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（中國航空規(guī)劃設(shè)計(jì)研究總院有限公司， 北京 100120）

［摘要］對(duì)于基礎(chǔ)隔震結(jié)構(gòu)，隔震層的水平剛度和阻尼比是其減震效率的關(guān)鍵因素。以成都博物館為工程實(shí)例，以試驗(yàn)得到橡膠隔震支座的力學(xué)性能參數(shù)為基礎(chǔ)，建立隔震與非隔震結(jié)構(gòu)有限元計(jì)算模型。在多遇地震作用工況下和罕遇地震作用工況下，隔震層水平剛度在0-25～2-0倍實(shí)際工程隔震層水平剛度范圍內(nèi)，阻尼比在5%～30%范圍內(nèi)，對(duì)比分析結(jié)構(gòu)層加速度、總剪力及總傾覆力矩的減震效率變化趨勢，以及減震效率與隔震層水平剛度和阻尼比之間的對(duì)應(yīng)關(guān)系?；趯?duì)比分析結(jié)果，對(duì)采用疊層橡膠支座的基礎(chǔ)隔震結(jié)構(gòu)，提出了不同隔震目標(biāo)下隔震層水平剛度和阻尼比的建議取值范圍。

［關(guān)鍵詞］基礎(chǔ)隔震； 隔震層； 減震效率； 水平剛度； 阻尼比

中圖分類號(hào)：TU352-1+2文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)11-0123-05

Study on design of the isolation layer′s performance of base isolation structure

Zhang Mansheng, Zhang Guojun, Ma Botao, Wang Mingzhu, Zhang Ling, Liu Xingang, Ge Jiaqi

（China Aviation Planning and Design Institute (Group) Co., Ltd., Beijing 100120, China）

Abstract:For the base isolation structure, the horizontal stiffness and damping ratio of the isolation layer are the crucial factors for its damping efficiency. Taking Chengdu Museum as an example, a finite element model of non-isolated structure was established, along with a finite element model of isolated structure based on the mechanical properties of the rubber isolators. Under the conditions  of frequently and rarely occurred earthquakes, the horizontal stiffness of the isolation layer is 0-25～2-0 times of that of the actual engineering isolation layer, and the damping ratio is in the range of 5%～30%. The trends of the  seismic reduction ratio  of the structural layer acceleration, the total shear force and the total overturning bending moment have been analyzed. The  seismic reduction ratio  have been corresponded to the horizontal stiffness and damping ratio of the isolation layer. Based on the results of comparison, the recommended values of the horizontal stiffness and damping ratio of the isolation layer are proposed for the base isolation structure composed of laminated rubber bearing under different damping targets.

Keywords:base isolation; isolation layer; seismic reduction ratio; horizontal stiffness; damping ratio

*北京市科委科技服務(wù)業(yè)專項(xiàng)（Z141110001714003），中國航空規(guī)劃建設(shè)發(fā)展有限公司技術(shù)進(jìn)步研發(fā)課題（技14研17）。

通訊作者：馬伯濤，博士，高級(jí)工程師，Email: mabotao@avic-capdi.com。