- 摘 要
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杜永峰1,2，李春鋒2
(1西部土木工程防災(zāi)減災(zāi)教育部工程研究中心，蘭州730050；2蘭州理工大學(xué)防震減災(zāi)研究所，蘭州730050)[摘要] 針對一非對稱雙塔連體結(jié)構(gòu)，在連廊兩端采用水平柔性而豎向剛性的連接方式，并配合阻尼器減小結(jié)構(gòu)地震響應(yīng)。建立了串并聯(lián)質(zhì)點系層模型，分析了柔性連體結(jié)構(gòu)對兩種基本振型，即對稱與非對稱振型的影響。分析了非對稱連體結(jié)構(gòu)的振動方程，討論了阻尼連廊位置在各樓層間發(fā)生變動時結(jié)構(gòu)自振周期的變化規(guī)律，利用時程分析方法，對沿連廊設(shè)置方向施加EL Centro地震波的結(jié)構(gòu)響應(yīng)進(jìn)行數(shù)值模擬，探討了阻尼器的配置方式。研究結(jié)果表明，采用本文的模型可以合理分析連體結(jié)構(gòu)的動力響應(yīng)。引入耗能裝置可以大大減小結(jié)構(gòu)在地震作用下的動力響應(yīng)，提高連體結(jié)構(gòu)的抗震性能。
[關(guān)鍵詞] 高層連廊結(jié)構(gòu)；阻尼減震結(jié)構(gòu)；高層建筑；結(jié)構(gòu)抗震；地震響應(yīng)Seismic Response of the Flexible Connected High-rise Building and the Damper Arrangement
Du Yongfeng1,2, Li Chunfeng2
(1 Western Center of Disaster Mitigation in Civil Engineering, Ministry of Education, Lanzhou 730050, China; 2 Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou 730050, China)Abstract: A unsymmetrical flexible connection spanning a twin-tower structure is employed to reduce the seismic response of the tower structure. A type of connectors, which are horizontally flexible while vertically rigid, are combined with dampers for adjacent tall building structures. A series-parallel particles system model is established, and is used to discuss the characteristics of vibration mode, i.e., the symmetric and asymmetric, which are the two basic modes of flexible connected structure. The vibration equation of unsymmetrical connection structure is used to discuss the response of structure, and the vibration mode and periods are computed for different positions of the damper comdors. Time domain response is discussed by inputting El Centro seismic wave (1940) along the corridor direction, and the variation of peak response and energy dissipating ability of dampers are examined when the location of connectors changed. The results show that the model proposed in this paper is reasonable for analysis of the connected structures, and the introducing of energy dissipation devices can greatly reduce the seismic response of structures, and can improve the seismic performance of the connected structures.
Keywords: high-rise connected building; energy dissipation structure, high-rise building; damper connection, seismic response
