肖从真  徐培福  王翠坤
    （中国建筑科学研究院  北京 100013）

[提要]  结合振动台试验现象和震害调查，对体型收进的框架结构进行了深入的计算分析和比较，研究了体型收进对高层建筑结构抗震性能的影响，对体型收进的位置、收进程度等影响因素进行了分析，并提出了带有收进的高层建筑结构设计时应注意的问题。
[关键词]  高层建筑  体型收进  抗震设计

Shaking table test and earthquake reconnaissance reports are used to illustrate the damage of step back to the behavior of structures under seismic action. Linear dynamic time analysis and nonlinear static analysis are made to study the influence factors such as position of step back and size of step back. Some advices for the seismic design for structures with step-back are given.
Keywords: step back; seismic behavior; seismic design; tall buildings; push over