渭南市中心西片区档案馆混合减震设计分析
摘要:渭南市中心西片区档案馆位于高烈度区,主要功能为密集柜书库,存在最大层间位移角不满足规范要求以及框架梁柱配筋过大的问题。采用混合减震技术,设置屈曲约束支撑和黏滞阻尼器以提供抗侧刚度,减小地震作用,使最大层间位移角满足了规范要求,并有效减小框架梁柱配筋。对混合减震结构进行了多遇地震、设防地震和罕遇地震作用下的时程分析,结果表明:多遇地震作用下,混合减震技术使主体结构最大层间位移角减小了28%,基底剪力减小了5%,典型柱配筋减少了约40%,减震效果明显;设防地震作用下,结构最大层间位移角小于1/250,性能水准基本处于轻微损伤阶段;罕遇地震作用下,结构弹塑性最大层间位移角为1/96,性能水准处于中等损坏~重度损坏之间,没有构件发生严重损坏,说明屈曲约束支撑与黏滞阻尼器的共同耗能有效改善了主体结构的塑性损伤,减震效果良好。
关键词:屈曲约束支撑;黏滞阻尼器;混合减震技术;塑性损伤
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[2] 陈焰周,申涛,李霆,等.昆明国家开发银行大楼混合减震分析[J].工程抗震与加固改造,2017,39(4):18-25.
[3] 侯习胶,沙鸥,王纪伟,等.屈曲约束支撑与黏滞阻尼器联合在某医院业务用房减震效果的应用研究[J].建筑结构,2018,48(S1):358-361.
[4] 黄文成,张永山,郭镪文,等.某偏心框架混合减震结构弹性与弹塑性动力时程分析[J].工程抗震与加固改造,2017,39(4):11-17,54.
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[6] 刘博.混合减震技术在医疗建筑中的应用研究[J].建筑结构,2020,50(S2):305-311.
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[8] 杨溥,姬淑艳,肖志,等.粘滞阻尼器加固的某RC框架结构抗震性能分析及优化设计[J].重庆大学学报,2007,30(8):114-118.
[9] 耿耀明.钢框架-支撑结构混合减震分析与设计[J].结构工程师,2020,36(6):225-231.
[10] 建筑消能减震技术规程:JGJ 297—2013 [S].北京:中国建筑工业出版社,2013.
[2] 陈焰周,申涛,李霆,等.昆明国家开发银行大楼混合减震分析[J].工程抗震与加固改造,2017,39(4):18-25.
[3] 侯习胶,沙鸥,王纪伟,等.屈曲约束支撑与黏滞阻尼器联合在某医院业务用房减震效果的应用研究[J].建筑结构,2018,48(S1):358-361.
[4] 黄文成,张永山,郭镪文,等.某偏心框架混合减震结构弹性与弹塑性动力时程分析[J].工程抗震与加固改造,2017,39(4):11-17,54.
[5] 段绍伟,毛轴,陈敏,等.L形偏心框架结构混合减震分析[J].广西大学学报(自然科学版),2015,40(1):28-35.
[6] 刘博.混合减震技术在医疗建筑中的应用研究[J].建筑结构,2020,50(S2):305-311.
[7] 黄健,潘文.混合控制消能减震在某框架结构中的应用[J].中国水运,2018,18(12):216-218.
[8] 杨溥,姬淑艳,肖志,等.粘滞阻尼器加固的某RC框架结构抗震性能分析及优化设计[J].重庆大学学报,2007,30(8):114-118.
[9] 耿耀明.钢框架-支撑结构混合减震分析与设计[J].结构工程师,2020,36(6):225-231.
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Analysis of mix-dissipation design in Weinan Central West District Archives
Abstract: Weinan Central West District Archives main function is a dense cabinet library which located in a high-intensity area. There are problems that the maximum story displacement does not meet the specification requirements and the reinforcement of frame beams and columns is too large. Mix-dissipation technology was adopted, buckling-restrained braces(BRB) and viscous fluid dampers(VFD) were set to provide lateral stiffness and reduce seismic action in order to make the maximum story displacement meet the specification requirements and effectively reduce the reinforcement of frame beams and columns. The seismic time history analysis under the frequent earthquake, fortification earthquake and rare earthquake of mix-dissipation structure was carried out. The results show that: under frequent earthquake, maximum story displacement has reduced 28% and the bottom shear force has reduced 5%, typical column reinforcement has reduced 40%; under fortification earthquake, the maximum story displacement is less than 1/250, the seismic performance level is basically in the stage of slight damage; under rare earthquake, the maximum elastic-plastic story displacement is 1/96, the seismic performance level is between medium damage and serious damage, and no member is seriously damaged. It shows that the joint energy dissipation of BRB and VFD can reduce the plastic damage of the main structure effectively, and the damping effect is good.
Keywords: buckling-restrained brace; viscous fluid damper; mix-dissipation technology; plastic damage
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