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在后张预应力混凝土构件中,由于在张拉过程中构件发生弯曲和轴向变形,分批张拉的预应力筋内先行张拉的预应力筋所建立的预应力值受后张拉预应力筋的影响而减少。本文从理论上分析了这一影响,并给出了由此所需超张拉力值的实用计算方法。
In post-tensioned prestressed concrete structures, prestressing values established by prestressed tendons that are prestressed in batches of prestressed tendons are subject to post-tensioning due to bending and axial deformation of the components during tensioning. The effect of stress tendons decreases. This paper analyzes this effect theoretically and gives a practical calculation method for the required tensile strength.