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[1]于 建,赵立财.近断层脉冲型地震动作用下BRB框剪结构减震性能设计研究[J].地震研究,2023,46(04):575-585.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0051]
　YU Jian,ZHAO Licai.Research on Damping Performance Design of BRB Frame-shear Structure by Near-fault Pulse-like Ground motions[J].Journal of Seismological Research,2023,46(04):575-585.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0051]
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近断层脉冲型地震动作用下BRB框剪结构减震性能设计研究(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
46
期数:
2023年04期
页码:
575-585
栏目:
出版日期:
2023-12-01

文章信息/Info

Title:
Research on Damping Performance Design of BRB Frame-shear Structure by Near-fault Pulse-like Ground motions
作者:
于 建1; 赵立财1; 2; 3
(1.中铁十九局集团 第五工程有限公司,辽宁 大连 116100; 2.中铁十九局集团 第三工程有限公司,辽宁 沈阳 110136; 3.台湾科技大学 营建工程系,中国台湾 台北 10672)
Author(s):
YU Jian1; ZHAO Licai1; 2; 3
(1.China Railway 19th Bureau Group Fifth Engineering Co.Ltd.,Dalian 116100,Liaoning,China)(2.China Railway 19th Bureau Group Third Engineering Co.Ltd.,Shenyang 110136,Liaoning,China)(3.Construction Engineering,Taiwan University of Science and Technology,Taipei 10672,Taiwan,China)
关键词:
脉冲型地震动;  框剪结构;  屈曲约束支撑;  减震性能
Keywords:
pulse-like ground motion;  frame-shear structure;  buckling restrained braces;  damping performance
分类号:
P315.925
DOI:
10.20015/j.cnki.ISSN1000-0666.2023.0051
摘要:
在脉冲型及非脉冲型地震动作用下,对典型框剪结构及6个屈曲约束支撑(BRB)减震结构进行弹塑性动力时程分析,主要基于层间位移角、结构损坏程度及结构耗能指标,对比分析不同BRB框剪结构的减震性能。结果表明:①由于抗侧刚度的提高,增设BRB能有效降低脉冲型地震动下框剪结构整体的层间位移角响应,使其满足规范限值要求,减震率最高达到52.1%; ②相比布置于外周,BRB布置于内框架能更有效减轻脉冲型地震动作用下结构上部楼层梁构件的严重损坏,从结构整体而言使梁构件严重损坏程度占比从71%降至45%以下,同时有效减轻了竖向构件的中度及严重损坏; ③相比非脉冲型地震动,脉冲型地震动削弱了减震结构中BRB的塑性耗能能力; ④BRB布置于内框架,且其初始刚度和屈服强度按更多楼层区域划分、屈服后刚度比取较小的减震方案的结构在脉冲型地震动下具有较高的减震性能。
Abstract:
Pulse-like ground motions exert extremely strong destructive force on building structures.The elastic-plastic dynamic time-history analysis of the typical frame-shear structure and several buckling restrained braces(BRB)shock-absorbing design structures subjected to the pulse-like and non-pulse-like ground motions is carried out.Based on the story drift ratio,the structural damage degree,and the structural energy consumption index,the seismic performance of different BRB frame-shear structures is compared and analyzed.The analysis shows that,due to the improvement of lateral stiffness,the added BRB can help to effectively reduce the story drift ratio response of the frame-shear structure subjected to the pulse-like ground motions,and make the structure meet the limit requirement in the Code.Instead of being arranged on the periphery,the BRB arranged in the inner frame of the shock-absorbing structure can help to reduce more effectively the serious damage to the upper-floor beam members of the structure subjected to the pulse-like ground motions,and reduce the proportion of the serious damage to the beam members from 71% to less than 45% as a whole,and effectively reduce the moderate- and serious-damage to the vertical members.Pulse-like ground motions can weaken the plastic energy-dissipation capacity of BRB in shock-absorbing structures while the non-pulse-like ground motions cannot.In general,when the structure is arranged with BRB in the inner frame,and the structure’s initial stiffness and yield strength are divided by more floor zones,the smaller post-yield stiffness ratio would show higher damping performance subjected to the pulse-like ground motions.

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备注/Memo

备注/Memo:
收稿日期:2022-09-03.
基金项目:辽宁省“兴辽英才计划”青年拔尖人才资助项目(XLYC2007146); 中铁十九局集团有限公司科技研究开发计划项目(2021-B03).
第一作者简介:于 建(1973-),高级工程师,主要从事房屋建筑结构稳定性研究.E-mail:383202550@qq.com.
通讯作者简介:赵立财(1985-),正高级工程师,博士,主要从事岩土介质与结构相互作用、结构减震控制与流体动力学研究.E-mail:zhaolicai1314@foxmail.com.
更新日期/Last Update: 2023-10-01