碳纤维加固严重破坏砌体墙的试验研究
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摘要
为研究碳纤维布加固严重破坏砌体墙的有效性,开展了4片严重破坏墙体的碳纤维布加固试验,研究了试件在低周反复荷载作用下的试验性能,考查了其破坏形态和破坏特征,对比分析了墙体的承载力、延性和耗能能力等性能。研究表明:采用粘贴碳纤维布加固严重破坏墙体的方法是可行且有效的;加固后墙体的抗剪承载力、变形性能都较原墙墙体有明显提高;碳纤维布布置方法不同,对墙体的约束效果不同;碳纤维布破坏时其应变远小于其极限抗拉应变,建议碳纤维布加固严重破坏墙体时无须使用高强度的碳纤维布。
In order to testify the effectiveness of retrofitting the severely damaged masonry wall with carbon fiber reinforcement polymer(CFRP),four severely damaged masonry walls retrofitted with CFRP are provided.The test performance of specimens designed and tested under cyclic lateral load is researched,at the same time,the failure model and failure characteristic are investigated,and the strength,the ductility,and the energy dissipation are comparatively analyzed.The test data indicate that:the severely damaged masonry wall retrofitted with CFRP is effectively,and compared with the original masonry wall,the maximum horizontal load and the distortion capacity of retrofitted wall are increased significantly.Confining effect of different CFRP styles is different,and the CFRP strain of broken wall is far less than the CFRP ultimate strain.Therefore,the higher strength CFRP need not be considered when retrofitting severely damaged masonry walls.
In order to testify the effectiveness of retrofitting the severely damaged masonry wall with carbon fiber reinforcement polymer(CFRP),four severely damaged masonry walls retrofitted with CFRP are provided.The test performance of specimens designed and tested under cyclic lateral load is researched,at the same time,the failure model and failure characteristic are investigated,and the strength,the ductility,and the energy dissipation are comparatively analyzed.The test data indicate that:the severely damaged masonry wall retrofitted with CFRP is effectively,and compared with the original masonry wall,the maximum horizontal load and the distortion capacity of retrofitted wall are increased significantly.Confining effect of different CFRP styles is different,and the CFRP strain of broken wall is far less than the CFRP ultimate strain.Therefore,the higher strength CFRP need not be considered when retrofitting severely damaged masonry walls.
引文
[1]Oday Asal Salih.约束砌体墙不同修复方法的抗震性能试验研究[D].重庆:重庆大学,2010.
[2]Houssam Mohammad Agha.碳纤维布加固约束开洞砖墙抗震性能试验研究[D].重庆:重庆大学,2010.
[3]姚远.碳纤维加固严重破坏砌体墙的试验研究[D].重庆:重庆大学硕士学位论文,2010.
[4]洪峰,王绍博.砌体结构抗震抗剪强度分析[J].地震工程与工程振动,2000,20(3):28-33.
[5]张祥顺,谷倩,彭少民.CFRP对砖墙抗震加固对比试验研究与计算分析[J].世界地震工程,2003,19(1):77-82.
[6]赵彤,张晨军,谢剑,等.碳纤维布加固修复砖砌体的研究与工程实践[J].建筑结构,2002,32(3):45-49.
[7]Croci G,Ayala D,Asdia P,et al.Analysis on shear walls reinforced with fibers[C]//IABSE.Symposium on Safety and Quality Assurance of CivilEngineering Structures,Tokyo,1987.
[8]Tumialan J,Nanni A.Strengthening of masonry walls with FRP bars[J].Composites Fabricator Magazine,Arlington,VA,2002:1-9.
[9]Schwegler G.Masonry construction strengthened with fiber composites in seismically endangered zones[C]//Proceedings of the Tenth EuropeanConference on Earthquake Engineering,Rotterdam,Netherlands,1995:2299-2303.
[10]Ehsani M R,Saadatmanesh H,AL-Saidy A.Shear behavior of URM retrofitted with FFRP Overlays[J].Journal of Composites for Construction,ASCE,1997,1(1):17-25.
[11]Ehsani M R,Saadatmanesh H.Seismic retrofit of URM walls with fiber composites[J].The Masonry Society Journal,1996,14(2):63-72.
[12]Grando Miao H L.CFRP sheets application to masonry shear walls with openings[D].Master's Dissertation,Edmonton,Alberta,Canada:Univer-sity of Alberta,2005.
[13]Corradi M,Borri A,Vignoli A.Strengthening techniques tested on masonry structures Struck by the Umbra-Marche Earthquake of 1997-1998[J].Construction and Building Materials,2002,16(4):229-239.
[2]Houssam Mohammad Agha.碳纤维布加固约束开洞砖墙抗震性能试验研究[D].重庆:重庆大学,2010.
[3]姚远.碳纤维加固严重破坏砌体墙的试验研究[D].重庆:重庆大学硕士学位论文,2010.
[4]洪峰,王绍博.砌体结构抗震抗剪强度分析[J].地震工程与工程振动,2000,20(3):28-33.
[5]张祥顺,谷倩,彭少民.CFRP对砖墙抗震加固对比试验研究与计算分析[J].世界地震工程,2003,19(1):77-82.
[6]赵彤,张晨军,谢剑,等.碳纤维布加固修复砖砌体的研究与工程实践[J].建筑结构,2002,32(3):45-49.
[7]Croci G,Ayala D,Asdia P,et al.Analysis on shear walls reinforced with fibers[C]//IABSE.Symposium on Safety and Quality Assurance of CivilEngineering Structures,Tokyo,1987.
[8]Tumialan J,Nanni A.Strengthening of masonry walls with FRP bars[J].Composites Fabricator Magazine,Arlington,VA,2002:1-9.
[9]Schwegler G.Masonry construction strengthened with fiber composites in seismically endangered zones[C]//Proceedings of the Tenth EuropeanConference on Earthquake Engineering,Rotterdam,Netherlands,1995:2299-2303.
[10]Ehsani M R,Saadatmanesh H,AL-Saidy A.Shear behavior of URM retrofitted with FFRP Overlays[J].Journal of Composites for Construction,ASCE,1997,1(1):17-25.
[11]Ehsani M R,Saadatmanesh H.Seismic retrofit of URM walls with fiber composites[J].The Masonry Society Journal,1996,14(2):63-72.
[12]Grando Miao H L.CFRP sheets application to masonry shear walls with openings[D].Master's Dissertation,Edmonton,Alberta,Canada:Univer-sity of Alberta,2005.
[13]Corradi M,Borri A,Vignoli A.Strengthening techniques tested on masonry structures Struck by the Umbra-Marche Earthquake of 1997-1998[J].Construction and Building Materials,2002,16(4):229-239.
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