基于有限元数值分析的木结构抗震性能分析及其在建筑中的应用

Seismic Behavior Analysis of Timber Structures Based on Finite Element Numerical Analysis and Its Application in Buildings

为了提高木结构抗震性能分析的精度,采用多尺度建模分析方法对木结构进行抗震分析。利用多点约束方法分别将榫卯节点和梁柱构件设定为关键区域和非关键区域。采用多尺度的建模思想,对关键区域采用实体单元进行精细尺度建模,而非关键区域则采用梁单元进行普通尺度建模,再通过不同尺度实现宏观结构模型和局部微观模型的相互协调,比较不同尺度下的实体单元和梁单元建模在抗震中的性能。实验结果表明,多尺度的有限元数值分析能够模拟木结构的整体动力响应和精确分析边界条件。通过多尺度、大范围的分级建模能够构建局部和全局的抗震性能分析的过程,精度较高,可提升抗震分析的效率。

To improve the accuracy of seismic performance analysis of wooden structures, a multi-scale modeling analysis method was used in this paper. By using the multi-point constraint method, the mortise-tenon joints and beam-column members were set as the critical and non-critical regions, respectively. Based on the idea of multi-scale modeling, solid elements were adopted for fine-scale modeling in key areas, while beam elements were used for ordinary-scale modeling in non-critical areas. The coordination of macro-structure model and local micro-model could then be realized on different scales, and the seismic performances of solid elements and beam elements in modeling under different scales were compared. The experimental results showed that the multi-scale finite element numerical analysis can simulate the overall dynamic response of wooden structures and accurately analyze the boundary conditions. Through multi-scale and large-scale hierarchical modeling, local and global seismic performance analyses can be conducted, which are highly accurate and can improve the efficiency of seismic analysis.