目前在预应力钢绞线市场上产品较多,这些钢绞线各项指标虽然均满足规范要求,但在实际的预应力施工中由于其弹性模量公称直径等因素的取值范围对最终伸长值影响较大。本文结合某桥梁预应力张拉施工的钢绞线各项指标对钢绞线伸长值影响分析并提出钢绞线的进场控制要求。 At present, there are many products in the market of prestressed steel strand. Although all the indexes of these strand steel meet the requirements of the code, in the actual prestressed construction, due to the value range of factors such as the nominal diameter of elastic modulus, Long-term impact. In this paper, an analysis of the impact of various indicators of steel strand prestressed construction of a bridge on the elongation of steel strand and put forward the requirements of entry control of steel strand.