ABAQUS的二次开发及在土石坝静、动力分析中的应用

利用UMAT子程序，在ABAQUS中开发了用于静力分析的邓肯非线性弹性模型和用于动力分析的等效线性模型，丰富了ABAQUS软件的材料库；针对土石坝的分级填土施工、新填土层的位移修正、土石坝蓄水后的浸水湿化效应、坝体材料的液化判别和地震永久变形计算等土石坝分析中的特定问题在ABAQUS中的实现提出了相应的解决方案。算例的计算结果合理可靠，表明经二次开发后ABAQUS可用于土石坝的静、动力分析，从而可利用ABAQUS前后处理方便、计算精度高和模拟复杂问题能力强的优点，为土石坝分析提供一种可供选择的手段。

Secondary development of ABAQUS and its application to static and dynamic analyses of earth-rockfill dam

On the basis of subroutine UMAT provided by ABAQUS，the Duncan nonlinear elastic model for static analysis and the equivalent linear model for dynamic analysis are implemented; so the database of constitutive model in ABAQUS is enlarged. The methods to model layered construction of dam, correct the displacement of new fill layer, consider the effect of wetting effect, evaluate liquefaction resistance of dam material and compute the permanent displacement induced by earthquake are described in detail. The results of examples are found to be reasonable and reliable, it verifies that ABAQUS can be used in static and dynamic analyses of earth-rockfill dam after the secondary development. The present method can make use of the advantages of ABAQUS, such as convenient preprocessor and postprocessor, high solution precision and high ability to handle complex problems; so an alternative method for static and dynamic analyses of earth-rockfill dam is provided.