复杂高层建筑结构抗震分析与设计

复杂高层建筑的大量涌现给结构设计特别是抗震设计提出了新的挑战。为了探究复杂高层结构的抗震性能,针对某32层型钢混凝土框架-混凝土核心筒结构,选取5条实测地震动加速度时程,开展了常遇地震和罕遇地震作用下的弹塑性时程分析研究。研究结合各类有限元分析软件的特点,介绍了一种基于ETABS、SAP2000、PERFORM-3D三个有限元平台的抗震分析流程。此外,通过对比结构在不同地震动作用下的响应,分析了地震动频谱特性对结构响应的影响规律。研究表明,该结构在具有相同峰值的不同地震动作用下的响应差异较大。

Seismic Analysis and Design of Complicated High-rise Building Structure

Large number of complicated high-rise buildings appear recently ,which pose new challenges to structural de-sign especially for seismic design .To analyze the seismic performance of complicated high-rise building ,a 32 -story concrete frame and concrete core structure is analyzed using elastic-plastic time-history analysis method under frequent and rare earthquake ground motions .In the analysis ,five ground motion records are chosen .A seismic analysis process based on three finite element software ETABS , SAP2000 and PERFORM -3D respectively is carried out , in which strengths of all the three softwares are fully used .The influence of spectral properties of seismic ground motion on struc-tural response is analyzed by comparing structural responses under different ground motions .It reveals that the complicat-ed high-rise building shows large difference in response under different seismic ground motions which have same peak val-ue .Analysis results based on this process can either reflect the seismic performance of structure or greatly improve calcu-lating efficiency .