错层楼盖的温度应力及预应力措施研究

Research on the Temperature Stresses and Prestressing Details of Split-level Floor

在超长超宽混凝土楼盖中,温度应力是设计时考虑的重要因素。错层的存在可能影响温度应力的数值。文章采用理论分析和有限元计算对照的手段,说明较小的错层对温度应力的影响有限。针对采用预应力抵抗温度应力的措施,文章提出两种方案用以处理错层处的预应力钢筋构造,分别适用于不同的错层场合。

The problem of temperature stresses is one of the key problems involved in concrete floors with large longi-tude length.The introduction of split-level will affect the magnitude of the stress. This paper analyzes this effection in aids of finite element method, points out that normal degree of interleaving causes small changes in temperature stresses. Also, the author presents two detailing to handle the prestressing tendons in the staggered area, corresponding to two different situations respectively.