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本文通过二批框架扁梁1／3缩尺模型的结构长期性能及抗裂性的试验观测，探索了混合配筋预应力混凝土框架扁梁楼盖结构的截面长期应力的变化规律。试验结果表明混凝土的徐变和收缩将引起扁梁和密助板之间发生应力重分布．而普通钢筋含量高将降低其应力重分布的程度。
In this paper, through the experimental observation of the long-term performance and crack resistance of the two batches of flat beam 1 / 3 scale model, the long-term stress of the cross-section of the flat beam floor structure with mixed reinforcement prestressed concrete frame is explored. The test results show that the creep and shrinkage of concrete will cause stress redistribution between flat beam and dense assisted plate. The high content of ordinary steel bars will reduce the degree of stress redistribution.