天津现代城A区塔楼结构弹塑性分析
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（天津市建筑设计院， 天津 300074）
［摘要］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。［关键词］超高层结构; 大高宽比; 钢筋混凝土框架-支撑-核心筒结构; 弹塑性分析; 屈曲约束支撑中图分类号：TU398 文献标识码：A 文章编号：1002-848X(2015)23-0040-06
Elasto-plastic analysis of the tower structure in A district of Tianjin Modern CityWang Yang, Chen Bohua, Zhao Hua, Zhang Fu(Tianjin Architecture Design Institute, Tianjin 300074, China)Abstract: The tower in A district of Tianjin Modern City is a super high-rise structure with large aspect ratio. RC frame-brace-corewall structural system is adopted to solve the problem of large structural stiffness difference in two directions considering weak stiffness in shorter length direction. Both common steel braces and buckling restrained braces are adopted in the structural bracing system in form of hybrid arrangement. The design idea was realized that the braces were yield status in advance of core walls and the bracing system can ensure the structural stiffness as well as exerting energy dissipation capacity of buckling restrained braces under earthquake. Considering the structural characteristics, the EPDA software, SAUSAGE software and ABAQUS software were used to carry out elasto-plastic time-history analyses under both fortification earthquake and rare earthquake to obtain the mechanical states of braces and damage states. Analyses show that the main lateral force resisting members basically stay elastic under fortification earthquake. However, under rare earthquake, slight to moderate damages occur in critical members such as the bottom layers of core walls, bottom layers of frame-supporting columns and frame columns connected to braces. Structural deformation meets relevant specification requirements and structural system is reasonable and feasible.Keywords: super high-rise structure; large aspect ratio; RC frame-brace-corewall structure; elasto-plastic analysis; buckling restrained brace
作者简介：王杨，硕士，高级工程师，Email：vipwangcn@qq.com。
