（中国建筑科学研究院建筑结构研究所  北京  100013）
【提要】  对横穿混凝土后浇带钢筋对后浇带效能的不利影响进行了详细分析，给出了导致后浇带失效的横穿钢筋最大配筋率ρs，max及应用实例，提出了相应的实用设计建议。如建议近似在0～0.5ρs，max范围内控制横穿后浇带的设计配筋；对横穿后浇带
的钢筋尽可能采用搭接连接方式等。
【关键词】  混凝土收缩  混凝土后浇带  横穿后浇带钢筋  后浇带效能
Calculation Analysis for Bad Effect on Efficiency of Postcasting Band in Concrete Structures by Crossed Reinforcing Steel Bars/Pan Li（Institute of Building Structures，China Academy of Building Research，Beijing 100013，China）
Abstract:Based on the calculation analysis about the bad effect on efficiency of postcasting bands in concrete structures by the crossed reinforcing steel bars，the formula of the maximum ratio ρs，maxof crossed steel bars is deduced. Samples of ρs，maxand the useful design proposals are given for the practical need of superlong and continue concrete structures.
Keywords:concrete shrink；postcasting band；steel bars across postcasting concrete band；efficiency of postcasting concrete band