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朱 鳴， 王春磊， 張 徐
（北京市建筑設(shè)計(jì)研究院，北京 100045）[摘要] 弱連體結(jié)構(gòu)通過弱連接節(jié)點(diǎn)將各單體連為一個整體結(jié)構(gòu)，弱連接節(jié)點(diǎn)可以采用摩擦擺支座或鉛芯橡膠支座等。為研究弱連體結(jié)構(gòu)的受力特點(diǎn)，結(jié)合某弱連體結(jié)構(gòu)，分別建立了整體模型和各單體的獨(dú)立模型，進(jìn)行小震作用下的時(shí)程分析。針對各單體的基底剪力、頂點(diǎn)位移、典型墻肢內(nèi)力與典型框架柱內(nèi)力等指標(biāo)，比較兩種模型的峰值結(jié)果，同時(shí)對比了結(jié)構(gòu)頂點(diǎn)位移與加速度時(shí)程響應(yīng)曲線。結(jié)果表明，弱連接連廊對主樓影響較小，可以采用單塔的反應(yīng)譜分析結(jié)果作為主要構(gòu)件的設(shè)計(jì)依據(jù)。
[關(guān)鍵詞] 弱連體結(jié)構(gòu)；隔震支座；時(shí)程分析；整體模型；單體模型
中圖分類號：TU398.9 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2011) Sl-0195-05Comparison of time-history analysis between whole model and single model of weakly-connected structure
Zhu Ming, Wang Chunlei, Zhang Xu
( Beijing Institute of Architectural Design, Beijing 100045, China)Abstract: Weakly-connected structure is a structure composed of single towers joined with weak-connection joints. Weak-connection joints can realized using LRB( Lead Rubber Bearing) or FPB( Friction Pendulum Bearing) ,etc. To research the characteristics of weakly-connected structure, based on a real structure of this type, whole model and single model were built separately, and time-history analysis under frequently occurred earthquake was carried out. In terms of basement shear force, displacement at top, interior force of typical walls and interior force of typical columns, peak values of the two models were compared. Time-history response curve of displacement and acceleration at top were also compared. The results showed that the weakly-connected gallery had insignificant influence on main tower, thus the results of response spectrum analysis can be used for most members of main tower.
Keywords: weakly-connected structure; isolation bearings; time-lustory analysis; whole model; single model
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