（北京中联环建文建筑设计有限公司，北京 100086）

［摘要］建立了预应力混凝土双向板的平衡荷载法与现行规范的截面裂缝控制验算应力表达式之间互通的力学条件与数学关系式，提出了后张预应力混凝土矩形双向板在正常使用极限状态下有效预拉力的直接设计法。最后阐述了当预应力双向板的支承边为梁时，在设计中应注意的3个问题。

［关键词］后张预应力混凝土；双向板；荷载平衡法；裂缝控制验算；有效预拉力

Direct design method for effective prestress force of post-tensioned prestressed concrete two-way slab

Zhou Xuqi（United Architects & Engineers Co.,Ltd.，Beijing 100086,China）

Abstract:It establishes mechanical qualification and mathematical model between the load-balancing method and the formula for the differential prestress limit based on the crack control test. The direct design method for the effective prestress of the prestressed concrete two-way slab in the service limit state are determined.In the end, it explained three problems in design when this slab′s supporting is beem.

Keywords:post-tensioned prestressed concrete; two-way slab; loadbalancing method;the Crack-control test; effective prestress force

作者简介：周旭岐，一级注册结构工程师，教授级高工。Email:ydmzxq@yahoo.com.cn。