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天津现代城A区塔楼为大高宽比超高层结构,采用钢筋混凝土框架-支撑-核心筒结构体系,解决了结构短向刚度弱、两向刚度相差大的问题,结构支撑体系采用了普通钢支撑与屈曲约束支撑混合布置的形式,实现地震作用下支撑先于核心筒墙体进入屈服状态,支撑体系既保证结构的刚度,又发挥屈曲约束支撑耗能能力的设计思想。针对结构特点,采用EPDA软件、SAUSAGE软件和ABAQUS软件进行了中震及大震作用下的弹塑性时程分析,得到了支撑受力及结构的损伤状态。分析表明,中震作用下结构主要抗侧力构件基本处于弹性工作状态;大震作用下结构底层核心筒、底层框支柱、与支撑相连框架柱等关键构件出现轻微至中等程度损伤;结构变形满足规范相关要求,结构体系合理可行。
Tianjin Modern City District A tower is a large aspect ratio ultra-high-rise structure, the use of reinforced concrete frame - support - the core tube structure system to solve the short structural stiffness is weak, large difference between the two-dimensional stiffness problem, the structural support system using ordinary steel The support and the buckling restraint support hybrid arrangement form, so that the earthquake support the support prior to the core tube wall into the yield state, the support system not only ensures the structural rigidity, but also flexibly constrains the support energy dissipation design concept. According to the structural characteristics, EPDA software, SAUSAGE software and ABAQUS software were used to analyze the elasto-plastic time-history under moderate and strong earthquakes, and the damage condition of supporting force and structure was obtained. The analysis shows that under the action of medium earthquakes, the main anti-side members of the structure are basically in elastic working condition. The key components such as the core structure of the bottom core, the bottom frame and the supporting frame are damaged slightly or moderately under the action of large earthquake. To standardize the relevant requirements, the structural system is reasonable and feasible.