Evaluation of seismic shear capacity of prestressed concrete containment vessels with fiber reinforcement

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.

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Shear strength of reinforced concrete beams with a fiber concrete matrix

Canadian Journal of Civil Engineering ◽

10.1139/l05-118 ◽

2006 ◽

Vol 33 (6) ◽

pp. 726-734 ◽

Cited By ~ 32

Author(s):

Fariborz Majdzadeh ◽

Sayed Mohamad Soleimani ◽

Nemkumar Banthia

Keyword(s):

Shear Strength ◽

Reinforced Concrete ◽

Fiber Volume Fraction ◽

Volume Fraction ◽

Fiber Reinforcement ◽

Shear Capacity ◽

Fiber Reinforced Concrete ◽

Rc Beams ◽

Fiber Reinforced ◽

Fiber Volume

The purpose of this study was to investigate the influence of fiber reinforcement on the shear capacity of reinforced concrete (RC) beams. Both steel and synthetic fibers at variable volume fractions were investigated. Two series of tests were performed: structural tests, where RC beams were tested to failure under an applied four-point load; and materials tests, where companion fiber-reinforced concrete (FRC) prisms were tested under direct shear to obtain material properties such as shear strength and shear toughness. FRC test results indicated an almost linear increase in the shear strength of concrete with an increase in the fiber volume fraction. Fiber reinforcement enhanced the shear load capacity and shear deformation capacity of RC beams, but 1% fiber volume fraction was seen as optimal; no benefits were noted when the fiber volume fraction was increased beyond 1%. Finally, an equation is proposed to predict the shear capacity of RC beams.Key words: shear strength, fiber-reinforced concrete, RC beam, stirrups, energy absorption capacity, steel fiber, synthetic fiber.

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Effect of Prestress on Shear Capacity of Prestressed Concrete Beams.

Doboku Gakkai Ronbunshu ◽

10.2208/jscej.2001.669_149 ◽

2001 ◽

pp. 149-159

Author(s):

Yasuhiro MIKATA ◽

Susumu INOUE ◽

Kazuo KOBAYASHI ◽

Tamotsu NIEDA

Keyword(s):

Prestressed Concrete ◽

Concrete Beams ◽

Shear Capacity

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Evaluation of shear capacity of prestressed concrete beams using the Softened Membrane Model for Prestressed Concrete (SMM-PC)

Advances in Engineering Materials, Structures and Systems: Innovations, Mechanics and Applications ◽

10.1201/9780429426506-236 ◽

2019 ◽

pp. 1366-1371

Author(s):

Yogeendra R Holebagilu ◽

Vijay Kumar Polimeru ◽

Arghadeep Laskar

Keyword(s):

Prestressed Concrete ◽

Concrete Beams ◽

Shear Capacity ◽

Membrane Model

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SHEAR PERFORMANCE OF SPECIAL DRY JOINTS FOR PRECAST CONCRETE SEGMENTS

ASEAN Engineering Journal ◽

10.11113/aej.v11.16667 ◽

2021 ◽

Vol 11 (1) ◽

pp. 60-72

Author(s):

Watanachai Smittakorn ◽

Tosporn Prasertsri ◽

Worapon Pattharakorn ◽

Pitcha Jongvivatsakul

Keyword(s):

Prestressed Concrete ◽

Precast Concrete ◽

High Strength ◽

Shear Capacity ◽

Fiber Volume ◽

Strength Concrete ◽

Test Parameters ◽

Ductile Shearing ◽

Shear Performance ◽

Normal Strength

The special dry joints for precast prestressed concrete segments are invented in this study toovercome the limitation of conventional dry joints. Eight specimens of special dry joints were madeand subjected to direct shear test. Test parameters comprise concrete compressive strength (normaland high strength concrete) and steel fiber volume added in the special dry joint (0%, 0.5%, and1.0%). Test results revealed that the inclusion of steel fibers remarkably enhanced the shear capacityand ductility index. Failure mode of specimens was changed from shearing off to concrete crackingaround shear key corners, defined as ductile shearing-off failure. Furthermore, the existing equationsfor predicting shear capacity of keyed joints were validated by the experimental results. Amongavailable equations from literatures, the Turmo’s equation yields better prediction of the shearcapacity for the special dry joint made with normal strength concrete.

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Residual Prestress Forces and Shear Capacity of Salvaged Prestressed Concrete Bridge Girders

Journal of Bridge Engineering ◽

10.1061/(asce)be.1943-5592.0000212 ◽

2012 ◽

Vol 17 (2) ◽

pp. 302-309 ◽

Cited By ~ 8

Author(s):

G. Parry Osborn ◽

Paul J. Barr ◽

David A. Petty ◽

Marvin W. Halling ◽

Travis R. Brackus

Keyword(s):

Prestressed Concrete ◽

Shear Capacity ◽

Bridge Girders ◽

Concrete Bridge ◽

Prestressed Concrete Bridge

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An Experiment on Seismic Shear Capacity for HRB500 Grade R/C Frame Columns within Yield Hinge Regions

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.105-107.948 ◽

2011 ◽

Vol 105-107 ◽

pp. 948-952

Author(s):

Pin Wu Guan ◽

Meng Chen

Keyword(s):

Experimental Study ◽

Reinforced Concrete ◽

Structural Design ◽

Failure Modes ◽

Seismic Loading ◽

Concrete Columns ◽

Shear Capacity ◽

Reinforced Concrete Columns ◽

Seismic Shear

An experiment on shear capacity for HRB500 grade R/C frame columns within yield hinge regions is studied. The different failure modes for specimens within yield hinge regions are classified, and the hysteretic curves are studied. The shear contributions of stirrups and concrete for columns are analyzed in detail. Based on the experimental study, formulas for the shear capacity of reinforced concrete columns are supposed under seismic loading, and the different formulas are adopted to estimate the shear capacity for columns at different seismic levels, Both security and economy of structural design are all considered.

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