小股钢绞线在大跨度圆孔板中的应用

APPLICATION OF CABLE WIRE WITH SMALL STRAND IN THE LONG SPAN SLAB WITH CIRCULAR HOLLOW

研究了小股钢绞线预应力砼空心圆孔板的设计，给出了设计步骤、主要公式及相关参数选用时应注意的问题，对钢筋应力增大系数进行了讨论，最后给出本市标准图６ｍ跨度预应力板的设计例题，并进行了与现有预应力空心板在用钢量方面的比较．

This paper discussed the design of prestress reinforced concrete slab with circular hollow, which reinforced by cable wire with small strand. The design procedures, main formule and the caution for selection of relative parameters are given. The enlarged factor of steel bar stress was discussed here. In the end, the design example of prestress slab spanning 6m in Tianjin Municipal Standard Drawing was given out, and its steel expense compared with the current prestress hollow slab.