钢骨混凝土柱轴压比限值的试验研究

Experiment and Study of Limit Values of Axial Compression Ratio for SRC Columns

根据钢骨混凝土柱正截面承载力和低周反复水平力作用下的静力试验结果，本文从钢骨混凝土柱界限破坏时内力的平衡条件出发，推导了轴压比限值的理论计算公式，并简化后提出了其实用计算公式，也给出了工程实例。这个公式是与钢筋混凝土柱的轴压比限值连贯的。计算表明，钢骨混凝土柱的轴压比限值一般比钢筋混凝土柱的高（２５～５０）％。

According to the test results of the carrying capacity of normal cross section and static tests of reversed cyclic horizontal loading of steel reinforced concrete(SRC) columns, this paper derives the theoretical calculation formulas of limit values of axial compression ratio(N/fc bh) for SRC columns based on the balanced condition of internal forces in the case of balanced failure. Meanwhile practical calculation formulas are put forward after simplifying the derived formulas with numerical examples given. These formulas are linked up with the limit values of axial compression ratio of RC columns. The calculated results show that the limit values of axial compression ratio of SRC columns are generally (25-50)% higher than those of RC columns.