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(1 廣州大學(xué)土木工程學(xué)科博士后流動站, 廣州 510006; 2 廣州大學(xué)土木工程學(xué)院, 廣州 510006;3 浙江省建筑設(shè)計研究院,杭州 310000)
[摘要]復(fù)合型鉛黏彈性阻尼器是綜合利用多種耗能機(jī)制的新型阻尼器,針對其在結(jié)構(gòu)中的模擬及減震性能的把握是實際設(shè)計應(yīng)用中的關(guān)鍵問題。結(jié)合某4層框架減震實例,通過對設(shè)置復(fù)合型鉛黏彈性阻尼器減震結(jié)構(gòu)在多遇地震和罕遇地震作用下的動力時程分析,考察了阻尼器在減震結(jié)構(gòu)中的耗能表現(xiàn)及減震效果。結(jié)果表明,復(fù)合型鉛黏彈性阻尼器用于鋼筋混凝土框架結(jié)構(gòu)中可有效提高整體結(jié)構(gòu)的抗震性能,并能減緩或避免主體結(jié)構(gòu)構(gòu)件的塑性破壞,保護(hù)主體結(jié)構(gòu)的安全,實現(xiàn)結(jié)構(gòu)“強(qiáng)柱弱梁”的屈服機(jī)制。
[關(guān)鍵詞]復(fù)合型鉛黏彈性阻尼器; 消能減震; 抗震性能; 屈服機(jī)制
中圖分類號:TU352-1文獻(xiàn)標(biāo)識碼:A文章編號:1002-848X(2017)08-0059-05
Energy dissipation analysis of a frame structure equipped with composite lead-viscoelastic dampers
Zhang Chao1,2, Zhou Yun2, Cai Fengsheng3, Lu Dehui2, Shi Fei2
(1 Postdoctoral Research Station of Civil Engineering, Guangzhou University, Guangzhou 510006, China; 2 College of Civil Engineering, Guangzhou University, Guangzhou 510006, China; 3 Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310000, China)
Abstract:The composite lead-viscoelastic damper (CLVD) is a novel damper with multiple energy-dissipated systems, and researches on its simulation and damping effects in real structure have become the key issues in its practical application. A four-storey reinforce concrete (RC) frame was introduced as case study, and dynamic time-history analysis of the damped frame equipped with CLVDs was conducted under frequently-occurred earthquake and rarely-occurred earthquake, so as to investigate the energy-dissipated capacity of dampers and the vibration-control effect of the damped frame. The research results indicate that the CLVD can be applied in RC frame to enhance seismic performance of the whole structure, and also mitigate or avoid plastic failures of the main structural components, so that the major structure can be safe and the desirable yielding mechanism of “strong-column-weak-beam” can be achieved.
Keywords:composite lead-viscoelastic damper; energy dissipation; seismic performance; yielding mechanism
* 教育部長江學(xué)者和創(chuàng)新團(tuán)隊發(fā)展計劃項目(IRT13057),廣州市科技計劃項目(201607010026),廣州市博士后科研項目啟動經(jīng)費(fèi)(gdbsh2013011)。
作者簡介:張超,博士,Email:superzh2013@163.com。
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