屈服平台是指低碳钢及低强度级低合金钢的一种屈服行为。在拉伸试验屈服后应力几乎随应变不升高，不发生强化行为。这一段位伸曲线几乎是水平线段，故称平台。超过屈服平台之后材料才开始表现出强化行为。长屈服平台钢一般都有很好的塑性，但一旦屈服后不需加载就会出现明显的变形（即发生塑性流动）。
我们从具有屈服平台金属材料试验中发现，在屈服阶段的泊桑比总是存在剧减和剧增。
It is found in experiments on metals with yielding terrace that there always exists sudden down and up in Poisson's ratio during the yielding stage.
基于基础隔震结构的能量设计方法，推导出适用于双线性隔震器最佳屈服平台的应用公式。
Based on the energy design measures for base-isolation structure, the formula applicable to the optimal yield level of the bilinear isolator is derived.
所得结果表明，在屈服平台上，范性形变过程中内耗基本不变，且其值随范性形变速率的增加和测量频率倒数的增加而线性增加。
The results showed that on the yielding plateau, the internal friction did not change with the strain, but increased linearly with the increase of strain rate and varied inversely with frequency.
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