基于基本振型分析的低矮对称剪力墙类型判别

Type identification of the short symmetric shear wall based on the basic modal analysis

剪力墙类型的确定是进行其结构设计的重要依据,如何准确和直观地对低矮开洞剪力墙给出整体拟或双肢的界定,对指导其抗震设计具有重要意义。在正交理论的基础上,推导出了开洞剪力墙变形分解法,实现了对开洞剪力墙基本振型的量化分析,并可直接应用于低矮剪力墙的类型判别。通过与传统的整体系数判别法的对比分析,发现整体系数法将部分整体系数小于10的低矮整体剪力墙识别为了低矮双肢剪力墙,故在这类剪力墙的构造设计中,应对连梁的延性储备给予足够的考虑。

The type identification of a shear wall is an important basis for its structural design. How to accurately and visually identify the integrative or coupled feature of a short shear wall with openings is significant for guiding its seismic design. Based on the orthogonal theory, a method of deformation decomposition of shear wall with openings is deduced in this paper. Then the basis modal of the shear wall with opening can be quantitative analysis. And more it is applied to identify the type of the short shear wall with openings. According to the comparative anal- ysis with the traditional integrative coefficient method, it is found that some of the short integrative shear walls with the integrative coefficients less than 10.0 were considered as short coupled ones by means of the integrative coeffi- cient method. So in the constructive design of such kinds of short shear walls, the ductility reserves of the coupling beams should cause enough attention.