Dynamische Berechnung von Eisenbahnbrücken im Zuge von Hochgeschwindigkeitsstrecken – Ein alternatives Verfahren zur Simulation von Zugüberfahrten

Pircher, Heinz; Stadler, Christian; Glatzl, Johann; Seitz, Peter

doi:10.1002/bate.200910001

Cited by 5 publications

(4 citation statements)

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“…The parametric dynamic analyses were performed using linear modal analysis techniques. Thereby, the system of differential equations is de-coupled into a series of ordinary differential equations, each representing the response of a "modal" single degree of freedom (SDOF) mass-spring system [2]. Linear structural behavior and linear viscous damping are assumed for this type of analysis.…”

Section: Analytical Methods For Dynamic Analysismentioning

confidence: 99%

“…Linear structural behavior and linear viscous damping are assumed for this type of analysis. By solving the individual ordinary differential equations for the SDOF systems analytically for the passage of a single axle, and using the superposition principle to determine the cumulative effect of multiple axles, great computational efficiency can be achieved; an application of this method to bridges in the Austrian federal railway system was described in [2]. In a recent graduate thesis [3], this method was prepared for use in systematic parametric studies.…”

Section: Analytical Methods For Dynamic Analysismentioning

confidence: 99%

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06.01: Critical bridges in high‐speed railway lines: Systematic identification for specific trains

2017

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For the design of railway bridges in railway lines with a speed limit above 200 km/h the dynamic effects have to be considered. The present design codes such as Eurocode (EN 1991-2) achieve this by assuming different high-speed load models (for example HSLM-A) for the dynamic calculations of all railway bridges in the network. If train manufacturers design a new high-speed train which fulfills the limits of the load model HSLM-A (geometric and weight parameters), then no additional verification of the dynamic effects are required as all the railway bridges already comply with the HSLM-A. New challenges arise if a train manufacturer decides to differ from these limits, as they may be uneconomic (for example short length of single car). Furthermore, a railway operator may wish to expand the use of high-speed trains on traditional lines, which were, up to now, not verified for dynamic loads. In both cases, each single railway bridge in the railway network has to be recalculated by considering the geometry and weight parameters of the new developed train, which seems to be a cumbersome task. Therefore this paper deals at first with the different train parameters and their limits, which need to be fulfilled in order to be in line with the load model HSLM-A and shows which of them are more critical than the others. This is done by assuming 8 different fictitious trains which fulfill or slightly exceed these limits. The different structural hazard is determined by performing systematic dynamic analyses for a large parameter range of single-span bridges and train speeds. The second part of this paper deals with a methodology, which makes it possible to determine the critical bridges in high-speed railway lines (critical length and critical first natural frequency) for a given train load model in order to reduce the total number of bridges to be investigated. In addition, the train signature curve is analysed with respect to support the dynamic analysis.

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Section: Analytical Methods For Dynamic Analysismentioning

confidence: 99%

Section: Analytical Methods For Dynamic Analysismentioning

confidence: 99%

06.01: Critical bridges in high‐speed railway lines: Systematic identification for specific trains

2017

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“…Alternativ dazu werden auch die wesentlich effizienteren kombiniert numerischen und analytischen Lösungsverfahren, wie z. B. das von Pircher vorgestellte Verfahren der analytischen Zeitschrittintegra tion, angewendet [6]. Zur Berechnung der Tragwerksantwort bei Zugüberfahrt werden als sehr gute Nä he rungs verfahren im Fall von beidseitig gelenkig gelagerten Brücken und Modellierung als Balken auch die im ERRI D 214/RP 6 [7] angegebenen DER-und LIR-Methoden angewendet.…”

Section: Dynamische Analyse Der Zugüberfahrt Bei Eisenbahnbrücken Unter Berücksichtigung Von Nichtlinearen Effekten 1 Allgemeinesunclassified

Dynamische Analyse der Zugüberfahrt bei Eisenbahnbrücken unter Berücksichtigung von nichtlinearen Effekten

