Archiv článků od 5.6.2017 do 11.12.2017

zadejte vlastní článek

zpět na aktuální články       1  2  3  4  5  6  7  8  9  10  ...   

Moderní metody pro měření osových sil v prvcích stavebních konstrukcí

Verification and in Situ Application of the Modern Method for Axial Tensile Force Measurement in Elements of Civil Engineering Structures

11.12.2017 | Ing. Tomáš Klier, Pontex Praha, odělení diagnostiky, prof. Ing. Michal Polák, CSc., ČVUT Praha, Fakulta stavební
In many practical cases it is important to know the actual value of tensile forces in prestressed elements of civil engineering structures. Main conclusions from experiments which were carried out within verification process and in situ application of the new method for an experimental estimation of the tensile force are described in the paper. The method is suitable for new structures and especially for existing ones.
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.
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.
Šetrné diagnostické metody pro hodnocení bezpečnosti dřevěných konstrukcí

Safety assessment of historic timber structures using testing of very small specimens

16.10.2017 | Ing. Michal Kloiber, prof. Ing. Miloš Drdácký, DrSc., dr. h., Ústav teoretické a aplikované mechaniky AV ČR, Centrum excelence Telč
The paper discusses approaches to safety assessment of historic timber structures using testing of very small specimens extracted from a historic structure or by direct in-situ testing. The presented methods must to take into account conditions given by the EN 16085. They further consider environmental influences and correlations of characteristics achieved by various SDTs.
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.
Nanomateriály a vybrané oblasti ich využitia

Nanomaterials and selected areas of their utilization

2.10.2017 | doc. Ing. Ivan Kubovský, PhD., Technická univerzita vo Zvolene, Drevárska fakulta, Katedra fyziky, elektrotechniky a aplikovanej mechaniky, Ing. Miroslav Gašparík, PhD., Česká zemědelská univerzita v Praze, Fakulta lesnická a dřevařská, Katedra základního zpracování dřeva, prof. RNDr. František Kačík, PhD., Technická univerzita vo Zvolene, Drevárska fakulta, Katedra chémie a chemických technológií
The possibilities of using nanomaterials are quite broad – from increasing the hydrophobicity and photostability of surfaces, through improving the mechanical properties of traditional materials, aiding in the diagnosis and therapy of certain diseases, repairing damaged parts of the tissue, and solving problems in decontamination of the environment. Intensive research also takes place in their applications to increase the resistance of wood to wood-boring fungi and wood-destroying insects. Nanomaterials, including nanocellulose, are perspective in the field of wood fire protection, which may be important in the evolving trend of wood building construction.
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.
Kompozitní výztuž do betonu

Concrete and reinforced concrete

18.9.2017 | Ing. Miroslav Procházka, Technický a zkušební ústav stavební Praha, s.p.
The composite materials for strengthening/reinforcement a concrete has become the new construction product set up for compulsory verification pursuant to Act No. 22/1997 Coll. (č. 22/1997 Sb.) as amended by Government Ordinance No. 163/2002 Coll. (č. 163/2002 Sb.) as amended by Government Decree No. 312/2005 Coll. and No. 215/2016 Coll (č. 312/2005 Sb. a č. 215/2016 Sb.) This reinforcement exists in several different types, and accordingly, it also has significantly different properties which must be strictly respected in its use.
Průkazné stanovení vyztužení železobetonové konstrukce a vhodné NDT metody

Proving Non-compliance with the Prescribed Position of Steel Reinforcement in Reinforced Concrete Structures

11.9.2017 | Ing. Ondřej Anton, Ph.D., Ing. Věra Heřmánková, Ph.D., VUT FAST Brno
Despite efforts to maintain quality during the construction of reinforced concrete structures, it is relatively common for improper reinforcement to be used contradicting the project, which can lead to serious structural defects. It is then up to non-destructive testing methods to prove these defects. The key is to choose the appropriate method and device for the task.

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).

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.).
Administrativní budova Tamedia v Curychu

Technical Normalisation and Multi-Storey Timber Buildings

19.6.2017 | doc. Ing. Petr Kuklík, CSc., Ing. Lukáš Velebil, ČVUT v Praze, UCEEB, Ing. arch. Bc. Anna Gregorová, ČVUT v Praze
At present, there is growing interest in the realization of multi-storey wooden buildings. In the case of multi-storey wooden buildings, their safety, stiffness and acoustics are of key importance. The submitted paper focuses on the issue of fire safety of multi-storey wooden buildings, which is currently the subject of major discussions.
tesařské spoje © martinfredy - Fotolia.com

Current Issue of Carpentry Joints Structural Designing

5.6.2017 | Ing. Martin Hataj, doc. Ing. Petr Kuklík, CSc., ČVUT v Praze, pracoviště UCEEB
A growing environmental awareness and desire for sustainable solutions and healthy living conditions, especially in Europe, lead to an increasing demand for timber structures. High speed, excellent cut quality and accuracy of CNC processing allows an effective produce of timber structures by traditional carpentry procedures. This article responds to current problem of load bearing capacity calculations of traditional carpentry joints. This way of structural joints has not sufficient support in current standards and therefore design relies on simple empirical relationships based on experience. This paper presents the experimental and calculation methods for investigation of static behaviour and load bearing capacity of carpentry joints.
zpět na aktuální články       1  2  3  4  5  6  7  8  9  10  ...   
 
 

Aktuální články na ESTAV.czNová generace vysavačů UltraOne: Vysoký výkon, snadné ovládání a nízká hlučnostVánoce ve znamení tepla, to jsou nízkoenergetické radiátory RADIK RCOhřev teplé vody: Velikost a výkon ohřívačů a zásobníků na ohřev teplé vodyStavebnictví příští rok vzroste o 3,5 procenta, odhadují stavaři