基于ABAQUS显式分析的梁单元材料模型开发应用  

DEVELOPEMENT AND APPLICAYION OF MATERIAL CONSTITUTIVE MODELS BASED ON ABAQUS/EXPLICIT BEAM ELEMENTS

作　　者：雷拓[1] 刘伯权[1] 刘锋 

机构地区：[1]长安大学建筑工程学院,西安710061 [2]山东科技大学土木建筑学院,青岛266510

出　　处：《工程力学》2013年第6期259-268,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(51078037);教育部高校博士点基金项目(20100205110010)

摘　　要：简要回顾了目前钢筋、混凝土单轴本构关系的研究现状。在前人基础上,重新定义了钢筋、混凝土的本构模型。该模型可考虑反复荷载下钢筋的Bauschinger效应及刚度退化,混凝土任意反复荷载下的强度及刚度退化。讨论了适用于ABAQUS/Explicit分析的钢筋混凝土梁单元建模方法及求解静力、动力问题的注意事项。按照VUMAT接口格式,采用FORTRAN语言编制了纤维模型梁单元的钢筋、混凝土材料用户子程序。通过与拟静力试验及足尺振动台试验结果对比,验证了程序及建模方法的可靠性。结果表明:编制的材料子程序可广泛用于复杂结构中弯曲破坏为特征的普通及高强混凝土梁、柱等构件的精细化模拟。The current status of steel and concrete uniaxial constitutive models was reviewed briefly. Based on the former research, constitutive models of steel and concrete were presented, which can consider the Bauschinger effect and stiffness degradation of steel, the strength and stiffness degradation of concrete under arbitrarily cyclic loading. Also, modeling methods of reinforced concrete beam elements and some measures using an explicit method for static and dynamic analyses were discussed at length. According to the demand of ABAQUS/Explicit package＇s VUMAT pattern, a user subroutine for fiber beam elements written in FORTRAN language was developed. By means of the comparison with the pseudo-static test and full scale shaking table test results, the reliability of user subroutine, also, modeling methods were validated. The results show that the user subroutine proposed here are applicable to refined the simulation of normal- and high-strength concrete beams ＆columns or other components characterized by flexural failure in complex large-scale structures widely.

关 键 词：钢筋混凝土 本构模型 VUMAT 梁单元 试验验证 

分 类 号：TU311[建筑科学—结构工程]