带可更换连梁的新型联肢剪力墙的设计与分析

Design and Analysis of Reinforced Concrete Coupled Shear Wall with Replaceable Coupling Beams

提出了一种新型可更换连梁,在连梁中部设置耗能部件,地震时塑形变形集中在耗能部件(可更换段),震后方便更换,非更换段在地震作用下不屈服.介绍了可更换连梁的设计方法,并对带有可更换连梁的新型联肢剪力墙和传统联肢剪力墙进行了时程分析和对比.分析结果表明:在小震作用下,可更换连梁没有屈服,对墙肢提供约束,在中震和大震作用下,可更换连梁屈服,其塑形变形集中在可更换段,非更换段保持弹性;与传统联肢剪力墙相比,新型联肢剪力墙的抗震性能显著改善.最后,提出了新型连梁变形与层间位移角的关系,为可更换段的设计提供依据.

In this study,a new kind of coupling beam is proposed,which is composed of non-replaceable part and replaceable part.During earthquakes,the replaceable parts yield first and the non-replaceable parts remain elastic.The design method of the new replaceable coupling beam is introduced.The numerical simulation and comparison analysis are carried out. The results show that under minor earthquakes,the replaceable parts remain elastic. Under moderate earthquakes and major earthquakes,the replaceable parts yield first and the damage of the new coupling beams concentrates on the replaceable part.Compared with the traditional reinforced concrete coupled shear wall,the seismic performance of the new coupled shear wall is improved significantly. Finally, the relationship between the deformation of the replaceable part and inter-story drift ratio is proposed,providing the basis for the design of the replaceable part.