Research of the Existing Post-tensioned Roof Trusses and their Reliability

• Autorzy: Mynarcik Petr , Bures Vladislav , Johanides Marek , Dobes Pavel , Mikolasek David , Vacek Miroslav , Patrman Martin

Identyfikatory

DOI

10.29227/IM-2024-02-31

Warianty tytułu

PL

Badanie istniejących dźwigarów dachowych sprężanych oraz ich niezawodności

• Konferencja: 9th World Multidisciplinary Congress on Civil Engineering, Architecture, and Urban Planning - WMCCAU 2024 : 2-6.09.2024
• Języki publikacji: EN

Abstrakty

EN

The issue of insufficient reliability and, in some cases, the failure of post-tensioned bridge structures, footbridges, and roof trusses, particularly in industrial halls, is one of the current and serious problems of the construction industry in the Czech Republic. The most well-known failures of these structures include the collapse of the Morandi Bridge near Genoa, Italy, in August 2018, and the collapse of the Troja footbridge in Prague in December 2017. Less known are the failures of posttensioned truss roof structures that occurred in the Czech Republic and Slovakia. Especially in the Czech Republic, there were failures in Tachov (2010 and 2018), Sluknov (December 2023), and Karlovy Vary (March 2024). A common feature of all these failures was the corrosion of the prestressing reinforcement in inadequately grouted cable ducts. Roof structures of this type have been used in more than 100 buildings that are still in operation in the Czech Republic. In response to this situation, the company Rada Building s.r.o., in cooperation with academic institutions, developed a method to reinforce trusses threatened by corrosion using an external steel structure. The company carries out the reinforcement work during normal operation in the hall below the trusses. Research on post-tensioned truss structures and the possibilities of their static securing is being conducted in cooperation with the Faculty of Civil Engineering at VSB – Technical University of Ostrava, the Faculty of Art and Architecture at the Technical University of Liberec, and the company Rada Building, s.r.o. The ambition of the research is to analyze the condition of as many trusses as possible embedded in buildings in the Czech Republic and Slovakia using building structure diagnostic methods and to evaluate these surveys. Furthermore, the research aims to verify the actual behavior of such structures through tests on real trusses taken from demolished buildings. VSB – TU Ostrava has several trusses available, and load tests are currently being carried out on them. An important and final part of the research is to find the optimal diagnostic method that would improve the ability to predict the risk of roof failures in operational buildings and to optimize the methods for securing these structures to ensure full static reliability with the lowest possible costs and minimal impact on the building

Słowa kluczowe

EN

post-tensioned structures; corrosion of the tendons; diagnostics; evaluation

PL

konstrukcje sprężone; korozja ścięgien; diagnostyka; ocena

• Wydawca: Polskie Towarzystwo Przeróbki Kopalin
• Czasopismo: Inżynieria Mineralna
• Rocznik: 2024
• Tom: Vol. 1, no. 2
• Strony: art. no. 31
• Opis fizyczny: Bibliogr. 5 poz., rys., tab., zdj.

Twórcy

autor

Mynarcik Petr

• Faculty of Civil Engineering, VSB Technical university of Ostrava, Ludvika Podeste 1875/17, Ostrava – Poruba, Czech Republic

• https://orcid.org/0000-0002-9758-342X

autor

Bures Vladislav

• Faculty of Art and Architecture, Technical University of Liberec, Studentska 1402/2, Liberec, Czech Republic

autor

Johanides Marek

• Faculty of Civil Engineering, VSB Technical university of Ostrava, Ludvika Podeste 1875/17, Ostrava – Poruba, Czech Republic

• https://orcid.org/0000-0003-4295-4761

autor

Dobes Pavel

• Faculty of Civil Engineering, VSB Technical university of Ostrava, Ludvika Podeste 1875/17, Ostrava – Poruba, Czech Republic

• https://orcid.org/0000-0003-1005-3715

autor

Mikolasek David

• Faculty of Civil Engineering, VSB Technical university of Ostrava, Ludvika Podeste 1875/17, Ostrava – Poruba, Czech Republic

• https://orcid.org/0000-0002-9197-856X

autor

Vacek Miroslav

• Faculty of Civil Engineering, VSB Technical university of Ostrava, Ludvika Podeste 1875/17, Ostrava – Poruba, Czech Republic

• https://orcid.org/0000-0003-2175-8913

autor

Patrman Martin

• Faculty of Art and Architecture, Technical University of Liberec, Studentska 1402/2, Liberec, Czech Republic

Bibliografia

• 1. P. Mynarčík, “Dodatečně předpjaté konstrukce střešních vazníků / Post-tensioned structures of Roof Trusses“ in Stavebnictví 03/2021, pp 20-24
• 2. V. Bureš, P. Pospíšil, “Hodnocení dodatečně předpjatých vazníků střech průmyslových hal / Evaluation of Posttensioned Roof Trusses of the Industrial Halls“, in Realizace staveb 01/2024
• 3. J. Kolísko, V. Vacek, P. Pokorný, M. Kostelecká, “Vlastnosti předpínací výztuže ovlivněné korozí / Properties of Prestressed Reinforcement Structures under Corrosion“, in Beton TKS 6/2019, pp. 3-9
• 4. A. Farhidzadech, A. Ebrahimkhanlou, S. Salamone, “Corrosion Damage Estimation in Multi-wire Steel Strands Using Guided Ultrasonic Waves. Proceedings of SPIE” – The international Society for Optical Engineering, 2015
• 5. CSN 73 6221 Prohlídky mostů pozemních komunikací / CSN 73 2621 – Inspection of Road Bridges

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki i promocja sportu (2025).