预应力钢绞线应力松弛试验方法常用标准比对

Comparison of Common Standards for Pre-stressed Steel Strand Stress Relaxation Test Method

介绍了预应力钢绞线应力松弛试验国内外标准,将初始载荷、加载速度及方式、初始力保持时间、松弛试验周期、1 000 h松弛值判定标准等试验标准指标进行比对,指出应强化试验操作方法与标准要求的匹配性,保证试验数据的准确性。

The paper introduces domestic and international standards for the stress relaxation test ofpre-stressed steel strand, compares the test indices of primary load, loading speed and method, primaryforce holding time, relaxation test period, 1 000 h relaxation assessing standard and points out thematching of test method with requirement by the standard should be strengthened to ensure theaccuracy of test data.