连续梁中，刚性支承处的垂直变形必须为零。
In a continuous beam the vertical deflexions at the rigid supports must be zero.
其结论不仅适用于刚性支承，而且适用于弹性支承和有支座沉陷的情况。
The conclusion in the paper is suitable not only for rigid supports, but for elastic supports and support sinking.
实际工程中的拱结构并不是采用固支或简支等理想刚性支承，而是具有弹性支承、阻尼支承等柔性动边界。
Rigid supports like clamped and simple supports are not actually adopted at the ends of arches in the engineering, but flexible supports such as elastic supports, damping supports are adopted.
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