基于拟力法的剪力墙结构力学模型研究初探

Exploration of mechanical model for shear walls based on force analogy method

剪力墙局部变形机制与整体变形之间的关系是建立基于拟力法的剪力墙结构理论模型的关键环节之一。拟力法以位移变化替代以往通过刚度变化求解非线性的思想,减少了刚度的存储空间,提高了求解效率和稳定性,为结构的非线性动力反应分析提供了理想的途径。首先简要介绍了拟力法的基本理论,论述了建立基于拟力法的剪力墙结构力学模型的核心思想;其次,系统总结了剪力墙分析的两大类方法、剪力墙的破坏形态、破坏机理及其骨架曲线确定方法的研究现状;最后,对基于拟力法的剪力墙结构力学模型的研究提出了建议及展望,这是对剪力墙分析的新的探索,也是对拟力法理论体系的补充和完善。

The relationship between local deformation mechanism and the whole deformation mechanism of shear walls is one of the key points to establish theoretical structural model of shear wall based on the FAM （ force analogy method） method. FAM is an inelastic analysis method based on changing the structural displacement field instead of changing structural stiffness in the traditional method. In this way, it can save storage space of stiffness, improve the solving efficiency and stability, and offer an excellent way for the nonlinear dynamic analysis of structures. Firstly, the fundamental theory of FAM was introduced and the core thinking for the establishment of mechanical model based on FAM was discussed. Then, the development process of two kinds of method used for shear wall a- nalysis, as well as the failure modes, the failure mechanism and the determing method of skeleton curve of the shear walls were reviewed and summarized. Finally, reasonable suggestions and prospects are put forward for the exploration of mechanical model of shear walls based on force analogy method, which will be a new development for shear wall analysis and a supplement of the FAM theory.