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首页> 外文会议>6th International conference on advanced composite materials in bridges and structures 2012 >Mechanical Behaviour of Ultra-high-Performance Short Fibre Reinforced Concrete Beams Reinforced With Internal FRP Bars
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Mechanical Behaviour of Ultra-high-Performance Short Fibre Reinforced Concrete Beams Reinforced With Internal FRP Bars

机译：内部FRP筋增强超高性能短纤维增强混凝土梁的力学性能

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摘要

The main objective of the research project reported in this paper is to develop a new type of high performance lightweight beams that combine FRP rebars cast in a ultra-high-performance concrete with short fibre reinforcement (UHPC-SFR) to have better performance than beams constructed using traditional materials (timber, steel, or RC beams). The hybrid beam has a high compressive and tensile capacity to sustain high bending moments and high shear loads. The hybrid beam, thus obtained, possesses a lower bending stiffness than a glulam timber beam or steel beam of similar overall dimensions, but a higher ultimate load capacity. One model developed to validate this concept is presented in this paper. It is an analytical model based on the usual force equilibrium hypotheses. The load-displacement and moment-curvature relationships are compared to experimental results obtained from 5 large-scale beams. The results show good correlation between analytical and experimental results, and illustrate the potential use of such hybrid beams for civil engineering structures.
机译：本文报道的研究项目的主要目标是开发一种新型的高性能轻型梁，该梁将在超高性能混凝土中浇筑的FRP钢筋与短纤维增强材料（UHPC-SFR）相结合，从而具有比梁更好的性能。使用传统材料（木材，钢或RC梁）建造。混合梁具有较高的压缩和拉伸能力，可以承受较高的弯矩和较高的剪切载荷。这样获得的混合梁比具有相似总体尺寸的胶合木梁或钢梁具有更低的弯曲刚度，但具有更高的极限承载能力。本文提出了一种验证该概念的模型。它是基于通常的力平衡假设的分析模型。将载荷-位移和弯矩-曲率关系与从5个大型梁获得的实验结果进行了比较。结果表明分析结果与实验结果之间具有良好的相关性，并说明了这种混合梁在土木工程结构中的潜在用途。

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