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Abstract Based on two basic considerations, (1) the enhancement of bearing capacity by the inclusion of confining spirals and (2) the crack-bridging and energy-absorbing improvements gained by adding steel fibers to the mixture, steel fiber-reinforced reactive powder concrete (SFR-RPC) reinforced by steel spirals can be applied to post-tensioned anchorage zones. Twelve SFR-RPC prisms containing steel spirals and a longitudinal duct hole were loaded at high concentration over a limited circular area. The tests indicated that all specimens retained integrity at failure and exhibited no less than four radial cracks, the entire depression occurred on the loading-end surface, and the splitting tendency generally developed below the first turn of the spiral if the wedge cone formed ahead of the bearing plate. Three major factors related to the geometry of the zone directly influence the bearing capacity: (1) the local aspect ratio of the net area of the concrete supporting the plate to the area of the bearing plate, (2) the core aspect ratio of the area of the bearing plate to the area of the core surrounded by the steel spirals, and (3) the steel ratio of the spirals. An expression of the bearing load capacity is proposed on the basis of the testing results.
Abstract Based on two basic considerations, (1) the enhancement of bearing capacity by the inclusion of confining spirals and (2) the crack-bridging and energy-absorbing improvements gained by adding steel fibers to the mixture, steel fiber-reinforced reactive powder concrete (SFR-RPC) reinforced by steel spirals can be applied to post-tensioned anchorage zones. Twelve SFR-RPC prisms containing steel spirals and a longitudinal duct hole were loaded at high concentration over a limited circular area. The tests indicated that all specimens retained integrity at failure and exhibited no less than four radial cracks, the entire depression occurred on the loading-end surface, and the splitting tendency generally developed below the first turn of the spiral if the wedge cone formed ahead of the bearing plate. Three major factors related to the geometry of the zone directly influence the bearing capacity: (1) the local aspect ratio of the net area of the concrete supporting the plate to the area of the bearing plate, (2) the core aspect ratio of the area of the bearing plate to the area of the core surrounded by the steel spirals, and (3) the steel ratio of the spirals. An expression of the bearing load capacity is proposed on the basis of the testing results.
Bearing capacity of steel fiber reinforced reactive powder concrete confined by spirals
Materials and Structures ; 48 ; 2613-2628
2014-06-14
16 pages
Article (Journal)
Electronic Resource
English
Steel fiber reinforced-reactive powder concrete (SFR-RPC) , Steel spiral , Core concrete , Local pressure , Local aspect ratio , Core aspect ratio , Steel ratio , Bearing capacity Engineering , Structural Mechanics , Materials Science, general , Theoretical and Applied Mechanics , Operating Procedures, Materials Treatment , Civil Engineering , Building Materials
Bearing capacity of steel fiber reinforced reactive powder concrete confined by spirals
| British Library Online Contents | 2015
Bearing capacity of steel fiber reinforced reactive powder concrete confined by spirals
| Online Contents | 2015
Bearing capacity of steel fiber reinforced reactive powder concrete confined by spirals
| Online Contents | 2014
Bearing capacity of steel fiber reinforced reactive powder concrete confined by spirals
| Online Contents | 2014