某中學(xué)框架結(jié)構(gòu)減震優(yōu)化控制及抗震加固分析*
楊康1,2，張志強(qiáng)1，周晨1
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（1 東南大學(xué)土木工程學(xué)院， 南京 210096； 2 同濟(jì)大學(xué)建筑設(shè)計(jì)研究院（集團(tuán)）有限公司，上海 200092）
［摘要］針對(duì)位于Ⅳ類(lèi)土上需要進(jìn)行抗震加固的某中學(xué)框架結(jié)構(gòu)，采用結(jié)構(gòu)減震控制理論，選取非線性黏滯流體阻尼器耗能裝置對(duì)結(jié)構(gòu)進(jìn)行減震優(yōu)化控制，并對(duì)安裝阻尼器后結(jié)構(gòu)局部構(gòu)件進(jìn)行加固。首先基于ETABS軟件建立三維彈性模型，對(duì)7條地震波輸入下減震前后結(jié)構(gòu)的動(dòng)力響應(yīng)進(jìn)行多遇地震下的彈性時(shí)程分析，經(jīng)過(guò)優(yōu)化設(shè)計(jì)與比選確定黏滯流體阻尼器的參數(shù)與個(gè)數(shù)。同時(shí)建立三維彈塑性分析模型進(jìn)行了彈塑性時(shí)程分析，并從力、變形和能量三大指標(biāo)方面對(duì)減震前后的結(jié)構(gòu)在多遇和罕遇地震作用下的地震響應(yīng)結(jié)果進(jìn)行對(duì)比分析。結(jié)果表明，采用的優(yōu)化方法方便快捷，選取的非線性黏滯流體阻尼器減震方案可以提高結(jié)構(gòu)的整體抗震性能，起到了良好的減震效果。［關(guān)鍵詞］減震控制; 框架; 黏滯流體阻尼器; 彈塑性時(shí)程分析中圖分類(lèi)號(hào)：TU352 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2016)05-0029-05
Damping optimal control and seismic strengthening analysis on the frame structure of a middle schoolYang Kang1,2, Zhang Zhiqiang1, Zhou Chen1(1 School of Civil Engineering, Southeast University, Nanjing 210096, China; 2 Tongji Architectural Desigh (Group) Co., Ltd., Shanghai 200092, China)Abstract:For the frame structure of a middle school where the foundation soil is classified Ⅳ, nonlinear viscous dampers were installed and local members were strengthened based on the structural vibration control theory to make a optimal control. Firstly, the 3D elastic model was established by ETABS software, the elastic seismic time history analysis of seven earthquake waves was made with or without the dampers, and the parameters and number of the viscous dampers were determined after optimal design and scheme comparison. Meanwhile, the 3D elastic-plastic model was established and dynamic nonlinear time history analysis was finished. Seismic response under frequent and rare earthquake was analyzed from the aspects of force, deformation and energy dissipation for the structure with and without optimal control. The analysis results show that the optimal design method is convenient and efficient, and it can improve the overall seismic performance of the structure using the nonlinear viscous fluid dampers.Keywords:damping control; frame structure; viscous damper; elasticplastic time history analysis
*國(guó)家自然科學(xué)基金資助項(xiàng)目（51278106），江蘇省住房和城鄉(xiāng)建設(shè)廳專(zhuān)項(xiàng)“消能減震技術(shù)在既有建筑抗震加固中的應(yīng)用研究”。作者簡(jiǎn)介：楊康，碩士研究生，Email：220121022@seu.edu.cn。
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