摘要
介绍地震能量分析基本原理,采用非线性分析软件PERFORM-3D对6度区的某超高层建筑进行了大震作用下的动力弹塑性时程分析,研究了结构塑性变形分布规律、能量总输入与耗散分布特征以及构件间滞回耗能分配等问题,从整体结构和局部构件两个层面评价了结构的抗震性能。研究结果表明,能量分析反映了地震动持时特性对结构的影响,可以作为基于变形的抗震性能分析的较好补充;低烈度区结构在大震作用下进入塑性程度不高,能量耗散主要由阻尼耗能完成,滞回耗能主要由框架梁和跨高比大于2.5的连梁完成。
The basic principle of seismic energy analysis was introduced and nonlinear analysis software PERFORM-3D was used to carry out dynamic elasto-plastic time-history analysis for a super tall building in the region with seismic precautionary intensity of 6 degree. The distribution characteristics of plastic deformation, total energy input and dissipation, and dissipated hysteretic energy distribution between members were studied. The seismic performance of structure was evaluated from aspects of overall structure and local members. The results indicate that energy analysis, which reflects the influence of duration characteristics of earthquake ground motion on the structure, could be a good supplement to the deformation-based seismic performance analysis. Under the action of rare earthquake, plastic deformation level of the structure in the low seismic intensity region is low. The major part of energy dissipation is damping energy dissipation and the hysteretic energy dissipation is mainly provided by coupling beams with span-depth ratio of more than 2.5 and by frame beams.
出处
《建筑结构》
CSCD
北大核心
2014年第2期13-18,共6页
Building Structure
基金
重庆市科委科技攻关一般项目(CSTC
2010AB0007)
重庆市建委科技计划项目(城科字201003SS)
石河子大学优秀青年科技人才培育计划项目(2012ZRKXYQ17)
关键词
超高层建筑
弹塑性分析
塑性变形
能量分析
抗震性能
super tall building
etasto-plastic analysis
plastic deformation
energy analysis
seismic performance
