粘贴CFRP砖砌体墙在低周反复荷载作用下的试验
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摘要
目的研究粘贴不同形式CFRP的砖砌体墙受剪破坏形态、抗剪承载力及延性,探讨CFRP压条锚固的可靠性.方法通过对一片未粘贴CFRP试件(W1)和三片粘贴CFRP试件进行低周反复荷载作用下的对比试验,三片粘贴CFRP试件分别为:仅水平粘贴CFRP无端部竖向压条锚固墙体(W2);水平粘贴CFRP且有端部竖向压条锚固试件(W3);"X"形粘贴CFRP且有上下水平通长压条锚固试件(W4).结果除试件W2开裂荷载下降10%外,粘贴CFRP试件开裂荷载提高71%～106%,极限荷载提高23%～77%,开裂位移提高0.86～5.48倍,极限位移提高1.23～3.34倍,开裂位移提高幅度大于极限位移提高幅度,延性系数下降,但粘贴CFRP试件仍具有很好的变形能力.结论粘贴CFRP的砖砌体墙破坏形态分别为:水平剪切破坏、劈裂破坏及受压突鼓破坏.在砖砌体墙表面粘贴CFRP能够提高墙体抗剪承载力与变形能力.CFRP压条锚固能够有效抑制被锚固CFRP的剥离,提高其工作性能.
In order to investigate the ductility and the lateral-load-carrying capacity of brick masonry walls strengthened with CFRP(Carbon Fiber Reinforced Polymer)under Low Cyclic loading and find the characteristic of brick masonry walls strengthened by CFRP in the different layouts,we do the tests of three brick masonry walls strengthened with CFRP and one brick masonry without strengthened under lowcyclic loads,show the ductility and the lateral-load-carrying capacity of the brick masonry walls strengthened with CFRP.The results show that cracking load of the specimen strengthened by CFRP without layering anchorage drops 10%,others′ cracking loads improve 71%~106% and ultimate load improve 23%~77%,cracking displacement improves 0.86~5.40 times,ultimate displacement improves 1.23~3.34 times.Cracking loads of specimens strengthened improve larger than ultimate loads.Also the ductility ratio drops,the deformation capacities of the specimens strengthened are relatively good.Hysteresis curves of the strengthened masonry walls are regular.In a word,the failure modes are horizontal failure,splitting failure and compression bulge failure.The deformation capacity and lateral-load-carrying capacity of brick masonry walls strengthened with CFRP are improved greatly and the method of CFRP layering anchorage is reliable.
In order to investigate the ductility and the lateral-load-carrying capacity of brick masonry walls strengthened with CFRP(Carbon Fiber Reinforced Polymer)under Low Cyclic loading and find the characteristic of brick masonry walls strengthened by CFRP in the different layouts,we do the tests of three brick masonry walls strengthened with CFRP and one brick masonry without strengthened under lowcyclic loads,show the ductility and the lateral-load-carrying capacity of the brick masonry walls strengthened with CFRP.The results show that cracking load of the specimen strengthened by CFRP without layering anchorage drops 10%,others′ cracking loads improve 71%~106% and ultimate load improve 23%~77%,cracking displacement improves 0.86~5.40 times,ultimate displacement improves 1.23~3.34 times.Cracking loads of specimens strengthened improve larger than ultimate loads.Also the ductility ratio drops,the deformation capacities of the specimens strengthened are relatively good.Hysteresis curves of the strengthened masonry walls are regular.In a word,the failure modes are horizontal failure,splitting failure and compression bulge failure.The deformation capacity and lateral-load-carrying capacity of brick masonry walls strengthened with CFRP are improved greatly and the method of CFRP layering anchorage is reliable.
引文
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[15]左宏亮.粘贴碳纤维布砖砌体墙在低周反复荷载作用下的有限元分析[J].沈阳大学学报:自然科学版,2010,26(2):276-281.(Zuo Hongliang.The numerical analysis of brickw alls strengthened w ith CFRP[J].Joumal of Sheny-ang University:Natueal Science,2010,26(2):276-281.)
[16]中华人民共和国建设部.JGJ101-96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.(Ministry of Housing and Urban-Rurak Developmentof the People's Republic of China.JGJ101-96 Specif-icating of test methods for earthquake resistant build-ing[S].Beijing:China Architrcture and BuildingPress,1997.)
[17]中华人民共和国建设部.G50003-2001砌体结构设计规范[S].北京:中国建筑工业出版社,2002.(Ministry of Housing and Urban-Rurak Developmentof the People's Republic of China.G50003-2001Code for design of masonry structure[S].Beijing:China Architrcture and Building Press,2002.)
