钢管砼偏压构件稳定承载力计算的进一步研究

FURTHER RESEARCH ON STEADY BEARING CAPACITY CALCULATION OF STEEL CORE CONCRETE MEMBERS UNDER ECCENTRIC LOADING

本文采用压溃理论,考虑紧箍力的作用,假设危险截面上拉应力大于f_t的受拉区混凝土退出工作,而拉应力未超过f_t的受拉区混凝土仍参加工作,导出了确定钢管混凝土偏心受压构件稳定承载力的彼此连续的计算公式.经过分析及大量实测值的验证,证明公式是正确的.适用于各种偏心率、长细比的情况.彼此连续的公式便于电算偏制设计图表及其它应用。

In this paper, in accordance with the collapse theory and effect of confining force, a continuous formula determining the steady bearing capacity of eccentrically loaded steel core concrete member is derived from the assumption that in critical section the concrete always works except that the section's tensile stress is more than Re.The formula has been verified by analysis and verification of a large number of measured values,it is suitable for any eccentricity and slenderness ratio.Moreover, this continuous formula is convenient for making design diagrams by computer and other applications.