当前位置: X-MOL 学术Sci. Eng. Compos. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Experimental and analytical study of bio-based epoxy composite materials for strengthening reinforced concrete structures
Science and Engineering of Composite Materials ( IF 1.9 ) Pub Date : 2021-01-01 , DOI: 10.1515/secm-2021-0024
Jules Assih 1 , Ivelina Ivanova 2
Affiliation  

This paper presents a new approach to strengthen reinforced concrete structures using natural fiber composites. Natural fibers are often used in civil engineering for thermal or acoustic insulation, but rarely are they employed to strengthen structures. Natural fiber composites are constituted of a matrix based on epoxy adhesive and aligned continuous fiber reinforcements. In this study, we investigate several fibers (carbon, hemp, fiberglass, and linen) in tensile and bending tests. The bending results show twice the magnification of the ultimate bending load in a strengthened specimen. The study also evaluates the stress distribution in the structure. In the case of a beam strengthened by a bonded carbon plate, the functioning of an assembly single lap and the optimal anchor length was determined by analogy. The analytical study describes the shear and peel stresses in the adhesive, composite, and concrete joints, revealing the optimum values of shear stress near the ends of the adhesive joint. The same was observed in concrete. The tests showed the influence of strengthening on the ultimate load and stiffness as well as the concentration of shear stresses at the ends of the adhesive joint.

中文翻译:

生物基环氧复合材料加固钢筋混凝土结构的试验与分析研究

本文提出了一种使用天然纤维复合材料加固钢筋混凝土结构的新方法。天然纤维通常用于土木工程的隔热或隔音,但很少用于加强结构。天然纤维复合材料由基于环氧树脂粘合剂和排列的连续纤维增强材料的基体构成。在这项研究中,我们在拉伸和弯曲测试中研究了几种纤维(碳纤维、大麻纤维、玻璃纤维和亚麻纤维)。弯曲结果显示,强化试样中极限弯曲载荷的放大倍数是两倍。该研究还评估了结构中的应力分布。在用粘合碳板加强梁的情况下,通过类比确定组装单搭接的功能和最佳锚固长度。分析研究描述了粘合剂、复合材料和混凝土接头中的剪切和剥离应力,揭示了粘合剂接头末端附近的最佳剪切应力值。在混凝土中也观察到同样的情况。试验表明,加强对极限载荷和刚度的影响以及在粘合接头端部的剪切应力集中。
更新日期:2021-01-01
down
wechat
bug