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[提要]  在高層和超高層鋼筋混凝土建筑中，下部柱的內(nèi)力很大，其軸力可以達(dá)到3 000～4000kN甚至更高。在這種情況下，為減小柱子的截面，應(yīng)視軸力的大小分別采用高強(qiáng)混凝土、約束混凝土、鋼管混凝土和型鋼混凝土或其復(fù)合柱。文中介紹了這些柱型的性能及在國(guó)內(nèi)外的使用經(jīng)驗(yàn)和軸壓比限值，并給出了如何根據(jù)軸力大小進(jìn)行選型的算例。
[關(guān)鍵詞]  高層建筑  鋼筋混凝土柱  鋼管混凝土  型鋼混凝土  組合結(jié)構(gòu)

In tall and ultra-tall concrete buildings, the internal axial force in the lower columns is possible to reach
or exceeds 3 000~4 000kN.In this case, it is necessary to reduce the section of column by adopting the
high strength concrete, restrained concrete, concrete filled steel tubes, steel reinforced concrete or composite and mixed construction.The behaviour, using experience at home and abroad and maximum axial force of a column section for these types of columns are introduced. A digital example about how to choose a column type according to the axial force is also given.
Keywords:  high-rise building; reinforced concrete column; concrete filled steel tubes; steel reinforced
concrete; composite and mixed construction