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天津湾D地块1号塔楼为超限高层结构,采用钢管混凝土框架-核心筒结构体系,本文采用ABAQUS软件建立三维整体数值分析模型,采用损伤塑性本构考虑材料的非线性特性,利用显式直接积分方法进行钢管混凝土框架-核心筒超限高层非线性时程分析。分析得到:罕遇地震作用下结构最大层间位移角满足规范要求,结构基底剪力与频遇地震作用下结构基底剪力比值合理,核心筒剪力墙和外框架柱损伤状态满足预定的性能目标要求,连梁塑性发展明显并起到耗能作用。综上所述,该超限高层结构在大震作用下仍能保持良好的承载能力,满足预定抗震性能目标要求。
Tianjin Bay D block No. 1 tower is over-limit high-rise structure, using CFST frame-core tube structure system. In this paper, ABAQUS software to establish three-dimensional numerical analysis model, using plastic damage constitutive to consider the nonlinear characteristics of materials, the use of explicit Direct Integral Method for Nonlinear Time History Analysis of CFST Frame - Core. The results show that under the rare earthquakes, the displacement angle of the maximum story of the structure meets the requirements of the code. The ratio of the shear strength of the structural foundation is reasonable under the condition of structural base shear and frequent earthquakes. The damage conditions of the core tube shear wall and the outer frame column satisfy the predetermined performance Target requirements, even the plastic beam obvious development and play a role in energy consumption. In summary, the overrun high-rise structure can still maintain a good bearing capacity under the action of a large earthquake to meet the predetermined seismic performance target requirements.