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工程力学  2012 

考虑扭转作用的钢管混凝土纤维梁模型

DOI: 10.6052/j.issn.1000-4750.2010.12.0955, PP. 82-90

Keywords: 钢管混凝土,纤维梁单元,非线性分析,扭转,应力空间,应变空间

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Abstract:

通过引入纤维梁截面的正应变平截面假定和剪应变线性分布假定,根据美国学者Hsu提出的转角软化桁架模型中的混凝土材料二维本构关系,从基本的材料力学原理出发,推导了可考虑扭转作用的钢管混凝土纤维梁单元的本构关系求解流程。基于大型通用有限元程序ABAQUS提供的用户自定义子程序UEL,采用FORTRAN语言开发了可考虑扭转作用的钢管混凝土纤维梁模型,能够模拟钢管混凝土柱在轴力-弯矩-扭矩复合受力下的全过程力学行为,并可考虑任意加载路径。该文所开发的纤维梁模型具有较高的精度和求解效率。

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