Punching shear resistance of UHPFRC

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBN

Abstract

Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) is a high performance cementitious material with enhanced strength in tension and compression and significantly high energy absorption in the post crack region. Its mix composition is not much dissimilar from that of normal strength concrete. The main difference is that only fine aggregates are used in order to enhance the homogeneity of the mix, while microsilica is used to improve the density of the mix thereby reducing voids and defects. A high percentage of steel fibres is used to increase the tensile strength and at the same time to provide ductility. UHPFRC has been recently introduced in applications such as bridge decks, thin slabs and for the strengthening of existing elements. Even if there are various published studies on the compressive, tensile and flexural characteristics of UHPFRC, the punching shear performance of UHPFRC without additional steel bars has not been sufficiently studied. In this paper an extensive experimental work has been conducted on UHPFRC tiles with various thicknesses and various percentages of steel fibres and tests have been conducted under a concentrated load. Using the experimental results, the punching shear characteristics of the various UHPFRC mixes have been evaluated and shear resistance values have been proposed.

Original languageEnglish
Title of host publication20th Congress of IABSE, New York City 2019
Subtitle of host publicationThe Evolving Metropolis - Report
Place of PublicationZurich
PublisherIABSE (International Association for Bridge and Structural Engineering)
Pages867-872
Number of pages6
Volume114
ISBN (Electronic)9783857481659
Publication statusPublished - 2019

Publication series

Name20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report

Fingerprint

Punching
Reinforced concrete
Fibers
Steel fibers
Silica fume
Bridge decks
Concrete mixtures
Energy absorption
Tile
Ductility
Compaction
Tensile strength
Concretes
Cracks
Defects
Steel
Chemical analysis

Keywords

  • UHPFRC
  • slabs
  • punching shear
  • Punching shear
  • Slabs

Cite this

Lampropoulos, A., Duncan, J., & Tsioulou, O. (2019). Punching shear resistance of UHPFRC. In 20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report (Vol. 114, pp. 867-872). (20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report). Zurich: IABSE (International Association for Bridge and Structural Engineering).
Lampropoulos, Andreas ; Duncan, James ; Tsioulou, Ourania. / Punching shear resistance of UHPFRC. 20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report. Vol. 114 Zurich : IABSE (International Association for Bridge and Structural Engineering), 2019. pp. 867-872 (20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report).
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Lampropoulos, A, Duncan, J & Tsioulou, O 2019, Punching shear resistance of UHPFRC. in 20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report. vol. 114, 20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report, IABSE (International Association for Bridge and Structural Engineering), Zurich, pp. 867-872.

Punching shear resistance of UHPFRC. / Lampropoulos, Andreas; Duncan, James; Tsioulou, Ourania.

20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report. Vol. 114 Zurich : IABSE (International Association for Bridge and Structural Engineering), 2019. p. 867-872 (20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report).

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBN

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AB - Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) is a high performance cementitious material with enhanced strength in tension and compression and significantly high energy absorption in the post crack region. Its mix composition is not much dissimilar from that of normal strength concrete. The main difference is that only fine aggregates are used in order to enhance the homogeneity of the mix, while microsilica is used to improve the density of the mix thereby reducing voids and defects. A high percentage of steel fibres is used to increase the tensile strength and at the same time to provide ductility. UHPFRC has been recently introduced in applications such as bridge decks, thin slabs and for the strengthening of existing elements. Even if there are various published studies on the compressive, tensile and flexural characteristics of UHPFRC, the punching shear performance of UHPFRC without additional steel bars has not been sufficiently studied. In this paper an extensive experimental work has been conducted on UHPFRC tiles with various thicknesses and various percentages of steel fibres and tests have been conducted under a concentrated load. Using the experimental results, the punching shear characteristics of the various UHPFRC mixes have been evaluated and shear resistance values have been proposed.

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Lampropoulos A, Duncan J, Tsioulou O. Punching shear resistance of UHPFRC. In 20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report. Vol. 114. Zurich: IABSE (International Association for Bridge and Structural Engineering). 2019. p. 867-872. (20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report).