Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Koncepcja kładki Berdychowskiej przez Wartę w Poznaniu

100%

Biliszczuk J. , Onysyk J. , Teichgraeber M. , Luniak A. , Ways J.

2019

tom R. 75, nr 6

279--281

Kładka łączy centrum Poznania z Ostrowem Tumskim i kampusem Politechniki Poznańskiej. Składa się z dwóch części: obiektu nad Wartą i obiektu nad Cybinią (kanał Warty). Szczegółowo opisano część o stalowej konstrukcji łukowej, położonej nad rzeką Wartą, mającą rozpiętości 28,50 + 17,00 + 60,00 + 40,00 + 6,50 m oraz łuki wysokości 23,00 i 19,00 m. Przedstawiono walory ukształtowania i usytuowania kładki.

The presented footbridge connects the centre of Poznań with Ostrów Tumski Island and the campus of the Poznań University of Technology. The bridge consists of two parts: an object on the Warta River and an object over Cybinia (the Warta Canal). The paper will describe in detail the part located on the Warta River, which has an arched structure. It is a steel structure with the following spans span 28.50 + 17.00 + 60.00 + 40.00 + 6.50 m. The elevation of arches is equal to 23.00 and 19.00 m. The paper will present the construction of the object and its architectural values.

Dynamic performance verifcation of the Rędziński Bridge using portable camera‑based vibration monitoring systems

72%

Bocian M. , Nikitas N. , Kalybek M. , Kużawa M. , Hawryszków P. , Bień J. , Onysyk J. , Biliszczuk J.

tom Vol. 23, no. 1

art. no. e40, 2023

The assessment of dynamic performance of large-scale bridges typically relies on the deployment of wired instrumentation systems requiring direct contact with the tested structures. This can obstruct their operation and create unnecessary risks to the involved personnel and equipment. These problems can be readily avoided by using non-contact instrumentation systems. However, the cost of of-the-shelf commercial products often prevents their wide adoption in engineering practice. To this end, the dynamic performance of the biggest one-pylon cable-stayed bridge in Poland is investigated based on data from a consumer-grade digital camera and open access image-processing algorithms. The quality of these data is benchmarked against data obtained from conventional wired accelerometers and a high-end commercial optical motion capture system. Operational modal analysis is conducted to extract modal damping, which has a potential to serve as an indicator of structural health. The dynamic properties of the bridge are evaluated against the results obtained during a proof loading exercise undertaken prior to the bridge opening. It is shown that a vibration monitoring system based on consumer-grade digital camera can indeed provide an economically viable alternative to monitoring the complex time-evolving dynamic behaviour patterns of large-scale bridges.