玄武岩纤维增强材料加固砌体砖墙的抗震性能
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摘要
通过对采用混合加固方式的砌体砖墙进行加固前后的低周反复试验,研究了玄武岩纤维增强材料(BFRP)加固对砌体砖墙的加固效果,探讨了不同玄武岩纤维用量、加固前是否损伤对砌体砖墙抗震性能的影响,对比分析了不同砌体砖墙加固后的极限承载力、极限位移、滞回及骨架曲线、刚度退化、BFRP应变.结果表明:BFRP加固提高了砌体砖墙的极限承载力和抗震性能;加固后砌体砖墙的破坏形式以弯曲破坏为主,砌体的抗压强度成为砖墙抗剪承载力的主要控制因素;加固后砌体砖墙的承载力和刚度退化明显减慢.
This paper deals with the strengthening effect of basalt fiber-reinforced polymer(BFRP) for masonry walls based on the low-cyclic loading tests of masonry walls before and after the strengthening in a mixed configuration.In the investigation,first,the effects of reinforcement amount and pre-damage condition before the strengthening on the seismic performances of masonry walls are discussed.Then,the ultimate bearing capacity,ultimate drift,hysteresis and skeleton curves,stiffness degradation and BFRP strain of different strengthened walls are compared and analyzed.The results show that the strengthening with BFRP helps to improve the ultimate bearing capacity and seismic performances of masonry walls,that the strengthened specimens exhibit a flexural-dominant fai-lure mode,with the compressive strength of masonry being the main controlling factor of the shear capacity of the strengthened walls,and that the degradations of bearing capacity and stiffness of BFRP-strengthened masonry walls are both significantly postponed.
This paper deals with the strengthening effect of basalt fiber-reinforced polymer(BFRP) for masonry walls based on the low-cyclic loading tests of masonry walls before and after the strengthening in a mixed configuration.In the investigation,first,the effects of reinforcement amount and pre-damage condition before the strengthening on the seismic performances of masonry walls are discussed.Then,the ultimate bearing capacity,ultimate drift,hysteresis and skeleton curves,stiffness degradation and BFRP strain of different strengthened walls are compared and analyzed.The results show that the strengthening with BFRP helps to improve the ultimate bearing capacity and seismic performances of masonry walls,that the strengthened specimens exhibit a flexural-dominant fai-lure mode,with the compressive strength of masonry being the main controlling factor of the shear capacity of the strengthened walls,and that the degradations of bearing capacity and stiffness of BFRP-strengthened masonry walls are both significantly postponed.
引文
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[2]郭樟根,刘佳亮,孙伟民,等.FRP加固砌体结构的研究与应用[J].南京工业大学学报:自然科学版,2008,30(1):105-110.Guo Zhang-gen,Liu Jia-liang,Sun Wei-min,et al.Re-search and application of FRP reinforced masonry struc-tures[J].Journal of Nanjing University of Technology:Natural Science Edition,2008,30(1):105-110.
[3]谢剑,赵彤,李浩菊.碳纤维布加固修复混凝土小型空心砌块开裂墙体的试验研究[J].建筑结构学报,2003,24(5):36-41.Xie Jian,Zhao Tong,Li Hao-ju.Experimental study onstrengtnening and repairing cracked small-sized hollowconcrete block walls with continuous carbon fiber sheets[J].Journal of Building Structures,2003,24(5):36-41.
[4]ElGawady M A,Lestuzzi P,Badoux M.Static cyclic re-sponse of masonry walls retrofitted with fiber-reinforcedpolymers[J].Journal of Composites for Construction,2007,11(1):50-61.
[5]Capaozucca R.Experimental analysis of historic masonrywalls reinforced by CFRP under in-plane cyclic loading[J].Composite Structures,2011,94(1):277-289.
[6]Luccioni B,Rouhier V C.In-plane retrofitting of masonrypanels with fibre reinforced composite materials[J].Con-struction and Building Materials,2011,25(4):1772-1788.
[7]齐风杰,李锦文,李传校,等.连续玄武岩纤维研究综述[J].高科技纤维与应用,2006,31(2):7-13.Qi Feng-jie,Li Jin-wen,Li Chuan-xiao,et al.Summary onthe research of continuous basalt fibre[J].Hi-TechFiber&Application,2006,31(2):7-13.
[8]王明超,张佐光,孙志杰,等.连续玄武岩纤维及其复合材料耐腐蚀特性[J].北京航空航天大学学报,2006,32(10):1255-1258.Wang Ming-chao,Zhang Zuo-guang,Sun Zhi-jie,et al.Corrosion resistance characteristic of continuous basalt fi-ber and its reinforcing composites[J].Journal of BeijingUniversity of Aeronautics and Astronautics,2006,32(10):1255-1258.
[9]杨勇新,杨萌,赵颜,等.玄武岩纤维布的耐久性试验研究[J].工业建筑,2007,37(6):7-13.Yang Yong-xin,Yang Meng,Zhao Yan,et al.Experimentalstudy on durability of basaltic fiber reinforcement polymer[J].Industrial Construction,2007,37(6):7-13.
[10]余江涛,苏磊,陆洲导,等.玄武岩纤维加固震损三维混凝土框架节点抗震试验[J].同济大学学报:自然科学版,2011,39(1):18-24.Yu Jiang-tao,Su Lei,Lu Zhou-dao,et al.Experimentalstudy on BFRP reinforced predamaged concrete beam-column joints by simulated earthquake[J].Journal ofTongji University:Natural Science,2011,39(1):18-24.
