預應力管樁柱下單樁基礎(chǔ)對框架抗震性能的影響
任彧
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（福建省建筑設計研究院，福州 350001）［摘要］為研究預應力管樁柱下單樁基礎(chǔ)對框架結(jié)構(gòu)抗震性能的影響，根據(jù)結(jié)構(gòu)的實際構(gòu)造做法，建立了精確的分析模型。Pushover分析結(jié)果表明，地梁未經(jīng)加強的單樁基礎(chǔ)框架在強震作用下的延性較常規(guī)框架結(jié)構(gòu)顯著下降。結(jié)構(gòu)將最終因地梁層承載能力的過早耗盡而失效。將地梁層作為主要耗能構(gòu)件進行加強是單樁框架抗震設計的關(guān)鍵所在。［關(guān)鍵詞］預應力管樁柱下單樁基礎(chǔ)；Pushover分析；地梁層Seismic design of the frame based on the single PHC pileRen Yu (Fujian Architecture Design & Research Institution, Fuzhou 350001, China)Abstract:In order to study the seismic performance of the RC frame based on the single PHC pile, the accurate analysis model is established according to the actual mode of construction. The results of Pushover analysis show that the ductility of the frame based on the single PHC pile declines obviously. The structural collapse is caused by the exhaustion of the bearing capacity of the base-beams. The strengthening of base-beams, which are considered as main members to dissipate earthquake energy, are found to be key factors affecting the seismic design of the frame based on the single PHC pile.Keywords:single PHC pile; Pushover analysis; base-beam作者簡介：任彧，高級工程師，一級注冊結(jié)構(gòu)工程師，注冊咨詢工程師，Email:fzrenyu@21cn.com。參考文獻［1］愛德華·L·威爾遜. 結(jié)構(gòu)靜力與動力分析［M］.北京：中國建筑工業(yè)出版社，2006.［2］ETABS中文版使用指南［M］.北京：中國建筑工業(yè)出版社，2006.［3］王亞勇，戴國瑩. 建筑抗震設計規(guī)范疑問解答［M］.北京：中國建筑工業(yè)出版社，2006.
