Impact Performance of Low-Fiber Content HPFRCC: From Material to Structural Behavior

Conference paper
First Online:
Part of the RILEM Bookseries book series (RILEM, volume 15)

Abstract

It has been typically observed that concrete structures have a brittle failure mode by shear or punching under high-loading rates. The small capacity for energy absorption of plain concrete is responsible of such brittle failure development upon diagonal crack formation. High-performance fiber-reinforced cement composites (HPFRCCs) have superior performance than plain concrete in tension, not only by the higher tensile strength but especially regarding the energy absorption capacity associated to multiple cracking and crack-bridging ability. In order to understand the possible benefits of using HPFRCC under impact loading in structural applications, research must be done at both material and structural level. The present contribution deals with an experimental study on HPFRCC specimens subjected to impact. Reference quasi-static tests have been also carried out. The HPFRCC mix was reinforced with 1.6% volumetric amount of short straight high-strength steel fibers. The study at material level has focused on prismatic specimens subjected to pure bending, which allows to analyze the flexural strength and specific energy absorption capacity. Structural tests have consisted of beams reinforced with conventional longitudinal steel bars without stirrups, thereby assigning the resistance of the webs against shear to the contribution of the fibers. The results are presented in comparison with companion specimens of conventional plain concrete, which has allowed showing the higher strength, ductility and energy absorption capacity achieved with the utilization of the properties of the HPFRCC under both quasi-static and impact loading conditions.

Keywords

Impact HPFRCC Strain rate Reinforced concrete beams 
This is a preview of subscription content, log in to check access.

Notes

Acknowledgements

The financial support provided by the Spanish Ministry for Economy and Competitiveness (Projects ID BIA2012-30998 and BIA2016-74960-R AEI/FEDER, UE) is gratefully acknowledged. The steel fibers were kindly supplied by Bekaert.

References

  1. Bischoff, P.H., Perry, S.H.: Compressive behaviour of concrete at high strain rates. Mater. Struct. 24(6), 425–450 (1991)CrossRefGoogle Scholar
  2. Cadoni, E., Solomos, G., Albertini, C.: Concrete behaviour in direct tension tests at high strain rates. Mag. Concr. Res. 65(11), 660–672 (2013)CrossRefGoogle Scholar
  3. Kishi, K.H., Mikami, H., Matsuoka, K.G., Ando, T.: Impact behavior of shear-failure type RC beams without shear rebar. Int. J. Impact Eng. 27(2), 955–968 (2002)CrossRefGoogle Scholar
  4. Schellenberg, K.: On the design of rockfall protection galleries. Ph.D. Thesis, ETH Zurich, Switzerland (2008)Google Scholar
  5. Schuler, H., Mayrhofer, C., Thoma, K.: Spall experiments for the measurement of the tensile strength and fracture energy of concrete at high strain rates. Int. J. Impact Eng. 32, 1635–1650 (2006)CrossRefGoogle Scholar
  6. Soleimani, S.M., Banthia, N.: A novel drop weight impact setup for testing reinforced concrete beams. Exp. Tech. (2012). doi: 10.1111/j.1747-1567.2012.00810.x Google Scholar
  7. Ulzurrun, G., Zanuy, C.: Flexural response of SFRC under impact loading. Constr. Build. Mater. 134, 397–411 (2017)CrossRefGoogle Scholar
  8. Van Mier, J., Pruijssers, A.F., Reinhardt, H.W., Monnier, T.: Load-time response of colliding concrete bodies. J. Struct. Eng. 117(2), 354–374 (1991)CrossRefGoogle Scholar
  9. Zanuy, C., Ulzurrun, G., Yi, W.-J., Zhao, D.-B., Kunnath, S.K.: Discussion of ‘Simplified approach for assessing shear resistance of reinforced concrete beams under impact loads’. ACI Struct. J. 113(4), 789–791 (2017)Google Scholar

Copyright information

© RILEM 2018

Authors and Affiliations

  1. 1.Structural Engineering Group, Department of Continuum Mechanics and StructuresUniversidad Politécnica de MadridMadridSpain

Personalised recommendations