[11]孙衍英,刘伊琳,胡海涛.玄武岩纤维布加固钢筋混凝土梁受力性能的研究[J].青岛理工大学学报,2010,31(1):29-32.Sun Yan-ying,Liu Yi-lin,Hu Hai-tao.Experimentalstudy on reinforced concrete beams strengthened withBFRP[J].Journal of Qingdao Technological University,2010,31(1):29-32.
[12]吴刚,顾冬生,吴智深,等.玄武岩纤维与碳纤维加固混凝土圆形柱抗震性能比较研究[J].工业建筑,2007,37(6):19-23.Wu Gang,Gu Dong-sheng,Wu Zhi-shen,et al.Compara-tive study on seiscmic performance of cicular concretecolumns strengthened with BFRP and CFRP composites[J].Industrial Construction,2007,37(6):19-23.
[13]麻建锁,白润山,蔡焕琴.玄武岩纤维加固修复木结构的研究与应用[J].建筑技术,2007,38(6):426-427.Ma Jian-suo,Bai Run-shan,Cai Huan-qin.Research andapplication of timber structure reinforcement with BFRPS[J].Architecture Technology,2007,38(6):426-427.
[14]GB/T24335—2009,建(构)筑物地震破坏等级划分[S].
[15]中华人民共和国住房与城乡建设部.地震灾后建筑鉴定与加固技术指南[M].北京:中国建筑工业出版社,2008:2-33.
[2]郭樟根,刘佳亮,孙伟民,等.FRP加固砌体结构的研究与应用[J].南京工业大学学报:自然科学版,2008,30(1):105-110.Guo Zhang-gen,Liu Jia-liang,Sun Wei-min,et al.Re-search and application of FRP reinforced masonry struc-tures[J].Journal of Nanjing University of Technology:Natural Science Edition,2008,30(1):105-110.
[3]谢剑,赵彤,李浩菊.碳纤维布加固修复混凝土小型空心砌块开裂墙体的试验研究[J].建筑结构学报,2003,24(5):36-41.Xie Jian,Zhao Tong,Li Hao-ju.Experimental study onstrengtnening and repairing cracked small-sized hollowconcrete block walls with continuous carbon fiber sheets[J].Journal of Building Structures,2003,24(5):36-41.
[4]ElGawady M A,Lestuzzi P,Badoux M.Static cyclic re-sponse of masonry walls retrofitted with fiber-reinforcedpolymers[J].Journal of Composites for Construction,2007,11(1):50-61.
[5]Capaozucca R.Experimental analysis of historic masonrywalls reinforced by CFRP under in-plane cyclic loading[J].Composite Structures,2011,94(1):277-289.
[6]Luccioni B,Rouhier V C.In-plane retrofitting of masonrypanels with fibre reinforced composite materials[J].Con-struction and Building Materials,2011,25(4):1772-1788.
[7]齐风杰,李锦文,李传校,等.连续玄武岩纤维研究综述[J].高科技纤维与应用,2006,31(2):7-13.Qi Feng-jie,Li Jin-wen,Li Chuan-xiao,et al.Summary onthe research of continuous basalt fibre[J].Hi-TechFiber&Application,2006,31(2):7-13.
[8]王明超,张佐光,孙志杰,等.连续玄武岩纤维及其复合材料耐腐蚀特性[J].北京航空航天大学学报,2006,32(10):1255-1258.Wang Ming-chao,Zhang Zuo-guang,Sun Zhi-jie,et al.Corrosion resistance characteristic of continuous basalt fi-ber and its reinforcing composites[J].Journal of BeijingUniversity of Aeronautics and Astronautics,2006,32(10):1255-1258.
[9]杨勇新,杨萌,赵颜,等.玄武岩纤维布的耐久性试验研究[J].工业建筑,2007,37(6):7-13.Yang Yong-xin,Yang Meng,Zhao Yan,et al.Experimentalstudy on durability of basaltic fiber reinforcement polymer[J].Industrial Construction,2007,37(6):7-13.
[10]余江涛,苏磊,陆洲导,等.玄武岩纤维加固震损三维混凝土框架节点抗震试验[J].同济大学学报:自然科学版,2011,39(1):18-24.Yu Jiang-tao,Su Lei,Lu Zhou-dao,et al.Experimentalstudy on BFRP reinforced predamaged concrete beam-column joints by simulated earthquake[J].Journal ofTongji University:Natural Science,2011,39(1):18-24.
[11]孙衍英,刘伊琳,胡海涛.玄武岩纤维布加固钢筋混凝土梁受力性能的研究[J].青岛理工大学学报,2010,31(1):29-32.Sun Yan-ying,Liu Yi-lin,Hu Hai-tao.Experimentalstudy on reinforced concrete beams strengthened withBFRP[J].Journal of Qingdao Technological University,2010,31(1):29-32.
[12]吴刚,顾冬生,吴智深,等.玄武岩纤维与碳纤维加固混凝土圆形柱抗震性能比较研究[J].工业建筑,2007,37(6):19-23.Wu Gang,Gu Dong-sheng,Wu Zhi-shen,et al.Compara-tive study on seiscmic performance of cicular concretecolumns strengthened with BFRP and CFRP composites[J].Industrial Construction,2007,37(6):19-23.
[13]麻建锁,白润山,蔡焕琴.玄武岩纤维加固修复木结构的研究与应用[J].建筑技术,2007,38(6):426-427.Ma Jian-suo,Bai Run-shan,Cai Huan-qin.Research andapplication of timber structure reinforcement with BFRPS[J].Architecture Technology,2007,38(6):426-427.
[14]GB/T24335—2009,建(构)筑物地震破坏等级划分[S].
[15]中华人民共和国住房与城乡建设部.地震灾后建筑鉴定与加固技术指南[M].北京:中国建筑工业出版社,2008:2-33.
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