预应力等效作用对框架柱的影响

Influence of Equivalent Action of Prestress on Frame Column

大跨度预应力梁在预应力钢筋张拉后会增加刚度,部分软件增加了考虑预应力等效的有利作用选项。文中以实际工程为例,揭示了在不重视软件技术条件的情况下,盲目勾选软件给出的预应力等效作用,得出部分构件配筋严重不足的结论,以期为大跨度预应力梁的设计提供参考。

Long-span prestressed beams will increase the stiffness after the prestressed steel bars are tensioned, and some software have added a favorable action option considering the prestress equivalent. Taking an actual designed project as an example, this paper reveals that blindly selecting the equivalent effect of prestress given by the software without paying attention to the technical conditions of the software,leads to the conclusion that the reinforcement of some components is seriously insufficient.It provides a reference for the design of large-span prestressed beams.