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(1 四川省建筑設(shè)計(jì)研究院有限公司, 成都 610095;2 四川省建筑設(shè)計(jì)研究院有限公司復(fù)雜結(jié)構(gòu)設(shè)計(jì)研究中心, 成都 610095)

摘要: 為研究隔震技術(shù)加固砌體結(jié)構(gòu)房屋的可行性及適用性,以一棟層數(shù)和高度均超限的既有多層砌體結(jié)構(gòu)教學(xué)樓為對(duì)象,詳細(xì)介紹隔震加固設(shè)計(jì)全過程,并利用軟件 ETABS 對(duì)隔震加固后的結(jié)構(gòu)進(jìn)行分析. 結(jié)果表明,隔震加固后,砌體結(jié)構(gòu)的自振周期明顯延長,地震響應(yīng)顯著降低;變形集中于隔震層,隔震層以上結(jié)構(gòu)層間位移角在設(shè)防地震作用下遠(yuǎn)小于 2 倍彈性層間位移角限值,在罕遇地震作用下遠(yuǎn)小于 4 倍彈性層間位移角限值,滿足了預(yù)定的抗震性能目標(biāo);隔震支座的水平位移和拉/ 壓應(yīng)力也遠(yuǎn)小于規(guī)范限值. 隔震層以上結(jié)構(gòu) X、Y 向減震系數(shù)最大值分別為 0. 301和 0. 379,均小于 0. 4,結(jié)構(gòu)構(gòu)造措施可按比設(shè)防烈度降低一度確定,解決了結(jié)構(gòu)層數(shù)和高度超限問題.

關(guān)鍵詞: 砌體結(jié)構(gòu); 既有建筑; 檢測鑒定; 隔震加固; 橡膠支座

中圖分類號(hào):TU362 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)07-0018-06

DOI:10. 19701 / j. jzjg. SADI2310

Seismic isolation strengthening design of existing multi-story masonry structure teaching building

ZHOU Qiaoling1,2, ZHAO Shixing1,2, PENG Min1,2, WU Fei1, TANG Yuanxu1, YANG Shuheng1,2

(1 Sichuan Provincial Architectural Design and Research Institute Co. , Ltd. , Chengdu 610095, China;2 Complex Structure Design and Research Center, Sichuan Provincial Architectural Design andResearch Institute Co. , Ltd. , Chengdu 610095, China)

Abstract: In order to study the feasibility and application of seismic isolation technology in masonry building strengthening,an existing multi-story masonry teaching building with out-of-limit floors and height was taken as the research object. Thewhole process of seismic isolation strengthening design was introduced in detail, and the finite element software ETABS wasused to analyze the structure strengthened by the seismic isolation technology. The results show that after seismic isolationstrengthening, the natural period of the masonry structure is significantly prolonged, and the seismic response issignificantly reduced. The deformation is concentrated on the isolation layer. The inter-story drift ratio of the structureabove the isolation layer is far less than the limit value of 2 times the elastic inter-story displacement ratio under fortificationearthquake, and far less than the limit value of 4 times the elastic inter-story displacement ratio under rare earthquake,meeting the predetermined seismic performance target. The horizontal displacement and tensile / compressive stress of theisolation bearing are also far less than the limit value of the code. The maximum damping coefficients of the structure abovethe isolation layer in X and Y directions are 0. 301 and 0. 379, respectively, both of which are lower than 0. 4. Theconstructional measures can be determined by reducing the specific fortification intensity by one degree, which solves theproblem of out of the limitation of floors and height.

Keywords:masonry structure; existing building; test appraisal; seismic isolation strengthening; rubber bearing

∗2021 年度四川省住房城鄉(xiāng)建設(shè)領(lǐng)域科技創(chuàng)新課題 ( SCJSKJ2021-24), 四川省建筑設(shè)計(jì)研究院有限公司科 研 項(xiàng) 目(KYYN202111).

第一作者:周巧玲,博士,工程師,主要從事鋼結(jié)構(gòu)和組合結(jié)構(gòu)設(shè)計(jì)及研究,Email: zhouqiaoling94@ 163. com.

[引用本文] 周巧玲,趙仕興,彭敏,等. 既有多層砌體結(jié)構(gòu)教學(xué)樓隔震加固設(shè)計(jì)[J]. 建筑結(jié)構(gòu),2023,53(7):18-23,49. ZHOU Qiaoling,ZHAO Shixing,PENG Min,et al. Seismic isolation strengthening design of existing multi-storymasonry structure teaching building[J]. Building Structure,2023,53(7):18-23,49.