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     舒?zhèn)髦t
    （貴州工學(xué)院土建系  貴陽 550003）

[提要]  探討當(dāng)混凝土強(qiáng)度較高的柱穿過混凝土強(qiáng)度較低的樓層，形成不等強(qiáng)度的夾層柱時(shí)，如何計(jì)算該柱的靜力承載能力。
[關(guān)鍵詞]  夾層柱 混凝土表面強(qiáng)度 約束 應(yīng)力擴(kuò)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