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（中南林業(yè)科技大學(xué)土木工程與力學(xué)學(xué)院， 長沙 410000）
[摘要]大底盤多塔樓結(jié)構(gòu)屬于復(fù)雜高層結(jié)構(gòu)，它的體型龐大復(fù)雜，平面不規(guī)則，剛度分布不均勻，并伴隨著復(fù)雜的扭轉(zhuǎn)，其設(shè)計及抗震研究難度較大。主要對大底盤雙塔對稱結(jié)構(gòu)水平地震作用及反應(yīng)進(jìn)行分析，采用MADIS/Gen軟件建模分析，對比分析了雙塔結(jié)構(gòu)整體模型與單塔結(jié)構(gòu)模型的地震作用與地震反應(yīng)差別，包括樓層剪力、樓層位移、層間位移角和樓層傾覆彎矩。研究結(jié)果表明，整體分析模型與單塔分析模型比較，后者樓層剪力偏小，樓層位移接近，層間位移角偏小，傾覆力矩偏大。對多塔結(jié)構(gòu)，宜按整體模型和單塔模型分別計算，并采用較不利的結(jié)果進(jìn)行結(jié)構(gòu)設(shè)計。
[關(guān)鍵詞]雙塔結(jié)構(gòu)； 水平地震反應(yīng)； 整體模型分析； 單塔模型分析
中圖分類號： TU352 文獻(xiàn)標(biāo)識碼： A文章編號： 1002-848X(2016)S2-0278-04
Analysis of seismic response of large chassis two-tower structures
Zhu Yao， Chen Bowang
(Central South University of Forestry and Technology， Changsha 410000， China)
Abstract： Large multi-tower chassis structure is complex high-rise structure with a large and complex size, irregular plane, uneven distribution stiffness, along with a complex twist, the design and seismic research is difficult. It focuses on the horizontal seismic action of symmetrical twin towers. MADIS/Gen was used to model and analyze the structure, the main research is the influence of the horizontal earthquake effect on structure. The seismic force and displacement are compared of twin towers symmetrical structure and a single tower structure, including the floor shear, floor displacements, interlayer displacement angle and the floor overturning moment. The results show that, compared the twin towers with the single tower model, the latter′s floor shear and interlayer displacement angle is smaller than the former′s, and both floor displacements is close, and the latter′s floor overturning moment is larger than the former. As a result, the multi tower structure should be respectively calculated according to the overall model and single tower model, and chose the more unfavorable results for structural design.
Keywords： two-tower structure; horizontal earthquake response; overall analysis; single tower model analysis
作者簡介：朱瑤，碩士研究生，Email：229412102@qq.com。
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