可更换构件结构抗震性能研究进展

Research progress on seismic behavior of structures with replaceable components

随着抗震韧性概念的提出,可恢复功能结构得到了广泛关注和应用,其中可更换构件结构将结构损伤集中于可更换耗能构件,有效保护主体结构,同时有益于震后更换损伤构件以实现结构功能的快速恢复。本文从可更换构件在剪力墙结构、筒体结构、框架结构及RCS混合结构(钢梁与钢筋混凝土柱组合框架结构)的应用中所用的设计方法及存在的优缺点等关键问题进行综述,得到以下结论:可更换构件主要应用在易发生塑性变形的部位,主要为连梁和柱脚部位,地震作用下可进一步设置耗能装置以有效保护主体结构不受破坏;可更换耗能构件易于更换,使结构在震后能够快速恢复使用功能;设置可更换构件结构的整体刚度会有所降低,但其设计方法较少,应进行进一步的探索和完善。

With the introduction of the concept of seismic toughness, recoverable functional structures have been widely concerned and applied. Among them, the replaceable component structure concentrates the structural damage on the replaceable energy-consuming components, effectively protects the main structure, and is beneficial to the replacement of damaged components after earthquake to realize the rapid recovery of structural function. In this paper, the design methods and existing advantages and disadvantages of replaceable components in the application of shear wall structure, cylinder structure, frame structure and RCS hybrid structure are summarized, and the following conclusions are drawn: The replaceable components are mainly used in the parts prone to plastic deformation, mainly the connecting beam and column foot parts. Under the action of earthquake, energy dissipation devices can be further set to effectively protect the main structure from damage. The replaceable energy-consuming components are easy to be replaced, so that the structure can quickly recover its use function after earthquake. The overall stiffness of the structure with replaceable components will be reduced, but there are few design methods, which should be further explored and improved.