The paper describes the technology of liquefaction and stabilization of soils that are created in the excavation works of engineering networks. Liquefied grout could be used to fill even the less accessible spaces of utility networks. For the re-use of the excavated soil in a liquefied form, is necessary its pre-treatment, which consists in stabilizing by the suitable stabilizing additive. The mixture is furthermore required the liquefaction by using a suitable liquefying additives. Suitable for stabilization and soil liquefaction it seems the use of fly ash, as is mentioned below in the paper.

Structure of framework (part 4)

28.8.2017 | Ing. Jan Vinař, MURUS, monumenta renovamus, s.r.o.
The paper deals with the principles of structure, function, use, disfunction and repairs of frame houses (part 1 to 4).

Structure of framework (part 3)

21.8.2017 | Ing. Jan Vinař, MURUS, monumenta renovamus, s.r.o.
The paper deals with the principles of structure, function, use, disfunction and repairs of framework (part 1. to 4.)
Hamr na Jezeře - Konstrukční principy hrázděných staveb

Structure of framework (part 2)

14.8.2017 | Ing. Jan Vinař, MURUS, monumenta renovamus, s.r.o.
The paper deals with the principles of structure, function, use, disfunction and repairs of framework (part 1 to 4).
© 100ker - Fotolia.com

Structure of framework (part 1)

7.8.2017 | Ing. Jan Vinař, MURUS, monumenta renovamus, s.r.o.
The paper deals with the principles of structure, function, use, disfunction and repairs of framework (part 1 to 5).
Hydroizolace z asfaltových pásů, ilustrační foto: Petr Bohuslávek, redakce

Verification of the possibility of joining asphalt insulation belt, the results of the strength of their connections

17.7.2017 | Ing. Jindřich Sobotka, Ph.D., VUT v Brně, Fakulta stavební, Ústav pozemního stavitelství
The mutual joint waterproofing aspfalt strips can in practice be done in different ways. But not everyone is the correct one. Also important is the width of the overlapping associated strips. We will deal with strongholds in the modified stress and oxidized asphalt strip and compare the strength of the joints. If the bitumen is used as additional waterproofing is necessary, select the types of bitumen sheets with matching suitable bearing insert. As a waterproofing type we should use the modified asphalt strip. The issue of reliability of waterproofing is associated with a high quality of work performed. This quality is affected not only the human factor, but also the technology used for implementation of waterproofing layers. Another influencing factor is the type of applied asphalt waterproofing strip.

Wooden Construction of the T18 Gyms

3.7.2017 | doc. Ing. Jaroslav Sandanus, PhD., doc. Ing. Kristián Sógel, PhD., Katedra kovových a drevených konštrukcií SvF STU v Bratislave
Between 1975 and 1985, many gyms of T18 type were built in Czechoslovakia. These gyms were mostly intended for schools, specifically primary schools. The manufacturer of these structures was Bučina Zvolen. The index T18 relates to the span of the load-bearing structure which amounts to 18 meters. The ground-plan measurements are 18,8 by 41,15 m.
The gyms were designed as low-cost structures, which also affected the length of their useful life – 20 to 25 years. In the present, many of these structures are still in use even though they are over 40 years old. Since there has been no refurbishment of these structures to this day, they fail to meet any normative criteria, especially concerning the thermal protection of the structure. Due to unsystematic maintenance, defects have in many cases occurred on the load-bearing members. These can result in limits to the structure’s usage and eventually to its complete shutdown. Under some conditions, it is possible to lengthen the useful life of the gym and it should be in the interests of its owners to be able to continue using it. Based on the diagnostics performed on the specific structure in Želiezovce (Slovakia) and the data collected from other gyms of this type, the authors of the presented contribution have elaborated the static calculation of the load-bearing timber structure for the case of enhancing the heat insulation properties to meet the European standards.

Dehumidfication of the Massonry by Microwave Radiation in the Practice

26.6.2017 | Ing. Kamil Binek, doc. Ing. Juraj Žilinský, PhD., Slovenská technická univerzita v Bratislave, Stavebná fakulta, Katedra konštrukcií pozemných stavieb
The cause of moisture in the masonry could by different. By old historical buildings is the problem in absence of hydro-insulation, which was made by flat stones or clay backfill. New buildings have a lot defect by application (for example: pipes penetration, join) or wrong design of hydro-insulation, which are the point infiltration of water in to the construction. This problems are made by wrong projection of hydro-insulation in the project. The project does not reflect all influences of the water. But they are also another cases, which can happened like river floods, flood by the neighbour. In those cases it is demanding to dry the building as soon as possible, to protect the property from the mold and return the function of the building. One of the method, which is suitable for this solution is microwave dehumidification, which realize all conditions in one. This aim include also the practice example of the microwave sanitation technique, used by dehumidification masonry, and the positive results.
Bytové domy v Praze © TZB-info

What are the common parts of residential buildings in the Czech Republic?

19.6.2017 | Ing. Petr Bohuslávek, redakce
The definition of what is a common part of a residential building is essential especially when modifying the building structures and eliminating defects that affect both a common part and residential units. How common parts are defined affects who finances the modifications and reconstructions of such structures and parts. The definition of common parts is based on the new Civil Code (No. 89/2012 Coll.) and on the already abolished Act on Ownership of Housing (No. 72/1994 Coll.).

Securing brick buildings against the influence of technical seismicity

29.5.2017 | doc. Ing. Jaroslav Solař, Ph.D., VŠB TU Ostrava
The contribution dealst with the problematics of statical defects, or more precisely with the formation of cracks in the brickwork caused by the effect of technical seismicity. It further deals with the construction principles which can be used when designing reconstruction of buildings which are located within the reach of the effect of technical seimicity. The problematics of historical buildings and conservation areas is also mentioned.

Thermal-technical evaluation of inner wall cavities within framework of a suggestion of wet masonry rehabilitation

22.5.2017 | doc. Ing. Jaroslav Solař, Ph.D., VŠB TU Ostrava
For excessive wet masonry rehabilitation, except for other methods, the method of air cavities is used. These can be wall or floor cavities. The wall cavities may be situated either on the internal or the external side of the wall. From the height point of view, internal side cavities can be located under the floor or above the floor level. This contribution only deals with the cavities above the floor level. In the projection practice, the air cavities usually are designed only empirically. But it is necessary to carry out their thermal-technical evaluation for their correct capacity. The matter of the evaluation is the topic of the following contribution.
2 comments, last 29.08.2017 08:03
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