用回归分析法推算预应力钢丝的松弛率

To Calculate Relaxation Ratio of Prestressed Concrete Steel Wire by Regressive Analysis

用回归分析法确定了计算松弛率的经验公式，并对公式进行了精度分析。根据经验公式可在８０小时松弛率试验数据的基础上推算出１０００小时的松弛率。此法成功地用于生产中，从而解决了预应力钢丝１０００小时松弛率检验的难题。

Empirical formula for calculating relaxation ratio has been defined by regressive analysis and accuracy about formula has been analysed.According to empirical formula,relaxation ratio for 1000 hours can be calculated by test data of relaxation ratio for 80 hours.Now the method is successfully used in the production. Thereby difficult problem that we test relaxation ratio of prestressed concrete steel wire for 1000 hours has been solved.