计算矩形横截面(空心和实心)的惯性。所有单位必须一致。

Calculates the cross sectional inertia for rectangular cross sections (hollow and filled). All units must be consistent.

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结果得到一个黑色的实心小矩形。

The result is a small, filled, black rectangle.

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近年来国内外工程中已较为广泛地应用了实心圆形及方矩形钢管混凝土结构。

In the past few years, solid concrete-filled steel tube has been widely used in engineering fields.

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