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首页> 美国政府科技报告 >Unidirectional Core-Shell Hybrids for Concrete Reinforcement - A Preliminary Study.
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Unidirectional Core-Shell Hybrids for Concrete Reinforcement - A Preliminary Study.

机译：用于混凝土加固的单向核壳混凝土 - 初步研究。

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Fiber-reinforced plastic (FRP) bars are currently being used to replace steel bars as concrete reinforcement. For non-prestressed applications, these FRP bars exhibit a relatively low modulus of elasticity and a lack of ductility. This report shows that two-fiber hybrid composites can be optimized to obtain a rebar with a modulus of elasticity equal to steel, as well as a pseudo-plastic behavior. This pseudo-plastic behavior corresponds to the gradual transfer of the load from the low-elongation fibers being ruptured to the high-elongation fibers. Hardening characteristics can be obtained which allow for a gradual fiber rupture. By placing the low-elongation fibers in the center of the rebar, and by winding the high-elongation fibers as a helical shell around this core, higher rebar strains to failure can be obtained. The ratio of the rebar failure strain to the rebar yield strain can be enhanced by increasing the shell fiber's angle with respect to the rebar longitudinal axis.

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