(中船第九設(shè)計(jì)研究院工程有限公司,上海200063)

 [摘要] 針對(duì)某商業(yè)中心大跨樓蓋振動(dòng)舒適度問題，在對(duì)國內(nèi)外樓蓋振動(dòng)評(píng)價(jià)標(biāo)準(zhǔn)進(jìn)行匯總分析的基礎(chǔ)上，通過建立整體有限元模型，研究該類建筑中大跨樓蓋的振動(dòng)特性。以IABSE建議的單人步行激勵(lì)為基礎(chǔ)，對(duì)該大跨樓蓋進(jìn)行了人行荷載模擬，并通過多點(diǎn)輸入和時(shí)程分析法對(duì)該樓蓋進(jìn)行振動(dòng)舒適度分析，分析結(jié)果表明：采用TMD減振系統(tǒng)可以有效地控制大跨樓蓋的豎向振動(dòng)，各工況下的振動(dòng)平均衰減率可達(dá)45%。通過對(duì)影響TMD減振效果的彈簧剛度、有效質(zhì)量等參數(shù)進(jìn)行分析，優(yōu)化得到TMD布置的最佳參數(shù)。本文可為類似的大跨樓蓋的振動(dòng)舒適度的分析和控制系統(tǒng)設(shè)計(jì)提供參考和借鑒。

[關(guān)鍵詞] 大跨樓蓋；振動(dòng)控制；調(diào)諧質(zhì)量阻尼器；舒適度

中圖分類號(hào)：TU375.5              文獻(xiàn)標(biāo)識(shí)碼：A 

Design and analysis on vibration control of long-span floor structures based on simulation of crowd walking

   Wu Yibin，Zhu Weihua，Qu Ge

(China Shipbuilding NDRI Engineering Co., Ltd.，Shanghai 200063，China)

Abstract：The vibration serviceability of long-span floors in large business mansion is studied. Based on reviewing on the evaluation standard of floors vibrations in different reports, a finite element model is established to know the vibration properties of the long-span floors in this structure. The human induced loads are modeled by using single person walking forces of IABSE. Then the vibration serviceability of the floors is analyzed by a multi-support excitation and time history analysis method. The results show that the TMD systems can control the vertical vibration of the long-span floor effectively and the average attenuation rate can be up to about 45%. Finally, the main factors of TMD, stiffness, quality are analyzed to obtain the optimized parameters. The study described in this paper can provide a reference for the analysis of vibration serviceability and determination of control system for these structures.

Keywords: long-span floor; vibration control; tuned mass dampers; human comfort

參考文獻(xiàn)

[1]       徐慶陽，李愛群，張志強(qiáng),等. 考慮人體舒適度的大跨度懸掛結(jié)構(gòu)振動(dòng)控制研究[J].振動(dòng)與沖擊,2008,27 (4):139-142.

[2]       ELLINGWOOD B, TALLIN A. Structural serviceability: floor vibrations [J]. Journal of Structural Engineering,1984,110 (2):401-418.

[3]       李愛群,陳鑫,張志強(qiáng). 大跨樓蓋結(jié)構(gòu)減振設(shè)計(jì)與分析[J].建筑結(jié)構(gòu)學(xué)報(bào),2010,31(6):19-30.

[4]       韓小雷, 陳學(xué)偉,毛貴牛,等.基于人群行走仿真的樓板振動(dòng)分析方法及反應(yīng)譜公式推導(dǎo)[J].建筑科學(xué),2009,25(5):4-10.

[5]       陳興, 張志強(qiáng), 李霆,等. 西安北站高架層樓蓋舒適度分析與減振設(shè)計(jì)[J].建筑結(jié)構(gòu),2011,41(7):40-46.

[6]       American Institute of Steel Inc. Floor vibrations due tohuman activity[S]. USA, Chicago,Illinois:American Institute of Steel Inc, 2003.

[7]       International Organization for Standardization. ISO 2631-2. Evaluation of human exposure to whole-body vibration[S]. Switzerland：International Standardization Organization, 1989.

[8]       American Institute of Steel Construction. AISC/CISC steel design guide series[S]. Floor vibrations due to human activity. Chicago: American Institute of Steel Construction, 1997.

[9]       JGJ 99—98. 高層民用建筑鋼結(jié)構(gòu)技術(shù)規(guī)范[S]. 北京：中國建筑工業(yè)出版社,2006.

[10]    GB 50010—2010 混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范[S]. 北京：中國建筑工業(yè)出版社,2010.

[11]    葉正強(qiáng),李愛群,等.某大跨人行天橋的消能減振設(shè)計(jì)(一)[J].特種結(jié)構(gòu),2003,20(1): 68-70.