基于统一强度理论的生态复合墙结构ABAQUS二次开发平台建设

SECOND DEVELOPED ABAQUS OF ECOLOGICAL COMPOSITE WALL STRUCTURE BASED ON UNIFIED STRENGTH THEORY

生态复合墙体在受荷过程中始终处于复杂应力状态,且使用的墙体内填材料具有多样性,使用单一的一种本构模型不能很好地反映其内填各种材料的受力情况,利用非线性有限元软件ABAQUS提供的二次开发功能,将适用于任何一种材料的统一强度理论本构模型编入ABAQUS中,完成了对生态复合墙结构体系的有限元数值分析。结果表明:在ABAQUS中增加统一强度理论本构模型,丰富了材料单元库,提高了计算精度和效率,而且,通过算例验证,说明该子程序不仅可以充分地利用该软件强大的非线性求解平台,而且还可以完成复杂的生态复合墙结构的有限元数值分析问题,对于实际工程,具有一定的准确性、经济性与适用性。

Ecological composite wall structure is always in complex stress state in the loading process, and using wall inner filling material has diversity. The use of a single kind of compound material model can＇ t reflect well the stress of the filled various materials. By using the second developed function of the nonlinear finite element software ABAQUS, the twin shear unified strength theory compound model applicable to any kind of material is embedded into the software, and the nonlinear analysis is carried out for ecological composite wall structure. The results show that when the twin shear unified strength theory compound model is added to ABAQUS, material cell library is enriched, thus improving the computational accuracy and efficiency. Through the example, the UMAT（ user-defined material mechanical behavior） can not only make full use of the powerful nonlinear solution platform of the software ABAQUS, but also can do complex finite element numerical analysis for ecological composite wall structure, with some accuracy, economy and applicability in practical engineering