钢筋混凝土框架结构动力超自由度单元

Dynamic Super-Degree-of-Freedom Element of Reinforced Concrete Frame Structures

摘要: 钢筋混凝土框架结构的超自由度单元被拓展到钢筋混凝土框架结构的动力分析中，拓展的单元称之为动力超自由度单元。根据ABAQUS提供的UEL用户程序接口，动力超自由度单元被应用到ABAQUS动力分析中。通过一个三层三跨的钢筋混凝土框架结构在小震、中震和强震三种地震波作用下振动台试验结果的对比分析，本文开发的用户程序和动力超自由度单元的可靠性得到验证。结果表明程序能够很好地描述地震导致的钢筋混凝土框架结构强度和刚度的退化，说明本文开发的程序和动力超自由度单元可以广泛地用于钢筋混凝土框架结构的动力分析。

Abstract: The super-degree-of-freedom element, which is an element of beam-column joint of reinforced concrete frame structures, is developed to be suitable for dynamic analysis of reinforced concrete frame structures. The element is called dynamic-super-degree-of-freedom element. According to UEL interface provided by ABAQUS platform, the element is applied to ABAQUS dynamic analysis. By means of comparison with the results of a shaking table test of 3-story-3-bay reinforced concrete frame building under minor-moderate, moderate-severe and severe ground motions, reliabilities of the user subroutine and the element were validated. The results show that the subroutine can well reflect strength and stiffness degradation of reinforced concrete frame structures produced by earthquake loading. The subroutine and the element are widely applicable to refined dynamic simulation of concrete frame structures.