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(廣東省建筑設(shè)計(jì)研究院有限公司深圳分公司, 深圳 518063)

摘要: 某學(xué)校學(xué)院樓項(xiàng)目結(jié)構(gòu)高度為 23.5m,下部采用混凝土框架結(jié)構(gòu),上部有一大跨度鋼桁架結(jié)構(gòu)橫跨在兩端教學(xué)區(qū)結(jié)構(gòu)上. 研究了鉛芯橡膠支座、鉛芯橡膠支座+黏滯阻尼器、摩擦擺支座三種隔震方案,對(duì)各方案均進(jìn)行了相關(guān)的隔震支座設(shè)計(jì),確定了各方案的支座及阻尼器的力學(xué)參數(shù),通過(guò)選擇合適的摩擦系數(shù),可使摩擦擺支座在保證良好減震效果的同時(shí)也能更好地控制罕遇地震下變形,且耐久性較好. 分析結(jié)果表明:摩擦擺支座方案可以達(dá)到鉛芯橡膠支座+黏滯阻尼器方案的隔震效果,并且能使結(jié)構(gòu)變形不至于過(guò)大.

關(guān)鍵詞: 隔震方案; 減震系數(shù); 黏滯阻尼器; 罕遇地震變形; 摩擦系數(shù); 溫度應(yīng)力

中圖分類(lèi)號(hào):TU318.2 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2022)21-0139-05

DOI:10.19701 / j.jzjg.GDAD2209

Comparison and design of seismic isolation schemes for a college building

QU Tao, WEI Wen, GU Jingxin

(Shenzhen Branch of Guangdong Architectural Design & Research Institute Co. , Ltd., Shenzhen 518063, China)

Abstract:The structural height of a college building is 23.5m. The lower part of the building adopts concrete framestructure, and the upper part has a large-span steel truss spanning the teaching area structure at both ends. Three vibrationisolation schemes of lead rubber bearing, lead rubber bearing with viscous damper and friction pendulum bearing werestudied. The seismic isolation bearing design was carried out for all three schemes, and the mechanical parameters of thebearing and damper were determined. By selecting an appropriate friction coefficient, the friction pendulum bearing canbetter control the deformation under rare earthquakes while ensuring good shock absorption effect, and it has gooddurability. The analysis results show that the friction pendulum bearing scheme can achieve the isolation effect of leadrubber bearing + viscous damper scheme, and the deformation of the structure is not too large.

Keywords:seismic isolation scheme; damping coefficient; viscous damper; deformation under rare earthquake; frictioncoefficient; temperature stress

第一作者:屈濤,碩士,高級(jí)工程師,一級(jí)注冊(cè)結(jié)構(gòu)工程師,主要從事結(jié)構(gòu)設(shè)計(jì)工作,Email: 30300277@ qq. com.

[引用本文] 屈濤,衛(wèi)文,古靜欣. 某學(xué)院樓減隔震方案比選與設(shè)計(jì)[J]. 建筑結(jié)構(gòu),2022,52(21):139-143. QU Tao,WEI Wen,GU Jingxin. Comparison and design of seismic isolation schemes for a college building[J]. Building Structure,2022,52(21):139-143.