【摘要】 昆明新国际机场主航站楼A区为复杂大跨钢-混凝土组合结构,位于抗震设防烈度为8度的昆明市,经多方论证最终对该结构采用了基础隔震技术,建成后它将成为目前世界上最大的单体隔震建筑。本文采用ANSYS有限元程序建立结构分析模型,模型主要由非线性杆单元、壳单元和非线性的隔震单元组成。首先介绍了隔震方案的论证过程及隔震支座的布置对结构隔震效能的影响,然后介绍了用于时程分析的地震波的选取过程,最后通过多遇和罕遇烈度下的弹性时程分析,研究了该结构的变形、内力和隔震效果。计算结果表明,该结构不仅可以实现小震下"降一度"的减震目标,还可以满足大震下隔震层最大剪切位移的控制指标,隔震层的设计是合理的,结构在隔震后的抗震性能是可以满足要求的。更多还原

【Abstract】 Building No.A of Kunming New International Airport is a complex steel-concrete hybrid structure.The airport is located in Kunming which seismic fortification intensity is 8 degree.By multi-analysis,base isolation technique is applied to the structure,and the building of airport will be the biggest monomer building in the world after its accomplishment.Using ANSYS,the structural analysis model,mainly composed of linear beams,linear shells and nonlinear isolators,is established.Demonstration of isolation scheme and influence of isolator’s layout to the isolation efficiency is firstly introduced.And the selection processes of earthquake waves are introduced.Finally,the elastic time history analysis is carried out to study the seismic behavior and isolation efficiency of the structure under the frequent and rare intensity earthquakes.The results show that not only the cushioning goal of ’reduce 1 degree’under frequent earthquakes is achieved,but also the maximal shear displacement of isolator under rare earthquakes can pass the code requirements.The design of isolation layer is appropriate.The seismic performance of the structure after applying isolation technique can meet the challenge.更多还原