采用闭合预应力钢丝绳-聚合物砂浆加固RC框架节点技术研究
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摘要
首先评述目前国内外有关RC框架节点加固技术研究现状,指出现有节点加固方法存在的问题.在前期研究成果的基础上,提出采用闭合预应力钢丝绳加固RC框架节点的新技术,对该技术的基本思想、施工过程和技术优势进行详细阐述.为验证该加固方法的有效性,开展闭合预应力钢丝绳加固RC框架节点抗震性能试验,试验结果表明预应力钢丝绳加固RC框架节点可有效提高梁柱节点核心区受剪承载力,加固试件由对比试件的节点剪切破坏转变为梁端弯曲破坏.
Research progress on reinforcement technology for RC frame joints is reviewed,and some problems of existing reinforcement technology are pointed out.Based on the research achievement,a new technology to retrofit RC frame joints by closed prestressed steel wires is proposed.Basic thinking,technical advantages and operation course of the new reinforcement technology are presented in detail.To prove the feasibility of this reinforcement method,experimental study on seismic behavior of RC joints strengthened with prestressed closed wire rope was carried out.Test result indicates the shear capacity of joint core was improved while the failure mode of retrofitted specimen was changed from shear failure of joint core to flexural failure of beams.
Research progress on reinforcement technology for RC frame joints is reviewed,and some problems of existing reinforcement technology are pointed out.Based on the research achievement,a new technology to retrofit RC frame joints by closed prestressed steel wires is proposed.Basic thinking,technical advantages and operation course of the new reinforcement technology are presented in detail.To prove the feasibility of this reinforcement method,experimental study on seismic behavior of RC joints strengthened with prestressed closed wire rope was carried out.Test result indicates the shear capacity of joint core was improved while the failure mode of retrofitted specimen was changed from shear failure of joint core to flexural failure of beams.
引文
[1]Ghobarah A,Said A.Seismic rehabilitation of beam-column joints using FRP laminates[J].Journal of Earthquake Engineer-ing,2001,5(1):113-129.
[2]Ghobarah A,Said A.Shear strengthening of beam-column joints[J].Engineer Structures,2002,24:881-888.
[3]El-Amoury T,Ghobarah A.Seismic rehabilitation of beam-column joint using GFRP sheets[J].Engineering Structures,2002,24:1 397-1 407.
[4]陆洲导,谢莉萍,洪涛.碳纤维加固低配箍混凝土梁板柱节点的抗震试验[J].同济大学学报:自然科学版,2003,31(3):253-257.
[5]吴波,王维俊.碳纤维布加固钢筋混凝土框架节点的抗震性能试验研究[J].土木工程学报,2005,38(4):60-65.
[6]彭亚萍,王铁成,刘增夕,等.FRP抗震加固混凝土梁柱节点的受剪承载力分析[J].地震工程与工程振动,2006,(1):116-121.
[7]冼巧玲,江传良,周福霖.混凝土框架节点碳纤维布抗震加固新方法研究[J].建筑结构学报,2007,28(5),137-144.
[8]陆洲导,洪涛,谢莉萍.碳纤维加固震损混凝土框架节点抗震性能的初步研究[J].工业建筑,2003,33(2):9-12.
[9]任玉贺.粘钢加固混凝土框架节点的抗震性能研究[D].上海:同济大学,1996.
[10]马乐为,刘瑛,谢莉萍.钢筋混凝土框架中节点粘钢加固抗震性能试验研究[J].西安建筑科技大学学报,1996,28(4):414-418.
[11]彭述权,樊玲.粘钢与碳纤维布加固框架中节点对比试验研究[J].武汉理工大学学报,2007,29(11):108-111.
[12]Alcocer S M,Jirsa J O.Strength of reinforced concrete frame connections rehabilitated by jacketing[J].ACI Structural Jour-nal,1993,90(3):249-261.
[13]Shannag M J,Alhassan M A.Seismic upgrade of interior beam-column subassemblages with high-performance fiber rein-forced concrete jackets[J].ACI Structural Journal,2005,102(1):131-138.
[14]金国芳,李视令,李思明.框架节点加固的抗震性能试验研究[J].工程抗震,2000(1):14-17.
[15]余琼,李思明.柱加大截面法加固框架节点试验分析[J].工业建筑,2005,35(4):43-47
[16]余琼,陆洲导.柱加大截面加固与碳纤维加固框架节点的比较与分析[J].结构工程师,2007,23(2):90-96.
[17]余琼,李思明.柱加大截面与粘钢法加固框架节点的比较分析[J].同济大学学报:自然科学版,2003,31(10):1 157-1 162.
