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吳耀輝¹   婁 宇¹   李愛群²
（1 中國(guó)電子工程設(shè)計(jì)院 北京 100840； 2 東南大學(xué)土木工程學(xué)院 南京 210096）

[摘要] 根據(jù)雙軸對(duì)稱雙塔連體結(jié)構(gòu)在水平地震作用下的受力和變形特點(diǎn)，在連體位置設(shè)置斜向粘滯流體阻尼器對(duì)結(jié)構(gòu)進(jìn)行消能減震。分析了結(jié)構(gòu)各種響應(yīng)隨阻尼系數(shù)的變化情況，結(jié)果表明存在一個(gè)最優(yōu)的阻尼系數(shù)使得結(jié)構(gòu)的響應(yīng)取得最小值。在對(duì)阻尼系數(shù)進(jìn)行優(yōu)化的基礎(chǔ)上，詳細(xì)研究了結(jié)構(gòu)在小震和大震下的減震效果，計(jì)算表明，在采用最優(yōu)阻尼系數(shù)的條件下，結(jié)構(gòu)的最大層間剪力、層間相對(duì)位移和樓層位移等各指標(biāo)都有較好的減震效果。但在大震作用下，由于結(jié)構(gòu)進(jìn)入塑性后本身的阻尼比增加了，阻尼器的耗能比例相對(duì)降低，其減震效果沒有小震時(shí)明顯。
[關(guān)鍵詞] 雙塔連體結(jié)構(gòu)；粘滯流體阻尼器；消能減震

    Energy Dissipation and Vibration Reduction of the Biaxial-symmetric
    Two-tower-connected Structure with Fluid Viscous Dampers
    Wu Yaohuil, Lou Yu1, Li Aiqun2
    (1 China Electronics Engineering Design Institute, Beijing 100840, China;2 Southeast University, Nanjing 210096, China)

Abstract: Based on the load-bearing and deforming behavior of the biaxial-symmetric two-tower-connected structure,  the fluid viscous dampers are used at the location of the connecting part to dissipate energy and reduce the vibration of the structure. The variation of the structure response with the changing darnping factor is analyzed and an optimized darnping factor is found to achieve minimum structural response. By optimizing the damping factor, the vibration reducing effect of viscous fluid dzuuper on the structure is investigated iIl detail under both large and small earthquakes. The calculation has shown that by applying optimal damping factor, satisfactory vibration reducing effect can be obtained iIl terms of major structural parameters, such as the maxnuuru shear force between stories, relative displacement between stories and story displacement. However,  due to the increasing damping ratio after the structure enters plastic phase under a large earthquake, the energy dissipation ra:tio of the dampers will relatively decrease, therefore, the vibration reducing effect will not be so notable as that of the dmupers under a small earthquake.
Keywords: two-tower connected structure;  fluid viscous damper;  energy dissipation and vibration reduction