碳纤维布预应力高性能混凝土梁的力学性能

Journal of Residuals Science & Technology Pub Date : 2016-01-01 DOI:10.12783/ISSN.1544-8053/13/4/S16

W. Xue, X. H. Wang, R. Zheng

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引用次数: 0

摘要

高性能混凝土(HPC)和纤维增强聚合物(FRP)的优点可以结合在混凝土结构中，以改善结构的力学性能。本文对6根高性能混凝土浇筑梁和碳纤维布预应力梁进行了试验和讨论。试验变量包括CFRP股的局部预应力比(PPR)和增强材料(钢和玻璃钢)。试验结果表明，所有梁均以受压破坏和受拉破坏两种破坏模式破坏。所有梁的极限挠度均达到跨度的1/70 ~ 1/41，钢配筋梁的延性系数均大于3.5(除配筋率最高的梁外)，具有良好的变形性和延性。局部预应力比(PPR)的增加对延性有积极的影响。玻璃钢加固梁的延性远低于钢加固梁，但其变形能力相当。

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Mechanical Behaviors of High Performance Concrete Beams Prestressed with CFRP Strands

The merits of high performance concrete (HPC) and fiber reinforced polymer (FRP) could be combined for using in the concrete structures to improve the structural mechanical behavior. Six beams cast with HPC and prestressed with Carbon FRP (CFRP) strands were tested and discussed in this paper. Test variables included partial prestressing ratio (PPR) of CFRP strands and material of reinforcements (steel and Glass FRP). Test results indicated that all the beams failed in two modes, i.e., compression failure mode and tension failure mode. The ultimate deflection of all the beams reached 1/70-1/41 of the spans and the ductility coefficients of the steel reinforced beams were higher than 3.5 (except the one with the highest steel reinforcement ratio), indicating good deformability and ductility. An increase in partial prestressing ratio (PPR) had a positive effect on ductility. The ductility of Glass FRP reinforced beam was much lower than that of steel reinforced beams while the deformability was quite similar.

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来源期刊

Journal of Residuals Science & Technology 环境科学-工程：环境

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： The international Journal of Residuals Science & Technology (JRST) is a blind-refereed quarterly devoted to conscientious analysis and commentary regarding significant environmental sciences-oriented research and technical management of residuals in the environment. The journal provides a forum for scientific investigations addressing contamination within environmental media of air, water, soil, and biota and also offers studies exploring source, fate, transport, and ecological effects of environmental contamination.