Reiterer

Firus²

2021

Beton und Stahlbetonbau

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Im Artikel wird das Schwingungsantwortverhalten von Eisenbahnbrücken infolge Zugüberfahrt unter Berücksichtigung von nichtlinearen Effekten untersucht und bewertet. Die betrachteten Nichtlinearitäten beziehen sich auf die bei realen Eisenbahnbrücken festgestellte Amplitudenabhängigkeit der Eigenfrequenzen. Im ersten Teil werden die bei durchgeführten dynamischen Messungen an realen Eisenbahnbrücken detektierten Nichtlinearitäten dargestellt und diskutiert. Der Fokus liegt dabei auf einfeldrigen Stahlbetonplattentragwerken mit Schotteroberbau. Die Grundlagen des nichtlinearen Duffing‐Schwingers mit unterlinearer Federkennlinie werden dargelegt und die besonderen Effekte von nichtlinearen Schwingungen werden erläutert. Im zweiten Teil werden numerische Simulationen der Zugüberfahrten unter Betrachtung von nichtlinearen Balkenmodellen durchgeführt. Bei den Simulationsberechnungen wird die Amplitudenabhängigkeit der Eigenfrequenzen berücksichtigt und die Tragwerksantworten bei Zugüberfahrt in der Form von Resonanzkurven dargestellt. Zu Vergleichszwecken werden die Berechnungen auch an linearen Balkenmodellen mit konstanten Eigenfrequenzen durchgeführt und die sich ergebenden Abweichungen diskutiert. Der Einfluss der untersuchten Nichtlinearitäten auf das Schwingungsverhalten von Eisenbahnbrücken wird herausgearbeitet und Empfehlungen für die zukünftige Berücksichtigung dieser Effekte bei dynamischen Berechnungen der Zugüberfahrt werden angegeben.

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“…The dynamic calculation of the structural responses resulting from train crossing simulations is usually carried out with finite element programs, whereby the equations of motion are solved by application of modal or direct time-step integration. Alternatively, the much more efficient combined numerical and analytical solution methods, such as the analytical time-step integration method presented by Pircher [6] or the DER-and LIRmethod presented in ERRI D214/RP 6 [7] are also used.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Railway Bridges Considering the Nonlinear Amplitude-Dependent System Behaviour - Simulation and in-Situ Tests

Reiterer,

Firus

2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The train-induced forced vibration responses of railway bridges are investigated and evaluated under consideration of nonlinear effects. The considered nonlinearities refer to the amplitude dependency of the natural frequencies, which was observed during in-situ measurements conducted by the authors for several existing railway bridges of different construction type. The nonlinearities detected during dynamic measurements on existing railway bridges are presented and discussed. The focus is on single-span steel and concrete slab bridges with ballasted superstructure. Numerical simulations of train crossings are carried out under assumption of nonlinear beam models for the considered railway bridges. The amplitude dependency of the natural frequencies is considered in these nonlinear simulations and the structural responses during train crossing are presented in the form of resonance curves. For comparison purposes, the calculations are also carried out on linear beam models with constant natural frequencies and the resulting deviations are discussed. The influence of the investigated nonlinearities on the vibration response behavior of railway bridges is highlighted and recommendations for the future consideration of these effects in dynamic calculations of train crossing are given.

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Dynamische Berechnung von Eisenbahnbrücken im Zuge von Hochgeschwindigkeitsstrecken – Ein alternatives Verfahren zur Simulation von Zugüberfahrten

Cited by 5 publications

References 0 publications

06.01: Critical bridges in high‐speed railway lines: Systematic identification for specific trains

06.01: Critical bridges in high‐speed railway lines: Systematic identification for specific trains

Dynamische Analyse der Zugüberfahrt bei Eisenbahnbrücken unter Berücksichtigung von nichtlinearen Effekten

Dynamic Analysis of Railway Bridges Considering the Nonlinear Amplitude-Dependent System Behaviour - Simulation and in-Situ Tests

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