Druckschachtpanzerungen mit mehreren Schubringen - Realitätsnahe Schubringkräfte aus Zwangsbeanspruchungen und Vergleich mit Bemessungsmodell

Translated title of the contribution: Penstocks with multiple thrust rings – accurate forces at thrust rings due to constraining effects and comparison with a simple design model

Harald Unterweger*, Alexander Ecker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Penstocks with multiple thrust rings – accurate forces at thrust rings due to constraining effects and comparison with a simple design model. Thrust rings are a component of penstocks and have to transfer the longitudinal forces of the steel pipe to the surrounding rock mass. Longitudinal forces occur primarily due the pressure loads at valves or at pipe covers. Within this paper, the realistic load bearing behaviour of different penstocks geometries with multiple thrust rings is presented, including constraining effects due to internal pressure and temperature. Results are shown with and without friction effects between steel pipe and surrounding concrete and are based on numerical FE analyses. In addition, a simple 1D beam model (design model), developed by the authors, is presented. The forces at the thrust rings are compared between both models. It is shown that also for different load combinations the simple 1D beam model gives accurate results for practical application. The FE study also shows, that always the load combinations with the constraining effects due to internal pressure and temperature must be analysed – a superposition of the results of the individual load cases leads to misleading results.

Translated title of the contributionPenstocks with multiple thrust rings – accurate forces at thrust rings due to constraining effects and comparison with a simple design model
Original languageGerman
Pages (from-to)738-755
Number of pages18
JournalStahlbau
Volume91
Issue number11
DOIs
Publication statusPublished - Nov 2022

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Building and Construction
  • Civil and Structural Engineering

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