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 (1 淮海工學院土木工程學院, 連云港 222005; 2 江蘇省郵電規(guī)劃設計院有限責任公司, 南京 210006;3 東南大學混凝土&預應力混凝土教育部結構重點實驗室, 南京 210096)

［摘要］采用基于能量概念的簡化公式確定自復位預應力預制框架（PTED）結構的目標位移。建立PTED結構的有限元分析模型，對PTED結構進行靜力彈塑性分析，驗證大震下結構的層間位移角，梁、柱連接處及柱底轉動能力能否滿足規(guī)范要求。探討PTED結構中梁的伸長效應及底層柱縱筋取值對結構受力性能的影響。研究結果表明：結構的最大層間位移角，梁、柱連接處的轉角及柱底塑性鉸滿足大震下的變形要求，結構為梁鉸耗能機制、抗震性能良好。梁伸長對梁、柱的局部受力性能影響較大，但對框架結構整體性能影響不大。在結構設計中應合理估計底層柱縱筋面積，以期得到較優(yōu)的抗震性能。

［關鍵詞］自復位； 預應力； 框架； 靜力彈塑性分析； 抗震性能

中圖分類號：TU378.8      文獻標識碼：A      文章編號：1002-848X(2015)08-0025-05

Pushover analysis of selfcentering prestressed precast frame

Cai Xiaoning1, Cheng Xianchun2, Meng Shaoping3

 (1 School of Civil Engineering, Huaihai Institute of Technology, Lianyungang 222005, China; 2 Jiangsu Posts & Telecommunications Planning and Designing Institute Co., Ltd., Nanjing 210006, China;3 Key Laboratory of Concrete & Prestressed Concrete Structures of Ministry of Education,Southeast University, Nanjing 210096, China)

Abstract:The simplified formula based on energy concept was utilized to determine the target displacement of selfcentering prestressed precast frame (PTED). The finite element analysis model of PTED structure was established and the Pushover analysis was carried out to verify if the storey drift of the structure, the rotation capacity of beamcolumn joint and bottom part of column can meet the specification requirements under the rare earthquake. The   elongation  of the beam and longitudinal reinforcement of bottom columns on the seismic performance of the structure were studied. The study results show that the storey drift of structure, the rotation angle of beamcolumn joint and plastic hinge of bottom part of column can meet the specification deformation requirements under the rare earthquake. The structure has well seismic performance with beam hinge energy dissipation mechanism. The elongation  of the beam has little effect on the overall seismic performance of the structure except local mechanical performances of some beams and columns. The longitudinal reinforcement areas of bottom columns should be estimated reasonably to get the optimal seismic performance of the structure.

Keywords: selfcentering； prestress； frame； Pushover analysis； seismic performance

*江蘇省自然科學基金資助項目(BK20130408),淮海工學院引進人才科研啟動基金項目（KQ12021）,江蘇省建設系統科技項目（2014ZD28）。

作者簡介：蔡小寧，博士，講師，Email：fenyun0801@163.com。

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