玄武岩纤维布加固砌体墙抗震性能试验
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摘要
通过对1个未加固砌体试件和2个玄武岩纤维布(BFRP)加固砌体试件进行拟静力试验,研究BFRP加固砌体墙的抗震性能,分析BFRP对已开裂和未开裂砌体的加固效果.研究表明:与未加固试件相比,BFRP加固试件的承载能力和变形能力明显提升,刚度和耗能能力显著改善;与BFRP加固未开裂试件对比,BFRP加固已开裂试件的承载能力稍好,但延性较差,且加载初期刚度下降更明显;BFRP改变砌体破坏形态,并能有效抑制已开裂试件的既有裂缝,提高砌体墙的抗震性能.
To study the seismic performance of basalt fiber reinforced plastics(BFRP)-strengthened masonry walls and analyze the reinforcement effect of the BFRP-reinforced and BFRP-retrofitted masonry walls,cyclic tests of one unreinforced and two BFRP-strengthened masonry specimens were carried out.The research results show that the seismic performance of the BFRP-reinforced specimen is better than the unreinforced specimen,in terms of load resistance,deformation capacity,stiffness degradation and energy dissipation.For the BFRP-retrofitted specimen,its load resistance and deformation performance is better than the one of the BFRP-reinforced specimen;but its trend of equivalent stiffness is sharper at the beginning and tends to be close later.Furthermore,BFRP changes the cracking pattern of masonry walls;the existing cracks in the BFRP-retrofitted specimen are effectively restricted.It can be concluded that the BFRP can significantly improve the seismic performance of the BFRP-strengthened masonry walls.
To study the seismic performance of basalt fiber reinforced plastics(BFRP)-strengthened masonry walls and analyze the reinforcement effect of the BFRP-reinforced and BFRP-retrofitted masonry walls,cyclic tests of one unreinforced and two BFRP-strengthened masonry specimens were carried out.The research results show that the seismic performance of the BFRP-reinforced specimen is better than the unreinforced specimen,in terms of load resistance,deformation capacity,stiffness degradation and energy dissipation.For the BFRP-retrofitted specimen,its load resistance and deformation performance is better than the one of the BFRP-reinforced specimen;but its trend of equivalent stiffness is sharper at the beginning and tends to be close later.Furthermore,BFRP changes the cracking pattern of masonry walls;the existing cracks in the BFRP-retrofitted specimen are effectively restricted.It can be concluded that the BFRP can significantly improve the seismic performance of the BFRP-strengthened masonry walls.
引文
[1]清华大学土木结构组,西南交通大学土木结构组,北京交通大学土木结构组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.
[2]韦昌芹,周新刚.CFRP加固砌体结构的试验研究[J].工程力学,2006,23(S2):150-154.
[3]林磊,叶列平.FRP加固砖砌体墙的试验研究与分析[J].建筑结构,2005,35(3):21-27.
[4]张维.CFRP加固砌体试验研究的有限元分析及受剪承载力研究[D].武汉:武汉理工大学,2007.
[5]Xu L,Zhang S,Hu X,et al.Dynamic properties and seismic responses of the masonry structure model strengthened with BFRP laminates[J].Advanced Materials Research,2012,446:3279-3286.
[6]Zhou D,Lei Z,Wang J.In-plane behavior of seismically damaged masonry walls repaired with external BFRP[J].Composite Structures,2013,102:9-19.
[7]Santa-Maria H,Alcaino P.Repair of in-plane shear damaged masonry walls with external FRP[J].Construction and Building Materials,2011,25(3):1172-1180.
[8]Xu L,Zhang S,Hu X,et al.Seismic responses of masonry structures strengthened with FRP laminates:a shaking-table study[C]//15th World Conference on Earthquake Engineering,Portugal:2012.
[9]GB 50702-2011砌体结构加固设计规范[S].北京:中国环境科学出版社,2008.
[10]GB/T 24335-2009建(构)筑物地震破坏等级划分[S].北京:中国标准出版社,2009.
[11]张文芳.砌体墙的面内受弯损坏形态及其抗震优势实例剖析[J].土木工程学报,2010,43(51):130-135.
[12]姚娜娜.工形与矩形截面砌体墙弯曲破坏的试验与分析[D].太原:太原理工大学,2013.
[13]ElGawady M,Lestuzzi P,Badoux M.Static cyclic response of masonry walls retrofitted with fiber-reinforced polymers[J].Journal of Composites for Construction,2007,11(1):50-61.
[14]JGJ 101-96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1996.
[15]Tomazevic M.Earthquake-resistant Design of Masonry Buildings[M].London:Imperial Colloge Press,1999:116-118.
[2]韦昌芹,周新刚.CFRP加固砌体结构的试验研究[J].工程力学,2006,23(S2):150-154.
[3]林磊,叶列平.FRP加固砖砌体墙的试验研究与分析[J].建筑结构,2005,35(3):21-27.
[4]张维.CFRP加固砌体试验研究的有限元分析及受剪承载力研究[D].武汉:武汉理工大学,2007.
[5]Xu L,Zhang S,Hu X,et al.Dynamic properties and seismic responses of the masonry structure model strengthened with BFRP laminates[J].Advanced Materials Research,2012,446:3279-3286.
[6]Zhou D,Lei Z,Wang J.In-plane behavior of seismically damaged masonry walls repaired with external BFRP[J].Composite Structures,2013,102:9-19.
[7]Santa-Maria H,Alcaino P.Repair of in-plane shear damaged masonry walls with external FRP[J].Construction and Building Materials,2011,25(3):1172-1180.
[8]Xu L,Zhang S,Hu X,et al.Seismic responses of masonry structures strengthened with FRP laminates:a shaking-table study[C]//15th World Conference on Earthquake Engineering,Portugal:2012.
[9]GB 50702-2011砌体结构加固设计规范[S].北京:中国环境科学出版社,2008.
[10]GB/T 24335-2009建(构)筑物地震破坏等级划分[S].北京:中国标准出版社,2009.
[11]张文芳.砌体墙的面内受弯损坏形态及其抗震优势实例剖析[J].土木工程学报,2010,43(51):130-135.
[12]姚娜娜.工形与矩形截面砌体墙弯曲破坏的试验与分析[D].太原:太原理工大学,2013.
[13]ElGawady M,Lestuzzi P,Badoux M.Static cyclic response of masonry walls retrofitted with fiber-reinforced polymers[J].Journal of Composites for Construction,2007,11(1):50-61.
[14]JGJ 101-96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1996.
[15]Tomazevic M.Earthquake-resistant Design of Masonry Buildings[M].London:Imperial Colloge Press,1999:116-118.
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