巨型框架-核心筒结构地震剪力分布特征分析

目前，我国在巨型框架-核心筒结构体系的工程设计中主要参照现行规范对于普通框架-核心筒结构的相关规定执行。然而，巨型框架-核心筒结构与普通框架-核心筒结构的受力特点及规律有所不同，针对巨型框架-核心筒结构与普通框架-核心筒结构的框架剪力分布特征的对比研究有待完善，而且我国现行规范也缺乏对巨型框架-核心筒结构中框架剪力的调整规定。因此，通过典型普通框架-剪力墙与巨型框架-剪力墙平面模型算例的静力分析及典型巨型框架-核心筒结构算例的弹塑性动力时程分析，考察了地震作用下楼层剪力在结构各竖向构件之间的分布规律。结果表明：地震作用下巨型框架-核心筒结构中的框架楼层剪力分布规律与普通框架-核心筒结构有明显区别；巨型框架柱与次框架柱的楼层剪力分布规律存在明显差异；规范中规定的框架剪力调整方法不能直接应用于巨型框架-核心筒结构。结合分析得到的剪力分布规律及已有的工程经验，针对巨型框架-核心筒结构中框架剪力调整方案进行讨论并给出相关建议。

Study on characteristics of seismic shear distribution in mega frame-core tube structure

Mega frame-core tube structures are mainly designed by refering to specifications of current codes for ordinary frame-core wall structures. However, the mechanical characteristics and laws of mega frame-core tube structures and ordinary frame core tube structures are also different. At present, the comparative study on the seismic shear distribution characteristics of the mega frame-core tube structure and the ordinary frame-core tube structure is not adequate, and the adjustment of seismic shear force in the mega frame-core wall structure is not specially specified by Chinese codes. Therefore, through the elastic static analysis and elastic-plastic dynamic time history analysis of typical mega frame core tube structures, the distribution characteristics of seismic shear force among the vertical structural members were investigated. The results show that the seismic shear distribution of mega frame-core tube structure is different from that of ordinary frame-core tube structure. The shear force distribution of mega frame column and sub frame column are different. Current specifications for shear force adjustment should not be directly applied to mega frame-core tube structures. Based on the shear distribution characteristics and practical engineering experience, the suggestions on how to redistribute the shear force in mega frame-core wall structure were proposed.