高层钢框架-混凝土核心筒混合结构振动台试验研究

Shaking table model test of a high-rise hybrid structure building with steel frame-concrete core wall

为了研究高层钢框架-混凝土核心筒混合结构的整体抗震性能,本文设计了一个典型的比例为1/15的20层钢框架-混凝土核心筒混合结构的缩尺模型,在同济大学土木工程防灾国家重点实验室实施了模拟地震振动台试验。本文重点介绍试验中模型结构在各级水准地震作用下的动力特性、加速度和位移反应,描述了模型结构的破坏位置及过程,并根据相似理论得到了原型结构的地震反应。试验研究表明:原型结构基本能够满足我国现行规范"小震不坏、大震不倒"的抗震设防标准;核心筒发挥了主要抗侧力作用;结构在大震作用下有较好的延性;钢框架与核心筒的连接节点在结构设计时应给予重视。

In order to study the seismic performance of a high-rise hybrid structure building with steel frame-concrete core wall,a 1/15 scale model of a typical 20-story steel frame-concrete core wall hybrid structure is designed and tested on the shaking table in State key laboratory for disaster reduction in civil engineering of Tonji University.This paper focuses on the study of the dynamic characteristics,acceleration and displacement responses of the model structure under different earthquake levels.The location and process of structure damage is analyzed and the seismic responses of the prototype structure are interpreted according to the similitude relation.It is shown that the prototype structure can satisfy the requirements of no damage under frequent earthquakes and no collapse under rare earthquakes basically;concrete core wall plays a major role in resisting lateral force;structural system has good ductility under rare earthquake;and the connection between the steel frame beam and the core wall should be paid attention to in the design of the structure.