偏心支撑钢管混凝土框架－核心简结构的弹性时程分析

在钢管混凝土框架－核心筒结构外框架部分布置竖向偏心支撑和腰（帽）连偏心支撑，形成弱框架，有利于提高结构的整体性和抗震性能．通过算例比较了在多遇地震作用下，几种不同布置形式的偏心支撑钢管混凝土框架．核心筒结构的地震响应：（1）仅设置竖向偏心支撑；（2）在框架外围加设腰连和帽连偏心支撑；（3）加设腰帽连偏心支撑和伸臂支撑．计算分析表明，在框架外围加设腰帽连偏心支撑后，尤其是当部分腰连和帽连偏心支撑与核心筒相连形成伸臂支撑时，铜管混凝土框架．核心筒结构抗震受力性能明显提高．

Elastic Time-History Analysis of Eccentrically Braced Steel Pipe Concrete Frame-Core Tube Structure

The arrangement of the vertical and lumbar （cap） eccentrically braced frame, together with the out frame of steel concrete-core tube, form a weak framework, which helps to improve the integrity of structure and seismic performance. By making comparison on the seismic response between several different kinds of allocation in eccentrically braced steel frame-core tube structures, this paper intends to reflect on the following points：（1） only set the vertical eccentric support; （2） attached with the frame peripheral lumbar （cap） eccentrically braced frame and （3） attached with the frame lumbar （cap） eccentrically braced frame and outrigger braced frame. The calculation and analysis show that the mechanical and a seismic behavior of steel concrete frame-core tube has greatly improved when attached with the frame peripheral lumbar （cap） eccentrically braced frame; What＇s more, the performance is even better when part of the lumbar （cap） eccentricallv braced frame is connected with the core-tube structure to form an outrigger frame.