FRP约束混凝土矩形短柱的延性分析
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摘要
将已有混凝土柱延性的定义、纤维截面模型及等效塑性铰方法应用于纤维增强复合材料(FRP)约束矩形混凝土试件的延性分析,通过FRP约束矩形混凝土应力-应变关系考虑FRP约束的影响,计算结果与试验结果符合较好。同时,对FRP约束混凝土矩形柱延性的主要影响参数进行了分析,该方法可以进一步用于FRP约束混凝土试件延性的定量参数研究。
The ductility of FRP-confined rectangular concrete columns was analyzed with the existing ductility definition,the fiber section model and the equivalent plastic hinge method.The stress-stain relationship model of FRP-confined rectangular concrete was employed in ductility analysis of columns confined with FRP.The predicted results were shown to be agreeable to the experimental ones.Simultaneously,the investigation was carried out to analyze the influence of main parameters of the FRP-confined concrete rectangular column on its ductility.The method may be further used in quantitative parameter research on the FRP-confined concrete columns ductility.
The ductility of FRP-confined rectangular concrete columns was analyzed with the existing ductility definition,the fiber section model and the equivalent plastic hinge method.The stress-stain relationship model of FRP-confined rectangular concrete was employed in ductility analysis of columns confined with FRP.The predicted results were shown to be agreeable to the experimental ones.Simultaneously,the investigation was carried out to analyze the influence of main parameters of the FRP-confined concrete rectangular column on its ductility.The method may be further used in quantitative parameter research on the FRP-confined concrete columns ductility.
引文
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[11]魏洋,吴刚,吴智深,等.CFRP加固混凝土短方柱抗震性能试验研究[J].工程抗震与加固改造,2007,29(1):33-38.
[12]张国军,吕西林,刘伯权.轴压比超限时框架柱的恢复力模型研究[J].建筑结构学报,2006,27(1):90-98.
[2]吴刚,吕志涛,蒋剑彪.碳纤维布加固钢筋混凝土柱抗震性能的试验研究[J].建筑结构,2002,32(10):42-45.
[3]吴刚,吕志涛.纤维增强复合材料FRP约束混凝土矩形柱应力-应变关系的研究[J].建筑结构学报,2004,25(3):99-106.
[4]魏洋,吴刚,吴智深,等.FRP约束混凝土矩形柱有软化段时的应力-应变关系研究[J].土木工程学报,2008,41(3):21-28.
[5]Paulay T,Priestley MJ N.钢筋混凝土和砌体结构的抗震设计[M].戴瑞同,等译.北京:中国建筑工业出版社,1999.
[6]Priestley MJ N,Seible F,Calvi G M.Seismic design and retrofit of bridge structures[M].New York:John wiley&Sons,1996.
[7]Kowalsky MJ,Priestley MJ N,Seible F.Shear and flexural behaviour of lightweight concrete bridge columns in seismic region[J].ACI Struct.J.,1999,96(1):136-148.
[8]熊朝晖,潘德恩.钢筋混凝土框架柱侧向变形能力的研究[J].地震工程与工程振动,2001,21(2):103-108.
[9]Sause R,Harries K A,Walkup S L,et al.Flexural behaviour of concrete columns retrofitted with carbon fiber-reinforced polymer jackets[J].ACI Struct.J.,2004,101(5):708-716.
[10]Watson S,Zahn F,Park R.Confining reinforcement for concrete columns[J].Journal of Structural Engineering,ASCE,1994,120(6):1798-1824.
[11]魏洋,吴刚,吴智深,等.CFRP加固混凝土短方柱抗震性能试验研究[J].工程抗震与加固改造,2007,29(1):33-38.
[12]张国军,吕西林,刘伯权.轴压比超限时框架柱的恢复力模型研究[J].建筑结构学报,2006,27(1):90-98.
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