樊钦鑫，刘  茵
    （中国航空规划建设发展有限公司，北京100120）

[摘要] 中航直升机总部大楼主体结构采用钢筋混凝土框架一剪力墙结构。采用MIDAS软件建立整体模型进行性能化研究。考虑到动力弹塑性分析计算过程复杂，工作量较大，其结果受地震波影响显著，因此，结合工程侧向刚度较大、周期较短、基本振型为主的结构特点宜对结构进行罕遇地震作用下的静力弹塑性( Pushover) 分析，针对层问位移角、塑性角分布等对结构性能评估，为设计提供依据。分析结果表明，针对该工程提出的性能化设计目标是合理的，结构安全性能够得到保证。
[关键词] 基于性能的抗震设计；模态Push-over分析；静力弹塑性；能力谱；需求谱

Seismic performance evaluation of China National Aviation Helicopter Headquarters Building based on Push-over analysis
Fan Qinxin, Liu Yin
( China Aviation Planning and Construction Development Co., Ltd., Beijing 100120, China)

Abstract: China National Aviation Helicopter Headquarters Building is the frame-shear wall structure. The whole structure was built to conduct structural performance design by using MIDAS software, and the nonlinear time-history analysis was complicated and time-consuming and analytical result tended to highly sensitive to the earthquake input. The static elastic-plastic ultimate seismic analysis (Push-over analysis) were conducted by considering relatively stiff structures in the short to intermediate period range and the fundamental mode donunates the structure's dynamic seisrmc response. The performance curve, the inter-formational displacement, and the distribution ofplastic hinge were calculated and analyzed, which can provide foundation for design. As shown in the results, the objective of performance design is reasonable for this project, and the structure is ensured safely.
Keywords: performance-based seismic design; modal pushover analysis; static elastoplastic; capacity spectrum; demand spectrum