Abstract: Preflex prestressed-concrete beam is a new type of prestressed concrete structure. But it is now still on the initial stage of theoretical research and practical use in our country. The reflection and deflection of the preflex beam are two important parameters for design and construction controlling. This paper has presented theoretical formulas to calculate these two parameters. By using the results calculated by the formulas to compare with the test results of two test beams and sixteen beams used in actual engineering, it has been proved that the formulas are acceptable and can be used for design.

Key words: preflex beam, reflection, deflection, calculation

摘要： 预弯预应力砼梁是一种新型预应力砼结构,目前在我国尚处于理论研究和实际应用的初期阶段。预弯梁的回弹量和挠度是其设计计算和施工控制的两个重要参数。本文对这两个参数提出了理论计算公式,并与两片试验梁和16片实际工程中吏用的梁的实测值作了对比,其结果证明本文提出的计算公式是可行的,可供设计工作使用。

关键词: 预弯梁, 回弹, 挠度, 计算