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Bearing capacity of reactive powder concrete reinforced by steel fibers
Highlights Nine SFR-RPC prismatic blocks were tested under local load to emulate anchorage zone. Steel fibers added in RPC mixture improve local bearing capacity and stiffness. Duct weakens local wedge zone of SFR-RPC and decreases of bearing capacity. An equation of SFR-RPC local bearing capacity is proposed.
Abstract Steel fiber-reinforced reactive powder concrete (SFR-RPC) improves the behavior of steel fiber post-tensioned anchorage zones by enhancing the fiber’s tensile strength. As part of this study, nine SFR-RPC prismatic blocks, each with a central longitudinal duct, were subjected to pressure testing to simulate the anchorage zone. The pressure testing results indicate that cracking loads are close to failure loads. Although expansion occurred in the middle of the blocks at failure, integrity was maintained for all of specimens. A local SFR-RPC wedge zone, ahead of the bearing plate, was weakened by a duct. A comparison of the SFR-RPC samples, with and without ducts, shows a weakening effect indicating there was a change in the cracking load and a decrease of bearing capacity for SFR-RPC without a duct. As part of this paper, a simple expression to determine SFR-RPC bearing capacity is proposed. The expression is verified by experimental results and considers the steel fiber enhancement and weakening effect.
Bearing capacity of reactive powder concrete reinforced by steel fibers
Highlights Nine SFR-RPC prismatic blocks were tested under local load to emulate anchorage zone. Steel fibers added in RPC mixture improve local bearing capacity and stiffness. Duct weakens local wedge zone of SFR-RPC and decreases of bearing capacity. An equation of SFR-RPC local bearing capacity is proposed.
Abstract Steel fiber-reinforced reactive powder concrete (SFR-RPC) improves the behavior of steel fiber post-tensioned anchorage zones by enhancing the fiber’s tensile strength. As part of this study, nine SFR-RPC prismatic blocks, each with a central longitudinal duct, were subjected to pressure testing to simulate the anchorage zone. The pressure testing results indicate that cracking loads are close to failure loads. Although expansion occurred in the middle of the blocks at failure, integrity was maintained for all of specimens. A local SFR-RPC wedge zone, ahead of the bearing plate, was weakened by a duct. A comparison of the SFR-RPC samples, with and without ducts, shows a weakening effect indicating there was a change in the cracking load and a decrease of bearing capacity for SFR-RPC without a duct. As part of this paper, a simple expression to determine SFR-RPC bearing capacity is proposed. The expression is verified by experimental results and considers the steel fiber enhancement and weakening effect.
Bearing capacity of reactive powder concrete reinforced by steel fibers
Zhou, Wei (author) / Hu, Haibo (author) / Zheng, Wenzhong (author)
Construction and Building Materials ; 48 ; 1179-1186
2013-07-25
8 pages
Article (Journal)
Electronic Resource
English
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