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采用双剪统一强度理论,充分考虑中主应力对钢管活性粉末混凝土(RPC)短柱的影响进行研究,推导出受压构件极限承载力公式;在此基础上结合粘结滑移理论,提出考虑钢管与RPC组合界面粘结力作用的轴压短柱的承载力统一解。并将计算结果与文献资料的试验数据进行比较,结果吻合较好,表明统一强度理论和粘结滑移理论对钢管RPC柱的理论计算有非常好的适用性。该结果为钢管RPC柱承载力计算方法的优化设计提供了一定的理论依据,对工程设计有一定的参考价值。
Based on the double shear unified strength theory, the influence of middle principal stress on RPC short columns is studied, and the formula of the ultimate bearing capacity of the compression member is deduced. Based on this, combined with the theory of bond slippage, Uniform solution of bearing capacity of axially compressed short column with bond between steel pipe and RPC. The calculated results are compared with the experimental data of the literature. The results agree well with each other, which shows that the unified strength theory and the theory of cohesion slip have very good applicability to the theoretical calculation of RPC pipe columns. The results provide a theoretical basis for the optimal design of RPC RPC bearing capacity calculation method, and have certain reference value for engineering design.