单向体外预应力加固混凝土双向板的弯压性能分析

Analysis of concrete two-way slabs strengthened by the one-way external prestressing method

以张拉单向体外预应力加固的混凝土双向板为研究对象,说明了体外预应力在双向板加固中的构造特点,推导给出了几种加固工况下四边简支双向板弯曲变形和平面内压力荷载作用效应的计算公式。研究表明,单向张拉体外预应力可以减少双向板的挠度变形,降低双向板的内力,具有明显的加固效果。

This paper deals with the two-way concrete slabs strengthened by the external prestressing technique. The external prestressing＇s construction properties in two-way slabs are illustrated. Some calculating formulas are also deduced for simply-supported two-way slabs. Studies indicate that the two-way slab＇s deflection and internal forces can be reduced by using the external prestressing technique, and its strengthening mechanism is obvious.