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首页> 外文会议>Geohunan international conference >Development and verification of creep constitutive model for asphalt mixture based on continuum damage theory
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Development and verification of creep constitutive model for asphalt mixture based on continuum damage theory

机译：基于连续损伤理论的沥青混合料蠕变本构模型的建立与验证

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The three-stage creep behavior of asphalt mixture could be considered as the results of a competition between damage and hardening. Therefore, the damage and hardening variables were both introduced into Burgers model for modification. The series-wound dashpot in Burgers model was modified with a hardening variable and the undamaged mechanistic model was derived from rheological. Then, Kachanov's equation of damage evolution was adopted and a new creep constitutive model coupled with damage was established by Lemaitre's effective stress principle. Subsequently, static creep tests of two asphalt mixtures were conducted to validate the modified model, and an algorithm was established to determine the model parameters from typical laboratory data. The proposed model and algorithm were demonstrated through laboratory test results, and the analysis results matched the test perfectly. It is indicated that the proposed model can describe the three-stage behavior well.
机译：沥青混合料的三阶段蠕变行为可以看作是损伤与硬化之间竞争的结果。因此，将损坏和硬化变量都引入到Burgers模型中进行修改。用硬化变量修改了Burgers模型中的绕线式减震器，并从流变学推导了未损坏的机械模型。然后，采用了Kachanov的损伤演化方程，并根据Lemaitre的有效应力原理建立了一个新的蠕变本构模型。随后，对两种沥青混合料进行了静态蠕变测试，以验证修改后的模型，并建立了一种从典型实验室数据确定模型参数的算法。通过实验室测试结果证明了所提出的模型和算法，分析结果与测试结果完全吻合。结果表明，所提出的模型可以很好地描述三阶段行为。

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