程绍革
    (中国建筑科学研究院抗震所 北京 100013)

[提要]  对北京国贸大厦进行了罕遇大震下的弹塑性时程分析，指出了钢-混凝土筒混合结构的地震反应特点，并对此类结构设计时的位移控制、高宽比、塑性铰机制和加强层设置等提出了一些设想。
[关键词]  混合结构 位移控制  高宽比 塑性铰  加强层

Base on the plastic and elastic duration analyses to China World Tower in rare earthquake, the issue shows the characteristics of earthquake reaction of steel-concrete mixture tubular structure. Some considerations are also delivered, such as displacement control, ratio of height to width, plastic hinges mechanics and strengthening layer setup etc.
Keywords: mixture structure; displacement  control; depth-width  ratio; plastic  hinge; strengthening layer