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 (1 西北工業(yè)大學(xué)，西安 710072；2 煤炭工業(yè)部西安設(shè)計(jì)研究院，西安 710054)

［摘要］研究子結(jié)構(gòu)剛度對(duì)巨子型有控結(jié)構(gòu)位移響應(yīng)的影響。結(jié)合剛度變化研究附加阻尼對(duì)巨子型有控結(jié)構(gòu)的影響規(guī)律，并分析附加阻尼在巨子型有控結(jié)構(gòu)中的作用。結(jié)合12種場(chǎng)地工況研究巨子型有控結(jié)構(gòu)減震性能對(duì)地震激勵(lì)的適應(yīng)性。結(jié)果表明：附加阻尼可以改進(jìn)子結(jié)構(gòu)動(dòng)力性能，確保巨子型有控結(jié)構(gòu)在更寬的激勵(lì)頻率范圍內(nèi)工作，且將巨、子結(jié)構(gòu)的側(cè)移響應(yīng)進(jìn)一步降低；子結(jié)構(gòu)剛度越小，附加阻尼對(duì)巨子型有控結(jié)構(gòu)的影響越大；巨子型有控結(jié)構(gòu)中，附加阻尼存在優(yōu)化區(qū)間；子結(jié)構(gòu)剛度對(duì)優(yōu)化區(qū)間影響不大；裝有附加阻尼的巨子型有控結(jié)構(gòu)相比于未安裝附加阻尼前，對(duì)子結(jié)構(gòu)側(cè)移控制率可達(dá)81.9%，對(duì)巨結(jié)構(gòu)側(cè)移控制率可達(dá)71.5%；巨結(jié)構(gòu)側(cè)移響應(yīng)控制率對(duì)場(chǎng)地條件具有很好的適應(yīng)性。

［關(guān)鍵詞］巨子型有控結(jié)構(gòu)；隨機(jī)振動(dòng)；復(fù)模態(tài)分析；調(diào)諧減振原理

Investigation on dynamic performance of the mega-sub controlled frame under horizontal earthquake

Lian Yeda1, Zhang Xunan1, Wang Zhaoxia2

(1 Northwestern Polytechnical University, Xian 710072, China;

2 Xian Institute of Coal Industrial Department, Xian 710054, China)

Abstract:The effect of the sub-structure stiffness on the dynamic performance of the mega-sub controlled frame was investigated. Effect rules of the additional damping to the mega-sub controlled frame with different sub-stuctural stiffness were researched, and the function of the additional damping in the mega-sub controlled frame was examined. Results show that the additional damping can improve the sub-structure dynamic performance, and ensure the mega-sub controlled frame to exert its self-control function, and further reduce the displacement of the mega-structure and the sub-structure. Optimized additional damping exits in the mega-sub controlled frame, and it is scarcely affected by the change of the sub-structure stiffness. Control ratio of the mega-sturcture displacement can be adapted to all kinds of sites well.

Keywords:mega-sub controlled frame; random vibration; complex modal analysis; tuned vibtation-absorption theory

國(guó)家自然科學(xué)基金(51078311)，西北工業(yè)大學(xué)科技創(chuàng)新基金資助(M450211)。

作者簡(jiǎn)介：連業(yè)達(dá)，博士，Email:lianyeda@163.com。

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