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基礎(chǔ)隔震和非隔震結(jié)構(gòu)模型振動(dòng)臺(tái)試驗(yàn)對(duì)比研究*
陸偉東,吳曉飛,劉偉慶
摘 要

 

 

陸偉東,吳曉飛,劉偉慶(南京工業(yè)大學(xué)土木工程學(xué)院,南京 210009)

[摘要]昆明新國際機(jī)場(chǎng)航站樓(A區(qū))結(jié)構(gòu)為目前世界最大單體隔震結(jié)構(gòu)。建立了該建筑1/60縮尺模型,完成了隔震結(jié)構(gòu)模型和非隔震結(jié)構(gòu)模型的振動(dòng)臺(tái)對(duì)比試驗(yàn)。研究了隔震結(jié)構(gòu)模型和非隔震結(jié)構(gòu)模型的動(dòng)力特性,以及隔震結(jié)構(gòu)在8.2度多遇、基本、罕遇地震烈度作用下和非隔震結(jié)構(gòu)在7.5度多遇、基本、罕遇地震烈度作用下結(jié)構(gòu)的加速度和位移反應(yīng),以及基礎(chǔ)隔震對(duì)結(jié)構(gòu)頂部大跨網(wǎng)架豎向振動(dòng)的影響。研究結(jié)果表明,基礎(chǔ)隔震能夠延長結(jié)構(gòu)自振周期,增加結(jié)構(gòu)阻尼比,有效降低隔震層上部結(jié)構(gòu)的地震反應(yīng),同時(shí)能夠有效降低大跨網(wǎng)架結(jié)構(gòu)的豎向振動(dòng);發(fā)現(xiàn)該建筑進(jìn)行基礎(chǔ)隔震后按照7.5度設(shè)防烈度設(shè)計(jì)能夠滿足8.2度設(shè)防烈度要求,且滿足小震不壞、中震可修、大震不倒的抗震設(shè)防要求。

[關(guān)鍵詞]昆明新國際機(jī)場(chǎng);基礎(chǔ)隔震;振動(dòng)臺(tái)試驗(yàn);大跨

中圖分類號(hào):TU352-1文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1002-848X(2012)04-0034-04

Research on shaking table test of base isolated and ordinary structure 

Lu Weidong, Wu Xiaofei, Liu Weiqing(College of Civil Engineering, Nanjing University of Technology, Nanjing 210009, China)

Abstract:Now Kunming New International Airport Terminal (A area) is the biggest single base isolated structure in the world. The scale model of 1∶60 was set, and the shaking table test about the comparison on the isolated and the non-isolated structure model was completed. The dynamic characteristics between the isolated and non-isolated model were researched. The action of the acceleration and the displacement of the isolated structure under frequently-occur earthquake, basic earthquake, rare earthquake as well as the non-isolated structure under these three levels of earthquake was obtained. Meanwhile the effect of base isolation on vertical vibration of the large-span grid was also studied. The results show that the base isolated structure can extend the natural period of the structure, increase the structural damping ratio, and reduce the seismic response of the structure above isolation layer effectively, as well as reduce the vertical vibration of the large-span grid structure. The building for the base isolation design in the accordance with 7.5 degrees fortification intensity can meet 8.2 security requirements, and meet the requirements for the seismic resistance of “no damage under minor earthquake, repairable under moderate earthquake and no destruction under large earthquake”.

Keywords:Kunming New International Airport; base isolation; shaking table test; large-span

*云南省科技計(jì)劃項(xiàng)目( 2008CA007)。

作者簡介:陸偉東,博士,教授,Email:wdlu@njut.edu.cn。

參考文獻(xiàn)

[1]施衛(wèi)星建筑結(jié)構(gòu)基礎(chǔ)隔震系統(tǒng)的發(fā)展和應(yīng)用[J]結(jié)構(gòu)工程師,1997(1):14-18.

[2]束偉農(nóng),朱忠義,柯長華,等. 昆明新機(jī)場(chǎng)航站樓工程結(jié)構(gòu)設(shè)計(jì)介紹[J].建筑結(jié)構(gòu),2009,39(5):12-17.

[3]陸偉東,劉偉慶,吳曉飛,等. 昆明新國際機(jī)場(chǎng)航站樓A區(qū)結(jié)構(gòu)模型振動(dòng)臺(tái)試驗(yàn)研究[J]. 建筑結(jié)構(gòu)學(xué)報(bào),2011,32(6):27-33.

[4]周穎,盧文勝,呂西林.模擬地震振動(dòng)臺(tái)模型實(shí)用設(shè)計(jì)方法[J].結(jié)構(gòu)工程師,2003(3):30-33.

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