[18]王步,夏春红,王溥,等.碳纤维布-角钢组合加固混凝土框架节点抗震性能试验研究[J].施工技术,2006,35(4):74-78
[19]曹忠民,李爱群,王亚勇,等高强钢绞线网一聚合物砂浆抗震加固框架梁柱节点的试验研究[J],建筑结构学报,2000,27(4):235-239.
[20]徐福泉,刘敏,关建光.预应力包钢法加固框架梁柱节点的试验研究[J].建筑科学,2007,23(11):29-34.
[21]赵彤,刘明国,张景明.抗震加固方法在国外的若干新发展[J].建筑结构,2001,31(3):26-28.
[22]郭子雄,张杰,李传林.预应力钢板箍加固高轴压比框架柱抗震性能研究[J].土木工程学报,2009,42(12):112-116
[23]郭子雄,张杰,杨勇.设置外包预应力钢板箍RC短柱抗震性能研究[J].哈尔滨工业大学学报,2006,38(1):140-144.
[24]黄群贤,郭子雄,朱奇云,等.钢筋混凝土梁柱节点的加固方法:中国,CN 200910213814.2[P].2009-12-10.
[2]Ghobarah A,Said A.Shear strengthening of beam-column joints[J].Engineer Structures,2002,24:881-888.
[3]El-Amoury T,Ghobarah A.Seismic rehabilitation of beam-column joint using GFRP sheets[J].Engineering Structures,2002,24:1 397-1 407.
[4]陆洲导,谢莉萍,洪涛.碳纤维加固低配箍混凝土梁板柱节点的抗震试验[J].同济大学学报:自然科学版,2003,31(3):253-257.
[5]吴波,王维俊.碳纤维布加固钢筋混凝土框架节点的抗震性能试验研究[J].土木工程学报,2005,38(4):60-65.
[6]彭亚萍,王铁成,刘增夕,等.FRP抗震加固混凝土梁柱节点的受剪承载力分析[J].地震工程与工程振动,2006,(1):116-121.
[7]冼巧玲,江传良,周福霖.混凝土框架节点碳纤维布抗震加固新方法研究[J].建筑结构学报,2007,28(5),137-144.
[8]陆洲导,洪涛,谢莉萍.碳纤维加固震损混凝土框架节点抗震性能的初步研究[J].工业建筑,2003,33(2):9-12.
[9]任玉贺.粘钢加固混凝土框架节点的抗震性能研究[D].上海:同济大学,1996.
[10]马乐为,刘瑛,谢莉萍.钢筋混凝土框架中节点粘钢加固抗震性能试验研究[J].西安建筑科技大学学报,1996,28(4):414-418.
[11]彭述权,樊玲.粘钢与碳纤维布加固框架中节点对比试验研究[J].武汉理工大学学报,2007,29(11):108-111.
[12]Alcocer S M,Jirsa J O.Strength of reinforced concrete frame connections rehabilitated by jacketing[J].ACI Structural Jour-nal,1993,90(3):249-261.
[13]Shannag M J,Alhassan M A.Seismic upgrade of interior beam-column subassemblages with high-performance fiber rein-forced concrete jackets[J].ACI Structural Journal,2005,102(1):131-138.
[14]金国芳,李视令,李思明.框架节点加固的抗震性能试验研究[J].工程抗震,2000(1):14-17.
[15]余琼,李思明.柱加大截面法加固框架节点试验分析[J].工业建筑,2005,35(4):43-47
[16]余琼,陆洲导.柱加大截面加固与碳纤维加固框架节点的比较与分析[J].结构工程师,2007,23(2):90-96.
[17]余琼,李思明.柱加大截面与粘钢法加固框架节点的比较分析[J].同济大学学报:自然科学版,2003,31(10):1 157-1 162.
[18]王步,夏春红,王溥,等.碳纤维布-角钢组合加固混凝土框架节点抗震性能试验研究[J].施工技术,2006,35(4):74-78
[19]曹忠民,李爱群,王亚勇,等高强钢绞线网一聚合物砂浆抗震加固框架梁柱节点的试验研究[J],建筑结构学报,2000,27(4):235-239.
[20]徐福泉,刘敏,关建光.预应力包钢法加固框架梁柱节点的试验研究[J].建筑科学,2007,23(11):29-34.
[21]赵彤,刘明国,张景明.抗震加固方法在国外的若干新发展[J].建筑结构,2001,31(3):26-28.
[22]郭子雄,张杰,李传林.预应力钢板箍加固高轴压比框架柱抗震性能研究[J].土木工程学报,2009,42(12):112-116
[23]郭子雄,张杰,杨勇.设置外包预应力钢板箍RC短柱抗震性能研究[J].哈尔滨工业大学学报,2006,38(1):140-144.
[24]黄群贤,郭子雄,朱奇云,等.钢筋混凝土梁柱节点的加固方法:中国,CN 200910213814.2[P].2009-12-10.
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