2019
DOI: 10.37544/0005-6650-2019-01-55
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Experimentelle Untersuchungen an vorgespannten Durchlaufträger-Teilsystemen zum Einfluss nicht mehr zugelassener Bügelformen auf die Querkrafttragfähigkeit/Experimental investigations on prestressed continuous beam subsystems to determine the influence of no longer permitted stirrup types on the shear capacity

Abstract: Zusammenfassung Aufgrund von gestiegenen Anforderungen an Bestandsbrücken, insbesondere infolge einer stetigen Zunahme der Verkehrsbeanspruchung sowie diversen Anpassungen im Nachweiskonzept, zeigen sich bei der Nachrechnung von Spannbetonbrücken häufig ausgeprägte rechnerische Defizite bezüglich der Querkrafttragfähigkeit. In der Praxis sind jedoch oftmals keine entsprechenden Schadensbilder am Bauwerk sichtbar. Diese Diskrepanz ist aktuell Gegenstand mehrerer Forschungsvorhaben. In diesem Zusammenhang stellt… Show more

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Cited by 6 publications
(6 citation statements)
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“…Investigations on continuous beams with shear reinforcement 19–24 also confirm the increase in shear resistance with decreasing shear slenderness. However, this effect is decreasing to zero with increasing shear reinforcement ratio.…”
Section: Theoretical Backgroundmentioning
confidence: 79%
See 1 more Smart Citation
“…Investigations on continuous beams with shear reinforcement 19–24 also confirm the increase in shear resistance with decreasing shear slenderness. However, this effect is decreasing to zero with increasing shear reinforcement ratio.…”
Section: Theoretical Backgroundmentioning
confidence: 79%
“…The results of recent investigations on slab stripes without shear reinforcement 2,18 confirm these relationships (Figure 2b). Investigations on continuous beams with shear reinforcement [19][20][21][22][23][24] also confirm the increase in shear resistance with decreasing shear slenderness. However, this effect is decreasing to zero with increasing shear reinforcement ratio.…”
Section: Shear Slendernessmentioning
confidence: 90%
“…This procedure cannot be adopted for the present experimental investigations analogous to previous, realistically scaled and adjusted test series. 2,43,46 • Except for the crack process zone and the immediate crack tip, no load-bearing component from aggregate interlock can be justified on the basis of DIC analysis for the considered constellation of prestressed beam elements with a low-shear reinforcement ratio. An evaluation of the crack friction with empirical models was not carried out, because such models cannot mimic the boundary conditions of a crack formation process in the structural member in an adequate way.…”
Section: Discussionmentioning
confidence: 99%
“…However, aggregate interlock components are widely used in shear model formulations, especially for members without shear reinforcement. This procedure cannot be adopted for the present experimental investigations analogous to previous, realistically scaled and adjusted test series 2,43,46 Except for the crack process zone and the immediate crack tip, no load‐bearing component from aggregate interlock can be justified on the basis of DIC analysis for the considered constellation of prestressed beam elements with a low‐shear reinforcement ratio.…”
Section: Discussionmentioning
confidence: 99%
“…Die Versuchsergebnisse zeigen, dass die Querkrafttragfähigkeiten von Kragbalken unter verteilten Lasten größer als diejenigen der Krag‐ oder Einfeldbalken unter Einzellasten sind. Maurer et al [16], Hegger und Herbrand [17], Huber et al [18] testeten vorgespannte Durchlaufbalken, teilweise ohne Querkraftbewehrung. Die Versuchsergebnisse zeigten ebenfalls, dass die Querkrafttragfähigkeit wesentlich höher ist als die Tragfähigkeit nach EC2.…”
Section: Verallgemeinerung Unterschiedlicher Statischer Systeme Und B...unclassified