(1 北京建筑大学工程结构与新材料北京市高等学校工程研究中心, 北京 100044;2 北京建筑大学大型多功能振动台阵实验室, 北京 100044)

摘要: 为解决大震后传统防屈曲支撑-框架结构残余位移较大和修复难度大、成本高等问题,基于抗震韧性的思想,对传统防屈曲支撑-框架结构进行优化设计,提出功能可恢复防屈曲支撑-框架结构体系的设计方法,提升建筑的抗震能力和震后可修复性. 以实际工程为例,采用传统防屈曲支撑-框架结构和基于抗震韧性的功能可恢复防屈曲支撑-框架结构对其进行抗震设计,对比分析了两种方案的结构抗震性能和抗倒塌易损性. 结果表明:大震下传统防屈曲支撑-框架结构最大残余位移角为 1/ 15,超过《建筑抗震韧性评价标准》(GB/ T 38591—2020)中建议的可修复范围限值1/ 200;功能可恢复防屈曲支撑-框架结构最大残余位移角为 1/ 207,处于可修复范围,且倒塌概率远低于 10%,具有良好的抗倒塌能力. 功能可恢复防屈曲支撑-框架结构体系对于实现建筑震后快速修复或继续使用具有良好的可行性.

关键词: 框架结构; 防屈曲支撑; 功能可恢复; 抗震韧性; 残余位移角; 易损性

中图分类号:TU375 文献标志码:A 文章编号:1002-848X(2023)03-0027-07

DOI:10. 19701 / j. jzjg. ZJ210092

Research on design method of function resilient buckling restrained brace-frame structure based on seismic resilience

XU Chengbiao1,2, PENG Youkai1,2, WU Hui1,2

(1 Beijing Higher Institution Engineering Research Center of Civil Engineering Structure and Renewable Material,Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 2 Multi-Functional ShakingTables Laboratory, Beijing University of Civil Engineering and Architecture, Beijing 100044, China)

Abstract: In order to solve the problem that traditional buckling restrained brace-frame structure often undergoes largeresidual drift after rare earthquake and it is difficult or costly to be repaired, the design method of function resilient bucklingrestrained-brace frame structure system is put forward based on the philosophy of seismic resilience, which aims atoptimizing the traditional buckling restrained brace-frame structure and improving the seismic capacity and post-earthquakerepairability of buildings. Taking the practical project as an example, the traditional buckling restrained brace-framestructure and the function resilient buckling restrained brace-frame structure based on seismic resilience were used to carryout the seismic design, the seismic performance and collapse fragility of the two schemes were compared and analyzed. Theresults show that the maximum residual drift ratio of traditional buckling restrained brace-frame structure reaches 1 / 15under rare earthquakes, which is far exceeding the repairable limit 1 / 200 recommended in Standard for seismic resilienceassessment of buildings (GB/ T 38591—2020). The maximum residual drift ratio of function resilient buckling restrainedbrace frame structure is 1 / 207 which is in the repairable range, and the collapse probability is far less than 10% indicatinggood collapse resistance. It is proved that the function resilient buckling restrained brace-frame structure system has goodfeasibility for post-earthquake repair and reuse.

Keywords:frame structure; buckling restrained brace; function resilient;seismic resilience; residual drift ratio; fragility

∗北京市教委科技成果转化-工程研究中心项目(PXM2015-014210-000002).

第一作者:徐成彪,硕士研究生,主要从事结构性能化设计研究,Email:1055818696@ qq. com.

[引用本文] 徐成彪,彭有开,吴徽. 基于抗震韧性的功能可恢复防屈曲支撑-框架结构设计方法研究[J]. 建筑结构,2023,53(3):27-33. XU Chengbiao,PENG Youkai,WU Hui. Research on design method of function resilient bucklingrestrained brace-frame structure based on seismic resilience [J]. Building Structure,2023,53(3):27-33.