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(1 上海建筑設(shè)計(jì)研究院有限公司, 上海 200041; 2 上海大學(xué)土木工程系, 上海 200444)

摘要: 上海某中學(xué)校史館為三層鋼結(jié)構(gòu),其地下一層為籃球場(chǎng),層高 9. 6m,結(jié)構(gòu)跨度 34. 8m,需考慮豎向地震作用下的結(jié)構(gòu)安全性和振動(dòng)舒適度. 介紹了校史館所采用的三維隔震技術(shù)方案及其水平、豎向響應(yīng)控制效果等關(guān)鍵技術(shù)問題. 在籃球場(chǎng)頂部與上部結(jié)構(gòu)之間設(shè)置隔震層,共布置 16 套三維隔震支座,結(jié)構(gòu)水平隔震周期 2. 679s,豎向隔震周期 1. 233s. 設(shè)防烈度地震作用下 X、Y 向的水平減震系數(shù)平均值分別為 0. 36、0. 33,罕遇地震作用下結(jié)構(gòu)最大層間位移角為 1 / 244,結(jié)構(gòu)仍處于彈性狀態(tài). 三向地震作用下,上部結(jié)構(gòu)的豎向加速度減震率可達(dá)到 35. 8%,罕遇地震下豎向支座的剪應(yīng)變均小于 250%限值. 通過三維隔震設(shè)計(jì)可顯著減小上部結(jié)構(gòu)的地震響應(yīng),實(shí)現(xiàn)結(jié)構(gòu)的性能化設(shè)計(jì).

關(guān)鍵詞: 鋼結(jié)構(gòu); 大跨結(jié)構(gòu); 三維隔震; 豎向地震; 性能化設(shè)計(jì)

中圖分類號(hào):TU398. 7 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)01-0059-06

DOI:10. 19701 / j. jzjg. SHY2316

Three-dimensional seismic isolation design and seismic analysis of a middle school in Shanghai

ZHANG Jian1, LIU Wenguang2, LI Menglu1, XU Hao2, CHEN Mufeng2

(1 Shanghai Institute of Architectural Design & Research Co. , Ltd. , Shanghai 200041, China;2 Department of Civil Engineering, Shanghai University, Shanghai 200444, China)

Abstract: The history hall of a middle school in Shanghai is a three-story steel structure. The first-floor underground is abasketball stadium with a height of 9. 6m and the structural span is 34. 8m. The structural safety and vibration comfortsubjected to the vertical earthquake should be considered. The three-dimensional seismic isolation technology schemeadopted for the history hall and its horizontal and vertical response control effects and other key technical issues wereintroduced. A seismic isolation layer was set between the top of the basketball stadium and the superstructure,consisting of16 three-dimensional isolators. The horizontal isolation period of the structure is 2. 679s and the vertical isolation period is1. 233s. Under the seismic action of the fortification intensity, the average values of the horizontal damping coefficients in Xand Y directions are 0. 36 and 0. 33 respectively, and the maximum interlayer displacement angle of the structure is 1 / 244under the action of rare earthquakes, and the structure is still in an elastic state. The vertical isolation effect of thesuperstructure can reach 35. 8% calculated by the acceleration under three-dimensional earthquake. And the shear strain ofthe vertical bearing is less than 250% subjected to the rare earthquake. Three-dimensional seismic isolation design cansignificantly reduce the seismic response of the superstructure and realize performance-based design of the structure.

Keywords: steel structure; large-span structure; there-dimensional isolation; vertical earthquake; performancebased design

∗國(guó)家自然科學(xué)基金(52078287),國(guó)家自然科學(xué)基金(52108461).

作者簡(jiǎn)介:張堅(jiān),學(xué)士,教授級(jí)高級(jí)工程師,一級(jí)注冊(cè)結(jié)構(gòu)工程師,英國(guó)特許工程師,主要從事工程抗震技術(shù)及復(fù)雜建筑結(jié)構(gòu)研究,Email:zhangjian@ isaarchitecture. com.

[引用本文] 張堅(jiān),劉文光,李夢(mèng)露,等. 上海某中學(xué)三維隔震設(shè)計(jì)與抗震分析[J]. 建筑結(jié)構(gòu),2023,53(1):59-64,134. ZHANG Jian,LIU Wenguang,LI Menglu,et al. Three-dimensional seismic isolation design and seismic analysis of amiddle school in Shanghai[J]. Building Structure,2023,53(1):59-64,134.