A nonlinear and continuous strength degradation model is presented from the view point that fatigue damage process is the process during which material static strength degrades constantly.

从疲劳过程本质上是材料静强度不断退化的过程的观点出发，建立了一个非线性的、连续的强度退化模型。

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The total evolution index was induced and the FEM of material plastic damage model was supplied to simulate the nonlinear damage evolution of bridge structure subjected to the earthquake excitation.

引入了地震损伤的整体演化指标，通过有限元方法利用材料塑性损伤模型模拟桥梁结构在地震激励下的非线性损伤演化过程。

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Nonlinear characteristic of matrix material is considered in the bridging model constitutive theory of composite materials.

复合材料的桥联模型本构理论考虑了基体材料的非线性特性。

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