In calculation, adopted load-unload criterion of stress wave propagation was to decide load-unload state of element and to adjusts and transfers internal stress for tensile failure element as well.

计算中用应力波传播的加卸载判别准则来决定单元的加卸载状态，对受拉破坏单元进行内部应力调整和应力转移。

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Suggestions are made to use the criterion to determine the load capacity of engineering piles by loading test.

并提出了利用该标准对工程桩作压载试验确定其承载力的有关建议。

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Research show that the method of extrapolating failure load and net section yield criterion are available.

研究表明，推算破坏载荷和净截面屈服判据是合理的，可用的。

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