（1 同济大学 上海 200092；2 北京理正软件设计研究院 100044）
【提要】 上部结构-地基-基础（桩基）共同工作的实测结果均显示，基础底板钢筋的实测应力值与设计值（容许应力值）存在显著差异。结合工程实例，对影响基础底板钢筋应力计算值偏大的各种因素及影响程度进行了分析，指出现有计算方法的不足并提出了一些改进建议。
【关键词】 基础底板 钢筋应力 计算值 设计值 共同作用
Analysis on Reasons Effecting Calculated Stress of Steel Bar in Foundation Slab/Zhao Xihong1, Chen Wei2（1 Tongji University, Shanghai 200092, China; 2 Beijing Lizheng Institute of Software Design, Beijing 100044, China）
Abstract:The field experimental results of super structuresoilfoundation show that t
here is a remarkable difference between the experimental stress and design stress (allowable stress) of steel bar in foundation slab. An engineering case is taken as an example to analyze all factors and extents affecting the large calculating stress of steel bar stress in foundation slab in detail. The shortcomings of current calculating methods are pointed out and some suggestions are also presented.
Keywords:foundation slab; steel bar stress; calculating value; design value; interaction