锚具夹片回缩引起预应力损失的研究

针对国内很少有定量处理后张法锚塞回缩引起预应力损失的措施,笔者同时采用了锚圈口预应力损失试验和公式推导两种手段,寻找到了一种如何考虑锚塞回缩引起预应力损失的系统方法。在此基础上,对某工程9条预应力索道做了锚塞回缩引起预应力损失的实例演算,再通过函数拟合的办法,得到了运用方便的经验公式。最后,通过进一步地综合分析,得到了一些对后张法预应力工程设计、施工的有益结论。

A Study on Prestressing Loss of Anchorage Circle Caused by Anchorage Retraction

On the basis of some methods of prestressing loss caused by anchorage retraction,the test of anchorage circle prestressing loss and the formula deduction are adopted,furthermore,the systematic method of prestressing loss caused by anchorage retraction is proposed in this paper.Meanwhile,the prestressing loss of 9 prestressing cables are calculated in a actual engineering,and the convenient empirical formulas are presented based on function fitting.Finally,some results useful to post-tensioned prestressing engineering design and construction are obtained.