非对称预应力筋两端对称张拉伸长量计算方法

摘要

预应力施工是桥梁上部结构施工的控制性关键工序，其施工质量直接影响到结构的使用性和安全性。结合工程实例．探讨非对称预应力筋在两端对称张拉时伸长量的计算方法，总结了影响预应力筋理论伸长量值的几个因素，通过改进计算方法以提高计算的准确性，达到有效控制预应力施工的效果。%Prestressing construction is the key process for the control of the bridge superstructure construction, the construction quality directly affects the applicability and safety of the structure. In combination with project examples, the sym- metrical tensile elongation calculation method for both ends asymmetric prestressed steels are studied, factors effecting theo- retical elongation of prestressed steels are summarized, in order to improve the accuracy of the calculation and effectiveness of the prestressed construction.