60~180m钢框架-混凝土核心筒结构与钢框架-中心支撑结构性能及经济性分析

Performance and economy analysis of steel frame and concrete core tube structures and steel frame-concentrically-braced structures at 60~180m

各相关规范对钢框架-钢筋混凝土核心筒结构及钢框架-中心支撑结构的外框架剪力调整方法不同,且对钢结构及混合结构的层间位移角限值有所不同。本文对60~180m钢框架-钢筋混凝土核心筒结构及钢框架-中心支撑结构分别按照不同结构规范设计方法进行计算,对比分析结构设计指标、经济性指标以及抗震性能。分析结果表明,按照各规范设计的模型外框架均能满足"二道防线"的作用,结构均能满足"小震不坏,大震不倒"的抗震设计原则。而在钢框架-中心支撑结构的设计过程中发现,现行常用设计软件无法仅对钢框架-中心支撑结构的外框架钢柱进行剪力调整,据此,本文给出了相应的设计建议,并对后期软件更新提出了改进意见。

For the steel frame and concrete core tube structures and steel frame-concentrically-braced structures the adjust methods from structural specifications are different,and the limit of the maximum displacement angle of the layers is different in steel structure and mixed structure.Therefore,the 60~180 m steel frame and concrete core tube structure and the steel frame-concentrically-braced structures are modeled and calculated according to the different structural specifications in this paper,the structural design indexes,amount usage of steel and the seismic performance are compared and analyzed.It’s showed that the model moment-resisting frames designed according to the above specifications can function as"the second lines of defense",the seismic performance of the structures can achieve the principle of"no damage in small earthquake,no collapsing in the strong earthquake".During the design process of Steel Frame-concentrically-braced Structures,it is found that the current common design software can not adjust the shear force of external frame steel columns.Accordingly,the corresponding suggestions were put forward for the design and software updating.