预应力薄板迭合楼板是下部为预制预应力薄板(一般厚5～8厘米)和上部为现浇混凝土(厚度大于薄板的厚度)迭合而成的楼板(图1)。当上部现浇混凝土达到设计强度后,拆除薄板下部支撑,薄板与上部现浇混凝土成为一个整体,共同工作。薄板的预应力主筋即作为迭 The prestressed thin-wall superimposed floor slab is a floor slab in which the lower part is a prefabricated pre-stressed sheet (typically 5 to 8 cm thick) and the upper part is cast-in-place concrete (thickness greater than the thickness of the sheet) (Fig. 1). When the upper cast-in-place concrete reaches the designed strength, the lower support of the thin plate is removed, and the thin plate and the upper cast-in-place concrete become a whole and work together. The prestressed main bars of the sheet serve as