Collapse Frequencies of Bridges

Proske, Dirk

doi:10.1007/978-3-319-73833-8_6

Cited by 5 publications

(1 citation statement)

References 47 publications

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“…The possibility of determining the discussed frequency on physical prototypes of the bridges with subsequent re-calculation as per real conditions is based on an experimentally established fact: most of the cross sections of elongated bodies are regardless of the scale of the overflowed structure [17][18][19][20][21]. In other words, the cross sections of elongated bodies overflowed by a flow of non-dimensional frequency of vortex shedding (Strouhal number) do not depend on the scale of the object:…”

Section: Methodsmentioning

confidence: 99%

Analysis of long-span bridge fluctuations for finding its optimal safe operation

Smirnova

2020

E3S Web Conf.

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The paper studies the intense oscillations sustained by the Volgogradsky Bridge on May 20, 2010. The studies were carried out based on physical and mathematical experiments. The introduction indicates the causes of emergence of the intense aeroelastic oscillations. Description is given of the physical nature of one of the types of these oscillations, i.e. stall flutter. Catastrophes are considered that had been caused by the flutter. Methodological fundamentals of the experiment are named and modern software capabilities of computer-aided fluid and gas dynamics are listed. The results of the experiment are supplied, including visualization of the Karman vortex street and determination of the Strouhal number. The recalculation of the experimental data to natural conditions is substantiated. A description is given of calculation of the bridge’s aeroelastic oscillations. The main results of the aerodynamic calculation are supplied: the Strouhal numbers and critical velocities. The results of mathematical and physical experiments tallied well. A tally of the calculation and estimated full-scale results is pointed out. Results of this calculation (bridge oscillation amplitudes) are supplied. The conclusions point to the prospective viability of the mathematical experiment method. The proposed methods can minimize risks for the construction of long-span girder bridges, ensuring the precise estimation of their subsequent safe operation.

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Section: Methodsmentioning

confidence: 99%

Analysis of long-span bridge fluctuations for finding its optimal safe operation

Smirnova

2020

E3S Web Conf.

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Die globale Gesundheitsbelastung durch Bauwerksversagen

Proske

2019

Bautechnik

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In diesem Beitrag wird die globale Gesundheitsbelastung durch Bauwerksversagen bestimmt. Dazu werden mittlere Verhältnisse von Bauwerken zu Einwohnern ermittelt und auf die Gesamtbevölkerung, unterteilt in Industrieländer und Entwicklungsländer, angewendet. Basierend auf bekannten Einsturzhäufigkeiten von Bauwerken werden daraus mittlere jährliche weltweite Einsturzhäufigkeiten von Bauwerken errechnet. Aus den mittleren Opferzahlen werden dann weltweite Opferzahlen geschätzt, wobei nicht nur Todesopfer, sondern auch Verletzte berücksichtigt werden. Diese Opferzahlen werden in „Verlorene Lebensjahre“ umgerechnet. Dieser Parameter wird häufig als Maß für ein Gesundheitsrisiko verwendet. Darüber hinaus wird auch noch der Gewinn an Lebensjahren abgeschätzt.

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Korrekturfaktoren der Einsturzwahrscheinlichkeit von Brücken

Proske

Hostettler²,

Friedl³

2019

Beton und Stahlbetonbau

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Correction of collapse probability of bridgesThe concept of minimizing life cycle costs uses, among other things, the parameter of probability of failure. In contrast to all other parameters, however, a connection with observed collapse frequencies is denied in the literature. In this paper, factors for the correction of the calculated failure probabilities are presented based on the evaluation of collapse statistics. These factors consider e.g. the building material, the type of static system or the type of bridge. This information is usually available in the databases of the infrastructure managers, so that the procedure can be easily integrated into existing databases and at the same time an individual realistic value can be determined for each bridge.

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Collapse Frequencies of Bridges

Cited by 5 publications

References 47 publications

Analysis of long-span bridge fluctuations for finding its optimal safe operation

Analysis of long-span bridge fluctuations for finding its optimal safe operation

Die globale Gesundheitsbelastung durch Bauwerksversagen

Korrekturfaktoren der Einsturzwahrscheinlichkeit von Brücken

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