（浙江省建筑设计研究院， 杭州 310006）

［摘要］混凝土角板两相邻边简支两相邻边固支，是最常见的楼板类型。工程上根据跨中弯矩和内支座负弯矩计算受力钢筋，简支边支座配置构造筋。基于弹性薄板小挠度理论，求解了板内弯矩和扭矩分布和两者数值关系。分析表明，在简支边角部部位，混凝土角板内力分布复杂，角部容易产生裂缝。依照现行做法，在带有简支边的角部配置构造配筋无法满足受力需要，必须配置受力钢筋。通过对比与四边固支、四边简支矩形板的内力分布差异,揭示了混凝土角板设计存在的问题，并对其合理设计提出了建议；其结论也可为边跨板设计提供参考。

［关键词］矩形角板； 两相邻边简支两相邻边固支； 小挠度理论； 配筋修正

中图分类号：TU375-2文献标识码：A文章编号：1002-848X(2020)13-0013-05

Internal force analysis and reinforcement modification of rectangular corner slab considering torque influence

ZHU Wenwei, YANG Xuelin, YUE Yanling

（Zhejiang Architectural Design and Research Institute， Hangzhou 310006， China）

Abstract:Concrete corner slabs are simply supported on two adjacent sides and fixed on two adjacent sides. This is the most common type of floor slab. In the project, the reinforced steel bars are calculated according to the mid-span bending moment and the negative moment of the inner bearing, and the simply supported side is configured with structural steel bars. Based on the theory of small deformation theory of elastic thin plate, the bending moment and torque distribution in the slab and the numerical relationship between them were solved. The analysis shows that, in the corners of simply supported sides, the internal force distribution of concrete corner plates is complicated, and the corners are prone to cracks. According to the current practice, the configuration of structural steel bars at the corners with simply supported sides can not meet the stress requirements, and force steel bars should be configured. The problems existing in the design of concrete corner slabs were revealed, by comparing the internal force distribution of the slab with the rectangular slabs with four fixed sides and the rectangular slabs with four simply supported sides, and some suggestions were put forward for its reasonable design. The conclusion can also provide a reference for the design of side span slabs.

Keywords:rectangular corner slab; two simply supported adjacent sides and two fixed supported adjacent sides; small deformation theory;  reinforcement modification

作者简介：祝文畏，硕士，高级工程师， 一级注册结构工程师,Email:wenwei_z@163.com。