This means that the design will usually have only published values of yield strength, ultimate strength, and percentage elongation.

这就是说，设计人员通常只能利用那些公开发表的屈服强度、极限强度和延伸率等数据资料。

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The formulas to calculate the yield and ultimate curvature of beam are worked out considering the action of the stirrup, and the accuracy of the formula was proved by experiment.

提出屈服曲率和极限曲率(并考虑箍筋影响)的计算公式，与试验结果作比较，验证公式的有效性。

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Using plastic yield line theory, three yield line patterns are analysed and the formulas of the ultimate bearing capacity are obtained.

采用塑性铰线理论，对三种可能的塑性铰线形式分别进行分析，得到极限承载力的解析式。

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