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(中國建筑西北設(shè)計(jì)研究院有限公司, 西安 710018)

摘要: 渭南市中心西片區(qū)檔案館位于高烈度區(qū),主要功能為密集柜書庫,存在最大層間位移角不滿足規(guī)范要求以及框架梁柱配筋過大的問題。 采用混合減震技術(shù),設(shè)置屈曲約束支撐和黏滯阻尼器以提供抗側(cè)剛度,減小地震作用,使最大層間位移角滿足了規(guī)范要求,并有效減小框架梁柱配筋。 對(duì)混合減震結(jié)構(gòu)進(jìn)行了多遇地震、設(shè)防地震和罕遇地震作用下的時(shí)程分析,結(jié)果表明:多遇地震作用下,混合減震技術(shù)使主體結(jié)構(gòu)最大層間位移角減小了 28%,基底剪力減小了 5%,典型柱配筋減少了約 40%,減震效果明顯;設(shè)防地震作用下,結(jié)構(gòu)最大層間位移角小于 1 / 250,性能水準(zhǔn)基本處于輕微損傷階段;罕遇地震作用下,結(jié)構(gòu)彈塑性最大層間位移角為 1 / 96, 性能水準(zhǔn)處于中等損壞 ~重度損壞之間,沒有構(gòu)件發(fā)生嚴(yán)重?fù)p壞,說明屈曲約束支撐與黏滯阻尼器的共同耗能有效改善了主體結(jié)構(gòu)的塑性損傷,減震效果良好。

關(guān)鍵詞: 屈曲約束支撐; 黏滯阻尼器; 混合減震技術(shù); 塑性損傷

中圖分類號(hào):TU398. 7 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2022)11-0105-06

DOI:10. 19701 / j. jzjg. XBY2202

Analysis of mix-dissipation design in Weinan Central West District Archives

ZOU Shengli, WANG Hongqun, TANG Xuyang, XIN Li, TANG Yuyun

(China Northwest Building Design and Research Institute Co. , Ltd. , Xi’ an 710018, China)

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