Influence of loading conditions on the shear capacity of post-tensioned beams with low shear reinforcement ratios

2018 ◽  
Vol 170 ◽  
pp. 91-102 ◽  
Author(s):  
Patrick Huber ◽  
Tobias Huber ◽  
Johann Kollegger
Keyword(s):  
Shear Capacity ◽  
Loading Conditions ◽  
Shear Reinforcement ◽  
Low Shear ◽  
Post Tensioned

Influence of Spatial Variability on the Shear Capacity of RC Members without Shear Reinforcement

2013 ◽  
Vol 99 (7) ◽  
pp. 1679-1686
Author(s):  
Yuguang Yang ◽  
Joop Den Uijl ◽  
Joost Walraven ◽  
Stavros Petrocheilos
Keyword(s):  
Spatial Variability ◽  
Shear Capacity ◽  
Shear Reinforcement

Querkrafttragfähigkeit von Brückenträgern aus Spannbeton mit geringen Querkraftbewehrungsgraden/Shear Capacity of Prestressed Concrete Bridge Girders with Small Shear Reinforcement Ratios

Bauingenieur ◽  
2020 ◽  
Vol 95 (11) ◽  
pp. 397-407
Author(s):  
Viviane Adam ◽  
Martin Herbrand ◽  
Josef Hegger
Keyword(s):  
Prestressed Concrete ◽  
Shear Capacity ◽  
Bridge Girders ◽  
Concrete Bridge ◽  
Shear Reinforcement ◽  
Prestressed Concrete Bridge ◽  
Small Shear

Zusammenfassung Neben gestiegenen Verkehrslasten führen strengere normative Regeln zu höheren Anforderungen an Spannbetonbrücken. Viele ältere Spannbetonbrücken im Bestand weisen daher rechnerische Defizite bei der Querkrafttragfähigkeit auf. Durch experimentelle und theoretische Untersuchungen konnten im Zuge eines Forschungsprojekts für die Bundesanstalt für Straßenwesen (BASt) verfeinerte Berechnungsansätze für Querkraft erarbeitet werden. In diesem Beitrag werden am Institut für Massivbau der RWTH Aachen (IMB) durchgeführte Großversuche an Spannbetondurchlaufträgern vorgestellt. Die Träger mit Rechteck- oder I-Profil wiesen geringe Querkraftbewehrungsgrade auf und wurden durch Gleichstreckenlasten beansprucht. Auf Basis der Forschungsergebnisse wurde ein verfeinertes Bemessungsmodell entwickelt, das aus einem modifizierten Fachwerkmodell mit additivem Betontraganteil besteht und gegenüber dem Ansatz nach aktueller Nachrechnungsrichtlinie weitere Querkrafttragreserven berücksichtigt.

scholarly journals Post-tensioned girders with low amounts of shear reinforcement: Shear strength and influence of flanges

2013 ◽  
Vol 56 ◽  
pp. 357-371 ◽  
Author(s):  
Michael Rupf ◽  
Miguel Fernández Ruiz ◽  
Aurelio Muttoni
Keyword(s):  
Shear Strength ◽  
Shear Reinforcement ◽  
Post Tensioned

scholarly journals Shear Behavior of Steel-Fiber-Reinforced Recycled Aggregate Concrete Deep Beams

Buildings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 423
Author(s):  
Nancy Kachouh ◽  
Tamer El-Maaddawy ◽  
Hilal El-Hassan ◽  
Bilal El-Ariss
Keyword(s):  
Shear Behavior ◽  
Shear Capacity ◽  
Recycled Concrete ◽  
Recycled Aggregate Concrete ◽  
Steel Fibers ◽  
Recycled Aggregate ◽  
Shear Reinforcement ◽  
Deep Beams ◽  
Control Beam ◽  
Shear Response

Results of an experimental investigation aimed at studying the effect of steel fibers on the shear behavior of concrete deep beams made with a 100% recycled concrete aggregate (RCA) are presented in this paper. The study comprised testing of seven concrete deep beam specimens with a shear span-to-depth ratio (a/h) of 1.6. Two beams were made of natural aggregates (NAs) without steel fibers, two beams were made of a 100% RCA without steel fibers, and three beams were made of RCA-based concrete with steel fibers at volume fractions (vf) of 1, 2, and 3%. Two of the beams without steel fibers included a minimum shear reinforcement. Test results showed that the beam with a 100% RCA without steel fibers exhibited a lower post-cracking stiffness, reduced shear cracking load, and lower shear capacity than those of the NA-based control beam. The detrimental effect of the RCA on the shear response was less pronounced in the presence of the minimum shear reinforcement. The addition of steel fibers significantly improved the shear response of the RCA-based beams. The post-cracking stiffness of the RCA-based concrete beams with steel fibers coincided with that of a similar beam without fibers containing the minimum shear reinforcement. The use of steel fibers in RCA beams at vf of 1 and 2% restored 80 and 90% of the shear capacity, respectively, of a similar beam with the minimum shear reinforcement. The response of the RCA specimen with vf of 3% outperformed that of the NA-based control beam with the minimum shear reinforcement, indicating that steel fibers can be used in RCA deep beams as a substitution to the minimum shear reinforcement. The shear capacities obtained from the tests were compared with predictions of published analytical models.

Punching Shear in Post-Tensioned Flat Slabs with Shear Reinforcement: Codes and Tests

2016 ◽  
Vol 113 (2) ◽  
Author(s):  
Alessandra L. Carvalho ◽  
Guilherme S. Melo ◽  
Ronaldo B. Gomes
Keyword(s):  
Punching Shear ◽  
Shear Reinforcement ◽  
Flat Slabs ◽  
Post Tensioned

Web-shear capacity of prestressed hollow-core slab unit with consideration on the minimum shear reinforcement requirement

2014 ◽  
Vol 14 (3) ◽  
pp. 211-231 ◽  
Author(s):  
Deuck Hang Lee ◽  
Min-Kook Park ◽  
Jae-Yuel Oh ◽  
Kang Su Kim ◽  
Ju-Hyeuk Im ◽  
...  
Keyword(s):  
Shear Capacity ◽  
Hollow Core ◽  
Shear Reinforcement ◽  
Hollow Core Slab
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