随着偏心率的增大，钢管对核心混凝土的套箍力作用不断削弱，构件的极限承载力也明显下降。
With the load eccentricity ratio increased, the confinement of steel tube to core concrete and the ultimate carrying capacity of the column decreased.
提出了偏心受压的钢管混凝土考虑钢管径向应力梯度对紧箍作用影响的核心混凝土的应力-应变关系模型。
A stress-strain relation of core concrete is presented, in which the confinement effect of steel tube to core concrete is modified by the circumference stress grade.
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