钢筋混凝土框架结构弹塑性数值子结构分析方法

发布时间：2018-02-17 04:40

本文关键词： 数值子结构方法局部非线性弹塑性非线性分析 CS技术　出处：《工程力学》2016年05期 　论文类型：期刊论文

【摘要】：大型复杂土木工程结构在地震作用下失效破坏可能由部分关键构件严重损伤破坏导致,而大部分构件仍处于弹性或小变形状态。该类结构的地震损伤和破坏全过程分析涉及超大规模系统强非线性动力分析,目前尚缺乏能很好兼顾效率和精度的计算理论,基于此,该文提出一种新型高效且实用的弹塑性数值子结构理论和计算方法,将大型复杂结构系统的大规模非线性计算问题转化为整体结构适度规模的线弹性分析和数量与规模均较小的局部隔离子结构非线性分析,其中,线弹性整体结构刚度矩阵的集成及LU三角分解仅需进行一次,大大提高计算效率;少数屈服构件的子结构非线性分析采用精细化有限元模型或不同类型单元模型,精确模拟构件局部损伤破坏机理,有效提高结构整体的计算精度。最后通过对一榀平面钢筋混凝土框架结构进行地震动力弹塑性数值子结构方法分析,验证其高效性与精确性。
[Abstract]:Large and complex civil engineering structure failure may be a key component part of serious damage caused in the earthquake, and most of its members are still in elastic or small deformation state. The earthquake damage and failure analysis of the whole process involves the analysis of strong nonlinear dynamic system of the large scale structure, there is a lack of good balance theory, efficiency and the accuracy based on this, this paper proposes a new efficient and practical elastic-plastic numerical substructure theory and calculation method, the nonlinear large-scale complex structure system is computed by solving nonlinear analysis, local substructure isolation structure of moderate scale of linear elastic analysis and the number and size are smaller in stiffness the overall structure of the integrated linear elastic matrix and LU triangle decomposition is performed only once, greatly improve the computational efficiency; a sub structure yield component non line Analysis of the refined finite element model or different types of unit model, accurate simulation of local damage component failure mechanism, effectively improve the calculation accuracy of the whole structure. Finally, through the analysis of seismic dynamic elastoplastic numerical substructure method of a plane reinforced concrete frame structure, verify its efficiency and accuracy.

【作者单位】：大连理工大学建设工程学部;厦门大学建筑与土木学院;哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51261120376;91315301-12)
【分类号】：TU375.4;TU311.3

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