CFRP绞线粘结式锚具的静力试验研究

发布时间：2018-01-11 04:15

本文关键词：CFRP绞线粘结式锚具的静力试验研究　出处：《中外公路》2017年01期 　论文类型：期刊论文

更多相关文章： CFRP绞线 RPC 锚具 锚固形式 锚固性能

【摘要】：为研究以活性粉末混凝土(RPC)作为粘结介质的粘结式锚具对CFRP绞线的锚固性能,采用了两种锚固形式(整束锚固和分散锚固),共计16个试件进行了拔出试验研究。结果表明:CFRP绞线在锚固区内的锚固形式对锚固性能影响显著,在相同锚固长度下,分散锚固形式较整束锚固形式具有更高的锚固效率;对于分散锚固形式,其锚固性能随着边丝张开角度的增大进一步提高,当边丝张开角度为5°时,绞线由于较大剪切效应而发生承载力较低的折断破坏,因此,分散锚固形式的边丝张开角宜为3°~5°。
[Abstract]:In order to study the anchoring performance of CFRP strands with reactive powder concrete (RPC) as bonding medium, two kinds of anchoring modes (whole bundle Anchorage and dispersed Anchorage) were adopted. A total of 16 specimens were pull-out. The results showed that the anchoring form of the w CFRP strand in the Anchorage zone had a significant effect on the anchoring performance, and the anchoring length was the same. The form of dispersed anchoring has higher anchoring efficiency than the form of whole beam anchoring. For the dispersed anchoring form, the anchoring performance is further improved with the increase of the opening angle of the edge wire. When the opening angle of the edge wire is 5 掳, the fracture failure of the strands occurs because of the larger shear effect. The opening angle of the edge wire in the form of dispersed Anchorage should be 3 掳or 5 掳.
【作者单位】：湖南大学土木工程学院;
【基金】：国家自然科学基金资助项目(编号:51478177)
【分类号】：U446.1
【正文快照】： 缆索承重桥梁中目前采用的传统钢制拉索普遍面临自重大特别是由于钢材锈蚀所导致的结构耐久性问题。碳纤维增强塑料CFRP(Carbon Fiber Rein-forced Plastic)以其强度高、重量轻和免锈蚀的特征有望成为传统钢制拉索和预应力筋的替代品而应用于工作在较恶劣环境下的工程结构中。

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