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通过理论分析和缩尺模型试验,对水平荷载作用下空心板柱结构的受力性能进行了研究。通过对空心楼板截面钢筋、混凝土应变的分析,证实楼板截面抗弯应力沿板宽度范围的分布是不均匀的,即存在“剪力滞后”现象;通过对弹性阶段等代梁宽度系数的理论值、试验值及规范计算值进行比较,对弹性阶段等代梁计算宽度的取值进行了探讨,表明规范值是偏安全的,并给出了相同几何参数条件下空心板柱结构等代梁计算宽度的修正系数。
Through theoretical analysis and scale model test, the force performance of hollow slab-column structure under horizontal load is studied. Through the analysis of the reinforced concrete and the concrete slab in the hollow slab section, it is proved that the distribution of the flexural stress in the slab section along the width of the slab section is not uniform, that is, the phenomenon of “shear lag” exists. Theoretical value, test value and standard calculated value are compared, and the calculation of the equivalent width of the equivalent beam in the elastic phase is discussed. It is shown that the normalized value is partial safty and the equivalent geometric parameters of the hollow plate column structure are given Beam width correction factor.