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    樊欽鑫，劉  茵
    （中國(guó)航空規(guī)劃建設(shè)發(fā)展有限公司，北京100120）

[摘要] 中航直升機(jī)總部大樓主體結(jié)構(gòu)采用鋼筋混凝土框架一剪力墻結(jié)構(gòu)。采用MIDAS軟件建立整體模型進(jìn)行性能化研究。考慮到動(dòng)力彈塑性分析計(jì)算過程復(fù)雜，工作量較大，其結(jié)果受地震波影響顯著，因此，結(jié)合工程側(cè)向剛度較大、周期較短、基本振型為主的結(jié)構(gòu)特點(diǎn)宜對(duì)結(jié)構(gòu)進(jìn)行罕遇地震作用下的靜力彈塑性( Pushover) 分析，針對(duì)層問位移角、塑性角分布等對(duì)結(jié)構(gòu)性能評(píng)估，為設(shè)計(jì)提供依據(jù)。分析結(jié)果表明，針對(duì)該工程提出的性能化設(shè)計(jì)目標(biāo)是合理的，結(jié)構(gòu)安全性能夠得到保證。
[關(guān)鍵詞] 基于性能的抗震設(shè)計(jì)；模態(tài)Push-over分析；靜力彈塑性；能力譜；需求譜

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