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(中國(guó)建筑西北設(shè)計(jì)研究院有限公司,西安 710018)

摘要: 以 8 度區(qū)西安市疾病預(yù)防控制中心病毒實(shí)驗(yàn)樓為研究對(duì)象，分析了近斷層地震動(dòng)特性及其對(duì)隔震結(jié)構(gòu)的不利影響，確定了甲類建筑基礎(chǔ)隔震設(shè)計(jì)所需的地震動(dòng)參數(shù)和抗震性能目標(biāo)。對(duì)比了橡膠隔震支座、橡膠隔震支座+黏滯阻尼器、橡膠隔震支座+黏滯阻尼器+滑板隔震支座三種隔震層設(shè)計(jì)方案，研究了黏滯阻尼器和滑板隔震支座對(duì)隔震層的影響。表明黏滯阻尼器能夠有效控制隔震層在大震作用下的位移。根據(jù)分析結(jié)果選擇橡膠隔震支座+黏滯阻尼器+滑板隔震支座的隔震方案。上部結(jié)構(gòu)分別采用直接分析法和傳統(tǒng)水平向減震系數(shù)法相融合的設(shè)計(jì)方法進(jìn)行設(shè)計(jì)，通過(guò)樓層剪力對(duì)比驗(yàn)證該方法的合理性。采用 PERFORM 3D 軟件對(duì)隔震結(jié)構(gòu)進(jìn)行了大震作用下的抗震性能評(píng)估，結(jié)果表明結(jié)構(gòu)完全滿足罕遇地震可修、極罕遇地震不倒的性能目標(biāo)。

關(guān)鍵詞: 8 度區(qū)； 近斷層； 甲類建筑； 基礎(chǔ)隔震； 黏滯阻尼器； 隔震結(jié)構(gòu)； 振型分解反應(yīng)譜法； 彈塑性分析

中圖分類號(hào):TU352.12 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2022)19-0124-08

DOI:10.19701 / j.jzjg.LS210269

Base isolation analysis and design of a class A building near fault in 8 degree area

XIN Li,YANG Qi,DUAN Chenggang,JING Gang,SHI Shengzhi

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

Abstract: The characteristics of near-fault ground motions and their adverse effects on isolated structures were analyzed bytaking a virus laboratory building of the Xi’an Center for Disease Control and Prevention in 8 degree area as the researchobject. The ground motions parameters and seismic performance objectives for the base-isolated design of the class Abuildings were also determined. The three seismic isolation interface design schemes were discussed including rubberseismic isolator,rubber seismic isolator + viscous damper,rubber seismic isolator + viscous damper + sliding plate seismicisolator,and the influence of viscous dampers and sliding plate seismic isolators on the seismic isolation interface wasresearched. The results show that the viscous dampers can effectively decrease the displacement of the seismic isolationinterface under rare earthquake. According to the analysis results,the scheme of rubber seismic isolator + viscous dampers +sliding plate seismic isolator was adopted. The combination of direct analysis method and traditional horizontal dampingcoefficient method was adopted for the design of the upper structure. The rationality of this method was verified bycomparing the inter-story shear force of floor. The seismic performance of the isolated structure was evaluated using thePERFORM 3D software. The results that the structures fully satisfy repairable under rare earthquake and no collapse duringvery rare earthquake.

Keywords:8 degree area； near-fault； class A building； base isolation； viscous damper； seismic isolation structure； moderesponse spectrum method； elastoplastic analysis

第一作者:辛力，博士，教授級(jí)高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，主要從事工程抗震研究，Email: xinli1129@ sina. com。

[引用本文] 辛力，楊琦，段成剛，等. 某 8 度區(qū)近斷層甲類建筑基礎(chǔ)隔震分析與設(shè)計(jì)[ J]. 建筑結(jié)構(gòu)，2022，52(19):124-131. XIN Li，YANG Qi，DUAN Chenggang，et al. Base isolation analysis and design of a class A building nearfault in 8 degree area[J]. Building Structure，2022，52(19):124-131.