外包钢柱轴压比限值的研究

组合结构的类型之一外包钢柱已经在工程中大量出现，经常遇到的问题却是：柱截面由轴压比控制，而不是由配筋来控制。轴压比是影响其受力性能的主要因素，当轴压比不同时可能会发生不同的破坏，为了避免发生脆性破坏，在设计时就会出现柱截面很大的情况，在高层结构尤甚。本文针对轴压比课题进行了分析，结果发现，当结构的型钢型号、混凝土等级、柱截面尺寸变化时，其轴压比也是可变的。因此，在设计时应根据不同的情况采用不同的轴压比限值。

Limited values of axial compression ratio of steel encased concrete column

the steel encased concrete column has largely existed in engineering. But, the question often arises the section is controlled by axial compression ratio, and is not controlled by reinforcements. Axial compression ratio is the mainly factor that can impress capability of the steel reinforced column. When the axial compression ratio has changes different destruction be can happen. To avoid sudden construction, a big section is needed in design, especially in the high structure. This paper makes a analysis of the axial compression ratio, the result is: when structure profiled bar, concrete grade, column section size and so on change, the axial compression ratio is alterable too. So, different limited axial compression ratio can be used in the design.