- 摘 要
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(1 北京建筑大學工程結構與新材料北京市高等學校工程研究中心, 北京 100044;2 北京建筑大學大型多功能振動臺陣實驗室, 北京 100044)
摘要: 為解決大震后傳統(tǒng)防屈曲支撐-框架結構殘余位移較大和修復難度大、成本高等問題,基于抗震韌性的思想,對傳統(tǒng)防屈曲支撐-框架結構進行優(yōu)化設計,提出功能可恢復防屈曲支撐-框架結構體系的設計方法,提升建筑的抗震能力和震后可修復性. 以實際工程為例,采用傳統(tǒng)防屈曲支撐-框架結構和基于抗震韌性的功能可恢復防屈曲支撐-框架結構對其進行抗震設計,對比分析了兩種方案的結構抗震性能和抗倒塌易損性. 結果表明:大震下傳統(tǒng)防屈曲支撐-框架結構最大殘余位移角為 1/ 15,超過《建筑抗震韌性評價標準》(GB/ T 38591—2020)中建議的可修復范圍限值1/ 200;功能可恢復防屈曲支撐-框架結構最大殘余位移角為 1/ 207,處于可修復范圍,且倒塌概率遠低于 10%,具有良好的抗倒塌能力. 功能可恢復防屈曲支撐-框架結構體系對于實現(xiàn)建筑震后快速修復或繼續(xù)使用具有良好的可行性.
關鍵詞: 框架結構; 防屈曲支撐; 功能可恢復; 抗震韌性; 殘余位移角; 易損性
中圖分類號:TU375 文獻標志碼:A 文章編號: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轉化-工程研究中心項目(PXM2015-014210-000002).
第一作者:徐成彪,碩士研究生,主要從事結構性能化設計研究,Email:1055818696@ qq. com.
[引用本文] 徐成彪,彭有開,吳徽. 基于抗震韌性的功能可恢復防屈曲支撐-框架結構設計方法研究[J]. 建筑結構,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.
