钢框架建筑基于减震技术的地震韧性提升  

The seismic resilience improvement of stee1l frame buildingg based on damping technology

作　　者：张学智[1] 王心宇 Zhang Xuezhi;Wang Xinyu(Office of Logistics&Infrastructure,Beijing Institute of Technology,Bejing 100081,China;Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China)

机构地区：[1]北京理工大学后勤基建处,北京100081 [2]中国地震局工程力学研究所,中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080

出　　处：《建筑科学》2024年第5期167-175,共9页Building Science

摘　　要：近年来钢结构建筑高速发展并得到广泛应用,提升现有钢框架结构的抗震韧性至关重要。为此,以一栋9层钢框架建筑作为原型案例,分别采用黏滞阻尼器和屈曲约束支撑设计了两种减震加固方案。采用有限元软件Perform-3D对原型案例和两种加固方案进行弹塑性时程分析,并根据《建筑抗震韧性评价标准》对3个结构进行了韧性评价。通过对比3个结构地震响应和抗震韧性,结果表明:在地震响应方面,黏滞阻尼器减震方案在设防地震下具有相对优势,屈曲约束支撑减震方案则在罕遇地震下具有更好的减震效果。在抗震韧性方面,黏滞阻尼器减震案例在设防地震下的具有较好的抗震韧性水平,屈曲约束支撑减震案例则在罕遇地震下具有更优的抗震韧性水平。传统抗震结构的抗震韧性等级为零星,通过进行减震加固可将建筑的抗震韧性等级从零星提升至一星,有效提升建筑的抗震韧性。本文的研究成果可为高烈度区钢结构建筑的抗震韧性设计提供参考。In recent years,steel structure buildings have developed rapidly and been widely applied,making it crucial to enhance the seismic resilience of existing steel frame structures.To address this,a nine-story steel frame building is adopted as a prototype case,and two seismic retrofitting schemes are designed using viscous dampers and buckling-restrained braces.Nonlinear time-history analysis of the prototype case and the two retroftted buildings are conducted using the finite element software Perform-3D.Based on the Standard for seismic resilience assessment of buildings,the resilience of the three structures is evaluated.By comparing the seismic responses and seismic resilience of the three structures,the results showed that the viscous damper retrofiting scheme has a relative advantage under design-basis earthquakes,while the buckling-restrained brace retrofiting scheme demonstrated better seismic reduction effects under rare earthquakes.In terms of seismic resilience,the viscous damper retrofitting case exhibites a good level of seismic resilience under design-basis earthquakes,whereas the buckling-restrained brace retrofitting case shows superior seismic resilience under rare earthquakes.The seismic resilience level of traditional seismic structures is Level O,but through seismic retrofitting,the resilience level of buildings can be effectively improved from Level O to Level 1,significantly enhancing the seismic resilience of the buildings.The research results of this paper can provide a reference for the seismic resilience design of steel structure buildings in high seismic intensity areas.

关 键 词：钢框架建筑 屈曲约束支撑 黏滞阻尼器 地震响应 抗震韧性 

分 类 号：TU375.4[建筑科学—结构工程]