舒传谦
    （贵州工学院土建系  贵阳 550003）

[提要]  探讨当混凝土强度较高的柱穿过混凝土强度较低的楼层，形成不等强度的夹层柱时，如何计算该柱的静力承载能力。
[关键词]  夹层柱 混凝土表面强度 约束 应力扩散

Experiment and analysis showed that the capacity of concrete columns with intervening floor of lower strength depends on the load spreading to the surrounding floor, the horjzontal reinforcement restraint to the column - floor junction as well as on the floor concrete strength and the column restrict to the junction. The procedure's predicting values are better agreement with the test data than that of the current ACI Code specification and of Camble's formula in Joumal of ASCE.
Keywords: column- floor junction; concret strength; restriction; experiment; analysis