高位连体机场塔台结构抗震性能数值分析

Numerical Analysis on Seismic Performance of an Airport Control Tower with Connecting Top Floors

针对某具有高位连接体的机场空管塔台设计方案,采用通用有限元分析软件ANSYS建立了较为精细的数值模型,对其进行了线弹性阶段的模态分析、反应谱分析和多条地震波作用下的弹性时程分析,以及两种侧向力分布模式下的弹塑性静力推覆分析,并采用改进的能力谱法对结构在不同水准下的抗震性能进行了初步评价,从而为该设计方案的合理性和可行性提供参考。结果表明,尽管连接体的存在对局部应力产生了一定不利影响,但结构总体偏刚且满足规范的各项要求。

Based on a design proposal of an airport control tower with connecting top floors, a precise numeri- cal model was constructed by using general finite element analysis software ANSYS. In oder to provide a refer- ence to the reasonability and feasibility of the design proposal, modal analysis, response spectral analysis, e- lastic time-history analysis and static elasto-plastie pushover analysis using two kinds of lateral load pattern were carryed out, and the multi-level seismic performance ability of the structure was evaluated by improved capacity spectrum method. The results of the analysis demonstrate that although connecting floors produce cer- tain adverse effects on local stress, the overall structre shows enough stiffness and meets the requirements of the code.