摘要
武汉国际证券大厦共68层,总高度为331.3m,结构底部为钢筋混凝土筒中筒结构过渡到上部框架-支撑钢结构,并沿高度方向设置3道水平加强层,整体结构形式复杂,纵向刚度变化大,对抗震要求较高。抗震规范要求,对于此类复杂结构的抗震分析,应采用不少于两个的不同的力学模型,故利用大型有限元计算软件ANSYS,对其进行了抗震性能分析。包括结构动力特性分析,振型分解反应谱方法和时程分析方法分析常遇地震作用下的结构的变形和内力,并将计算结果和专业软件SATWE的计算结果进行对比。计算可见建筑物刚度突变的楼层为薄弱层,需特别重视;应注意多维地震作用下的结构整体性能分析。结构符合国家现行规范要求,计算方法和结论对于运用有限元软件计算超高层建筑有借鉴价值。
Wuhan International Securities Mansion is a super high-rise steel braced frame with horizontal stiffnessstrengthened stories. The stiffness of the building varies considerably along its vertical direction, inducing complicated seismic properties. In this paper, the seismic behavior of the mansion is analyzed by using a commercial finite element software, ANSYS. The analysis includes determination of dynamic characteristics of the structure and the response of the building under small earthquakes. The calculation results, including deformations and member forces are compared with those computed from a specialized software, SATWE. Analysis results indicate that the stories with sudden change in structural stiffness show less resistance againt the earthquake and they require special attention in design. Under multidimensional earthquakes, necessary. The steel structure that has been d the analysis to determine the integrated performance of the structure is esigned conforms to the requirement of the Chinese codes.
出处
《土木工程学报》
EI
CSCD
北大核心
2006年第5期65-71,共7页
China Civil Engineering Journal
关键词
超高层钢结构
反应谱分析
时程分析
有限元
抗震
super high-rise steel structure
spectrum analysis
time-history analysis
FEA
seismic
