碳纤维布抗震加固混凝土T型节点试验
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摘要
根据碳纤维布优良的材料性能,提出了3种基于碳纤维布的节点抗震加固方法。通过6个混凝土T型外节点试件的低周反复加载试验,对所提出的3种节点抗震加固方法进行了检验和对比。试验结果表明:所采用的不同加固方法均能够有效增强节点核心区的抗剪性能,改变节点的剪切破坏模式;不同的加固方法对于节点组合体在滞回特性、延性性能以及承载力等方面抗震性能的改善效果存在各自的特点。
According to the excellent material characteristics of CFRP sheets,three seismic resistance methods based on CFRP sheets are designed for RC beam-column joints.These methods are verified by the quasi-static tests of six RC T-joints.The results show that all the tested strengthening methods are successful in enhancing the shear capacity of joint cores and changing the shear mode of failure.The strengthening effects in aspect of hysteretic characteristic,ductility and strength of beam-column joints are also different in these methods.1 tab,7 figs,10 refs.
According to the excellent material characteristics of CFRP sheets,three seismic resistance methods based on CFRP sheets are designed for RC beam-column joints.These methods are verified by the quasi-static tests of six RC T-joints.The results show that all the tested strengthening methods are successful in enhancing the shear capacity of joint cores and changing the shear mode of failure.The strengthening effects in aspect of hysteretic characteristic,ductility and strength of beam-column joints are also different in these methods.1 tab,7 figs,10 refs.
引文
[1]Gergely J,Pantelides C P,Reaveley L D.Shearstrengthening of RCT-joints using CFRP composites[J].Journal of Composites for Construction,2000,4(2):56-64.
[2]Antonopolos C P,Triantafillou T C.Experimentalinvestigation of FRP-strengthened RC beam-columnjoints[J].Journal of Composites for Construction,2003,7(1):39-49.
[3]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.LU Zhou-dao,XIE Li-ping,HONG Tao.Aseismaticresearch on beam-column-slab subassemblies reinforcedwith low ratio tranverse reinforcement rehabilitated bycarbon fiber reinforced plastic[J].Journal of TongjiUniversity:Natural Science Edition,2003,31(3):253-257.
[4]Prota A,Nanni A,Manfredi G,et al.Selective upgradeof underdesigned reinforced concrete beam-columnjoints using carbon fiber reinforced concrete[J].ACIStructure Journal,2004,101(5):699-707.
[5]王步,夏春红,王溥.碳纤维布抗震加固混凝土框架抗震性能试验研究[J].施工技术,2004,33(6):6-8.WANG Bu,XIA Chun-hong,WANG Pu.Experimentstudy on seismic behavior of RC frames upgraded byCFRP sheets[J].Construction Technology,2004,33(6):6-8.
[6]韩万水,黄平明,兰燕.轻质高强微膨胀混凝土加固拱桥的动力分析[J].长安大学学报:自然科学版,2005,25(4):44-47.HAN Wan-shui,HUANG Ping-ming,LAN Yan.Dynamic analysis of arch bridges strengthened withhigh strength micro-expansive lightweight aggregateconcrete[J].Journal of Chang’an University:Natural Science Edition,2005,25(4):44-47.
[7]Ghobarah A,El-Amoury T.Seismic rehabilitation ofdeficient exterior concrete frame joints[J].Journal ofComposites for Construction,2005,9(5):408-416.
[8]王步,王溥,夏春红.核心区外碳纤维布增强混凝土框架节点抗剪性能试验研究与机理分析[J].工业建筑,2005,35(7):29-33.WANG Bu,WANG Pu,XIA Chun-hong.Experimentinvestigation and mechanics analysis of RC beam-columnjoints shear strengthened around core by CFRP sheets[J].Industrial Construction,2005,35(7):29-33.
[9]王步,王溥,夏春红.碳纤维布增强混凝土平面框架节点抗剪性能试验研究与机理分析[J].世界地震工程,2006,22(1):157-163.WANG Bu,WANG Pu,XIA Chun-hong.Experimentresearch and mechanical analysis of shear resistance of RCbeam-column joints strengthened by CFRP sheets[J].World Earthquake Engineering,2006,22(1):157-163.
[10]JGJ 101-96,建筑抗震试验方法规程[S].
[2]Antonopolos C P,Triantafillou T C.Experimentalinvestigation of FRP-strengthened RC beam-columnjoints[J].Journal of Composites for Construction,2003,7(1):39-49.
[3]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.LU Zhou-dao,XIE Li-ping,HONG Tao.Aseismaticresearch on beam-column-slab subassemblies reinforcedwith low ratio tranverse reinforcement rehabilitated bycarbon fiber reinforced plastic[J].Journal of TongjiUniversity:Natural Science Edition,2003,31(3):253-257.
[4]Prota A,Nanni A,Manfredi G,et al.Selective upgradeof underdesigned reinforced concrete beam-columnjoints using carbon fiber reinforced concrete[J].ACIStructure Journal,2004,101(5):699-707.
[5]王步,夏春红,王溥.碳纤维布抗震加固混凝土框架抗震性能试验研究[J].施工技术,2004,33(6):6-8.WANG Bu,XIA Chun-hong,WANG Pu.Experimentstudy on seismic behavior of RC frames upgraded byCFRP sheets[J].Construction Technology,2004,33(6):6-8.
[6]韩万水,黄平明,兰燕.轻质高强微膨胀混凝土加固拱桥的动力分析[J].长安大学学报:自然科学版,2005,25(4):44-47.HAN Wan-shui,HUANG Ping-ming,LAN Yan.Dynamic analysis of arch bridges strengthened withhigh strength micro-expansive lightweight aggregateconcrete[J].Journal of Chang’an University:Natural Science Edition,2005,25(4):44-47.
[7]Ghobarah A,El-Amoury T.Seismic rehabilitation ofdeficient exterior concrete frame joints[J].Journal ofComposites for Construction,2005,9(5):408-416.
[8]王步,王溥,夏春红.核心区外碳纤维布增强混凝土框架节点抗剪性能试验研究与机理分析[J].工业建筑,2005,35(7):29-33.WANG Bu,WANG Pu,XIA Chun-hong.Experimentinvestigation and mechanics analysis of RC beam-columnjoints shear strengthened around core by CFRP sheets[J].Industrial Construction,2005,35(7):29-33.
[9]王步,王溥,夏春红.碳纤维布增强混凝土平面框架节点抗剪性能试验研究与机理分析[J].世界地震工程,2006,22(1):157-163.WANG Bu,WANG Pu,XIA Chun-hong.Experimentresearch and mechanical analysis of shear resistance of RCbeam-column joints strengthened by CFRP sheets[J].World Earthquake Engineering,2006,22(1):157-163.
[10]JGJ 101-96,建筑抗震试验方法规程[S].
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