钢管-钢骨混凝土组合柱轴压比限值的研究

The Study of the Limited Values of Axial Compression Ratio in the Steel Tube-Steel Concrete Composite Column

目的研究使钢管-钢骨混凝土组合柱发生延性破坏时所需要确定的轴压比限值.方法通过对钢管、钢骨的简化处理,从界限破坏出发,分析了钢管-钢骨混凝土组合柱轴压比限值的组成,建立了界限破坏时的计算简图,进而推导出轴压比限值的理论计算公式.结果在确定了轴压比限值的计算公式基础上,对其进行了简化计算,根据不同的抗震等级确定了试验中3个试件的轴压比限值.结论钢管-钢骨混凝土框架柱比钢管混凝土核心柱的轴压比限制提高10%左右,其值随着钢骨含率的增加而提高.因此相比钢管混凝土核心柱,钢管-钢骨混凝土组合柱具有更好的延性.

The study aims to find out the proper limited values of axial compression ratio of the steel tube- steel concrete composite column under the condition of ductility damage. After the simplified disposal of the steel tube and the steel, the composition of the limited values of the axial compression ration in steel tube - steel concrete composite column is analyzed from the angle of limit damage. Thus, the calculation formulas of limited values of axial compression ratio have been reduced, on the basis of the limited values of axial compression ratio of 3 short columns having been calculated. The result shows that the steel tube - steel concrete composite column has a better ductility.