[18]赵彤,碳纤维布用于砖砌体抗震加固的试验研究[J].地震工程与工程振动,2001,21(2):89-95.(Zhao Tong,Experimental study on seismic rein-forcement of brick masonry w alls w ith continous car-bon fiber sheet[J].Earthquake Engineering and En-gineering Vibration,2001,21(2):89-95)
[19]张祥顺,碳纤维加固砌体结构试验研究[J].武汉理工大学学报,2002,24(11):29-32.(Zhang Xiangshun,Experimental study of masonryw alls strengthened by CFRP[J].Journal of WuhanUniversity of Technology,2002,24(11):29-32)
[2]查支祥.我国砌体结构抗震研究现状及存在问题[J].洛阳工学院学报,2002,23(3):89-93.(Cha Zhixiang.States and questions of asesmatic re-search on our country's masonry structure[J].Jour-nal of Luoyang Institute of Technology,2002,23(3):89-93.)
[3]杨进波.碳纤维加固技术[J].海岸工程,2004,23(2):63-67.(Yang Jinbo.Reinforcing technique with carbon fi-ber reinforced fabrics[J].Coastal Engineering,2004,23(2):63-67.)
[4]Suriya P S,Alagusundaramoorthy P.Load resistanceof masonry w allettes and shear triplets retrofittedw ith GFRP composites[J].Cement and ConcreteComposites,2008,30(8):745-761.
[5]Michael L A,Alaa E E,ChengJ T.Strengtrhening ofunreinforced masonry w alls using FRP[J].Journalof Composites for Construction,2001,5(2):76-84.
[6]Corradi M,Borri A,Vignoli A.Strengthening tech-niques tested on masonry structures struck by themarche earthquake of 1997-1998[J].Constructionand Building Materials,2002,16(4):229-239.
[7]柳学花.FRP片材加固砌体结构的技术讨论[J].基建优化,2005,26(3):95-98.(Liu Xuehua.Discussion of strengthening techniqueabout masonry reinforced w ith FRP laminates[J].Opimization of Capital Construction,2005,26(3):95-98.)
[8]Wei Changqin,Zhou Xinggang,Ye Lieping.Exper-mental study of masonry w alls strengthened w ithCFRP[J].Structural Engineering and Mechanics,2007,25(6):675-690.
[9]Stradord T,Pascale G,Manfioni O,et al.Shearstrengthening masonry panels w ith sheet glass-fiberreiforced polymer[J].Joumal of for Construction,2004,8(5):434-443.
[10]Tan K H,Patorary M K H.Roger C S H,Anchoragesystems for mansonry w alls strengthened w ith FRPcomposite laminates[J].Journal of Reinforced Plas-tics and composites,2003,22(15):1353-1371.
[11]Kiang Hwee Tan,Patoary M K H,Strengthening ofmasonry w alls against out-of-plane loads using fiber-reinforced polymer reinforcement[J].Journal ofComposites for Construction,2004,8(1):79-87.
[12]Cecchi A,Milani G,Tralli A.In-plane loaded CFRPreinforced masonry w alls:mechanical characteristicsby homogenization procedures[J].Composites Sci-ence and Technology,2004,64(13/14):2097-2112.
[13]张德海.FRP约束砌体方柱轴心抗压承载力计算分析[J]沈阳建筑大学学报:自然科学版,2011,27(5):904-908.(Zhang Dehai.The calulation and analysis of axialcompressive capacity of FRP constraint masonrynonrectangnlar columns[J].Joumal of ShenyangJianzhu University:Natueal Science,2011,27(5):904-908.)
[14]张祥顺.CFRP对无构造柱墙体抗震加固试验研究[J].华中科技大学学报,2002,19(3):13-16.(Zhang Xiangshun.Experimental study of non-tec-tonic column masonry w alls strengthened by CFRP[J].Journal of Wuhan Urban Construction Institute,2002,19(13):13-16.)
[15]左宏亮.粘贴碳纤维布砖砌体墙在低周反复荷载作用下的有限元分析[J].沈阳大学学报:自然科学版,2010,26(2):276-281.(Zuo Hongliang.The numerical analysis of brickw alls strengthened w ith CFRP[J].Joumal of Sheny-ang University:Natueal Science,2010,26(2):276-281.)
[16]中华人民共和国建设部.JGJ101-96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.(Ministry of Housing and Urban-Rurak Developmentof the People's Republic of China.JGJ101-96 Specif-icating of test methods for earthquake resistant build-ing[S].Beijing:China Architrcture and BuildingPress,1997.)
[17]中华人民共和国建设部.G50003-2001砌体结构设计规范[S].北京:中国建筑工业出版社,2002.(Ministry of Housing and Urban-Rurak Developmentof the People's Republic of China.G50003-2001Code for design of masonry structure[S].Beijing:China Architrcture and Building Press,2002.)
[18]赵彤,碳纤维布用于砖砌体抗震加固的试验研究[J].地震工程与工程振动,2001,21(2):89-95.(Zhao Tong,Experimental study on seismic rein-forcement of brick masonry w alls w ith continous car-bon fiber sheet[J].Earthquake Engineering and En-gineering Vibration,2001,21(2):89-95)
[19]张祥顺,碳纤维加固砌体结构试验研究[J].武汉理工大学学报,2002,24(11):29-32.(Zhang Xiangshun,Experimental study of masonryw alls strengthened by CFRP[J].Journal of WuhanUniversity of Technology,2002,24(11):29-32)
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