聚酯纤维增强复合塑料约束混凝土的受压性能研究

发布时间：2018-04-21 08:50

本文选题：聚酯纤维增强复合塑料 + 受压性能　；参考：《湖南大学》2015年硕士论文

【摘要】：纤维增强复合塑料因其具有比强度高,质量轻,耐腐蚀和施工方便等优点而被广泛运用于土木工程领域。随着经济的发展和材料科学的进步,绿色环保材料、可持续化材料,高性能化材料等越来越受到科研人员的重视。传统的人造纤维成本高、产量低无法凸显其在这一方面的优势,成本低廉、取材便捷、绿色可持续、增强效果良好的纤维材料成为越来越多的研究者研究和探索的重点。聚酯纤维是合成纤维中发展速度最快、产量最高、应用最广的纤维,其良好的材料性能和巨大的产业优势为其在纤维增强复合塑料的发展提供了支撑和可能,越来越多的研究者开始重视对聚酯纤维的研究和应用。本文主要对聚酯纤维增强复合塑料(PFRP,Polyester Fiber Reinforced Polymer/Plastic)约束混凝土的受压性能进行了研究,主要开展了以下研究工作：(1) PFRP拉伸性能试验研究。通过对不涂胶的聚酯纤维布和涂胶的不同层数的聚酯纤维布进行材性试验,本文得出了PFRP的基本力学性能,如断裂强度、断裂伸长率、应力-应变曲线等。(2) PFRP约束混凝土的受压性能研究。本文以不同外包层数PFRP和不同强度混凝土为变量,对36根底面直径为150mm、高度为300mm混凝土短柱进行了轴心受压试验。试验结果表明：与素混凝土相比,PFRP约束混凝土能够提高强度和延性。(3)PFRP约束混凝土的强度和极限应变模型分析。首先介绍部分存在的经典强度和极限应变模型,然后将试验值与模型计算值进行对比分析,最后提出本文建议的PFRP约束混凝土的受压性能的强度模型和极限应变模型。(4) PFRP约束混凝土的应力-应变模型分析。首先介绍部分存在的经典的应力-应变模型,然后将试验值和模型计算值进行对比分析,最后提出本文建议的PFRP约束混凝土的受压性能的应力-应变模型。本文研究结果表明：PFRP约束混凝土可以提高混凝土的强度、韧性和后期延性,有利于增强混凝土的抗压能力,防止混凝土发生崩塌,延缓破坏的突然性。
[Abstract]:Fiber reinforced composite plastics are widely used in civil engineering due to their high specific strength, light weight, corrosion resistance and easy construction. With the development of economy and the progress of material science, more and more attention has been paid to green environmental protection materials, sustainable materials and high performance materials. Traditional man-made fiber with high cost and low yield can not highlight its advantages in this area. Low cost, convenient material selection, green sustainable, and good enhancement effect fiber materials have become the focus of more and more researchers' research and exploration. Polyester fiber is the fastest growing fiber with the highest yield and the most widely used fiber. Its good material properties and huge industrial advantages provide the support and possibility for the development of fiber reinforced composite plastics. More and more researchers begin to pay attention to the research and application of polyester fiber. In this paper, the compressive properties of polyester fiber reinforced Fiber Fiber Reinforced plastic confined concrete are studied, and the following research work: 1) PFRP tensile properties are studied. In this paper, the basic mechanical properties of PFRP, such as breaking strength, elongation at break, have been obtained through the experiment on the properties of polyester fiber cloth without glue and polyester fiber cloth with different layers of glue. A study on compressive behavior of PFRP confined concrete with stress-strain curves. In this paper, the axial compression tests of 36 300mm concrete short columns with 150 mm bottom diameter and a height of 300mm have been carried out with PFRP and different strength concrete as variables. The experimental results show that the strength and ductility of PFRP confined concrete can be improved compared with plain concrete. First, the classical strength and limit strain models are introduced, and then the experimental results are compared with the calculated values. Finally, the strength model and ultimate strain model of PFRP confined concrete are proposed in this paper. The stress-strain model of PFRP confined concrete is analyzed. First, the classical stress-strain model is introduced, then the experimental values and the calculated values are compared and analyzed. Finally, the stress-strain model of the compressive behavior of PFRP confined concrete is proposed in this paper. The results show that the concrete confined by PFRP can improve the strength, toughness and later ductility of concrete, enhance the compressive capacity of concrete, prevent concrete from collapsing and delay the sudden failure of concrete.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU528;TU599

【参考文献】