BEARING CAPACITY OF RPC FILLED STEEL SHORT TUBE COLUMNS BASED ON THE UNIFIED STRENGTH THEORY AND THE BOND-SLIP THEORY
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摘要: 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。Abstract: With consideration of the intermediate principal stress,the calculation formula of bearing capacity of RPC filled steel tube columns under axial compression was deduced based on the twin shear unified strength theory.Combining with the bond-slip theory,new ultimate bearing capacity formula was derived with the highest regard for bond stress.Compared with the theoretical result and the experimental data,good agreement could be found.The results show that unified strength theory and the bond-slip theory are versatile in theoretical analysis of the column.The analysis results can provide a theoretical basis for the optimum design of RPC filled steel tube and the solution has an important practical value for engineering application.
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