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大底盘多塔楼结构属于复杂高层结构,它的体型庞大复杂,平面不规则,刚度分布不均匀,并伴随着复杂的扭转,其设计及抗震研究难度较大。主要对大底盘双塔对称结构水平地震作用及反应进行分析,采用MADIS/Gen软件建模分析,对比分析了双塔结构整体模型与单塔结构模型的地震作用与地震反应差别,包括楼层剪力、楼层位移、层间位移角和楼层倾覆弯矩。研究结果表明,整体分析模型与单塔分析模型比较,后者楼层剪力偏小,楼层位移接近,层间位移角偏小,倾覆力矩偏大。对多塔结构,宜按整体模型和单塔模型分别计算,并采用较不利的结果进行结构设计。
The multi-tower structure of the large chassis belongs to the complicated high-rise structure. Its body size is huge and complex, the plane is irregular, the stiffness is unevenly distributed, and accompanied by complicated torsion, its design and seismic study are more difficult. This paper mainly analyzes the horizontal seismic action and reaction of the twin-tower symmetry structure of large chassis, and analyzes and compares the seismic action and seismic response of the twin-tower structure model and the single-tower structure model by MADIS / Gen software modeling and analysis, including floor shear , Floor displacement, floor drift angle and floor tipping moment. The results show that compared with the single-tower analysis model, the overall analysis model shows that the latter shear is small, the floor displacement is close, the displacement angle between layers is small, and the overturning moment is larger. For multi-tower structures, the overall model and single-tower model should be calculated separately and the structural design should be carried out with less favorable results.