Abstract: This paper analyses the calculating formulae for the creep loss of stress prescribed in the "Design Specifications for Highway" the prestressed concrete bridges being less precise and unsafer in the majority cases.We advance the formalae for the creep loss of stress in prestressed concrete structures',which is based on the linear elasto-creep body theory.The formulae for creep deformation are also presented in this paper.Calculation results and test values can be put in good concord.

摘要： 本文在分析了我国《公路预应力混凝土桥梁设计规范》计算徐变应力损失公式存在精度不高,且在大多数情况下偏于不安全等问题的基础上,根据线性弹性徐变体理论,提出了预应力混凝土构件徐变应力损失的计算公式。该式不仅在理论上更加完善,而且计算简便。并在此基础上又提出了徐变变形的计算公式,计算结果与实测值也能较好地符合。