超高强预应力钢铰线锚具的研究

【作者】 唐小萍；

【导师】 韩之俊； 穆成君；

【作者基本信息】 南京理工大学 ， 管理科学与工程， 2001， 硕士

【摘要】 随着预应力技术的发展和冶金工业冶炼技术的不断进步，预应力钢绞线的强度不断提高，由原来1470MPa提高到1860MPa，90年代末期已出现了2000MPa超高强钢绞线，而原来的是在90年代初期按抗拉强度为1860MPa的钢绞线标准设计的，因此，原有的锚具已不能适应现有超高强度2000MPa的钢绞线强度要求，在工程中出现了断丝滑移现象，同时，在使用和设计时仍按1860MPa钢绞线的指标进行设计应用，没能充分发挥材料的力学性能，造成材料浪费。鉴于上述情况。通过分析国内外锚具发展情况，结合超高强预应力钢绞线(2000MPa)的性能特点，本课题采用理论计算、计算机有限元分析、试制、试验并小批量生产研制过程，对HVM15锚具进行了研究。本文主要对本课题研究内容和所做过的工作进行总结报告。更多还原

【Abstract】 With the development of prestressing technology and improvement of metallurgical industry, the strength of prestressed concrete strands increased more and more from the first 1470MPa to 1860MPa. In the end of 90’, the strands with 2000MPa strength became available. Because of the former anchorage systems designed according to matching 1860MPa strength strands in the beginning of 90’, they can not be suitable any more for the super strength strands with 2000MPa. Therefore, some accidents occurred such as strands sliding and broken when tensioning. In addition, the advantages of the new materials as their high mechanics performance are not be used completely as the prestressing structures was designed as per the 1860MPa strands, which will result in the waste of materials, In view of the above-mentioned facts, by means of analyzing the development of anchorage systems home and abroad, in connection with the characteristics of the super strength strands(2000MPa), this topic made a research on HVM15 Anchorages by theoretical calculation and finite element analysis, and also on the manufacturing process and test. This article is the summary of the research and the work what we have done for this project.更多还原