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提出一种由型钢外包活性粉末混凝土(RPC)组成且不配置纵向受力钢筋的新型组合柱.为研究这种组合柱在偏心荷载作用下的受力性能和破坏形态,设计了3根不同RPC强度等级的型钢外包RPC组合柱进行偏心受压试验,观察其受力破坏过程及破坏形态.试验结果表明:型钢外包RPC偏压柱具有较强的变形能力,在偏心距为60mm的偏心荷载作用下表现为大偏心受压破坏;型钢外包RPC偏压柱的极限承载力主要与RPC强度等级有关,且随RPC强度等级的提高而增大.最后,参照型钢普通混凝土组合柱极限承载力的计算方法,建立了型钢外包RPC偏心受压组合柱的极限承载力计算公式.
A new type of composite column which is composed of steel-encased RPC is proposed and is not equipped with longitudinal reinforcement.In order to study the mechanical behavior and failure mode of the composite column under eccentric load, three different RPC Strength of the steel clad RPC composite column eccentric compression test to observe the process of failure and destruction of the form.The results show that: steel outsourcing RPC bias column has a strong deformation capacity, the eccentric load of 60mm eccentric load The ultimate bearing capacity of the steel-clad RPC biased column is mainly related to the RPC strength grade, and increases with the increase of the RPC strength grade.Finally, the ultimate bearing capacity of the reference steel ordinary concrete composite column is calculated Method, the formula for calculating the ultimate bearing capacity of the composite column subjected to the eccentric load of steel clad steel was established.