Title:
Steel-fibre reinforcement for large hydraulic concrete structures: Numerical investigations on a semi-spiral case
Author(s):
Mahdi Ben Ftima; Bruno Massicotte; Sébastien Mousseau
Publication:
Symposium Paper
Volume:
310
Issue:
Appears on pages(s):
279-288
Keywords:
Steel-fibre-reinforced concrete, ultra-high-performance fibre-reinforced concrete, size effect, hydraulic structure, thermal effects.
DOI:
Date:
3/17/2017
Abstract:
Large concrete hydraulic structures exhibit high temperature strains due to significant heat generation at early ages and to seasonal variations of water and air temperatures. When
subjected to restraint, these structures are prone to extensive cracking and leakage problems at service level. The size effect phenomena generally related to concrete softening has notable
influence in these large and lightly reinforced structures and contributes to strength reduction at ultimate level. The use of steel-fibre reinforcement is numerically investigated in this study, for the example of a semi-spiral case hydraulic structure. Two different sizes with a geometrical similitude are considered. Two alternative designs using steel-fibre-reinforced concrete (SFRC) and ultra-high-performance fibre-reinforced concrete (UHPFRC) are presented and compared to the conventional reinforced concrete (RC) solution. Benefits of fibre reinforcement are shown at both service and ultimate levels.