摘要
结合已有的CFST(concrete-filled steel tuber)本构模型,对已做试验的两个CFST(单圆管)单肋拱空间极限承载状态进行了双重非线性有限元分析探讨。采用双单元法和单单元法对比研究了基于ANSYS分析下模型拱的统一理论模型、分离式理论模型和纤维单元模型.较好地模拟了模型拱的极限承栽状态,评定了几种核心混凝土本构模型的适应性,提出了ANSYS分析下精确模拟CFST拱极限承栽状态的基本原理、基本方法和本构关系的选取建议。计算结果与试验结果符合较好,验证了本文计算模型的合理性。研究成果可供进行圆CFST拱计算时参考。
Combining with the existing CFST constitutive model, this paper analyzed and discussed the spatial ultimate load-carrying state of two tested CFST（single tube）arches with one rib by dual nonlinear finite element analysis, simulated the ultimate load-carrying state of model arches by a comparative study on model arches with unified theory, separate theory and fiber element theory, which based on ANSYS analysis with odd and even element methods, evaluated several preferable core concrete＇s constitutive relations, then proposed the suggestion for selection of the basic theories, basic methods and constitutive relations for ANSYS precise simulation of CFST arches. The results fit well with the test results, which justified this model and could provide guidance for calculation of CFST arches with circular hollow section.
出处
《重庆建筑》
2008年第8期29-33,共5页
Chongqing Architecture
基金
西部交通建设科技项目(2004 318 814 26)基金资助
