玻璃纤维复合材料“对拉”锚固砖墙抗震性能的试验研究
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摘要
通过1片未加固带壁柱砖墙和5片玻璃纤维复合材料(GFRP)加固带壁柱砖墙,其中3片采用"对拉"锚固措施,在低周往复荷载作用下进行抗震性能试验,阐述各试件的破坏特征;研究"对拉"锚固措施以及加固量对GFRP加固前后墙体的刚度及退化特性、变形性能、耗能性能等影响。研究结果表明:采用"对拉"锚固减小后期墙体刚度的衰减;"对拉"锚固对墙体变形能力有一定程度的影响,且比加固方式影响大;在极限荷载状态下,采用锚固措施对试件耗能性能的影响不明显,但在极限位移状态下,锚固措施的采用明显地改善墙体的耗能性能。
It was carried out an experimental research on seismic performance of brick masonry walls with pilaster reinforced by glass GFRP when "through –wall" anchors were used.By carrying out the experiment of six pieces of brick masonry walls with pilaster strengthened by GFRP and three pieces of masonry wall with "through –wall" anchor under low reversed cyclic loading,the failure characteristic of every wall was explained;Seismic performances such as resilience,rigidity and its degeneration,deformation,energy consumption if "through –wall" anchors were taken or not.The test results showed that using "through –wall" anchors could decrease rigidity degeneration of the wall;"through –wall" anchors had some influence on deformation of the wall,and was better than strengthening modes;Using "through –wall" anchors had little influence on energy consumption of the walls under the ultimate load,but was another thing under the ultimate displacement.
It was carried out an experimental research on seismic performance of brick masonry walls with pilaster reinforced by glass GFRP when "through –wall" anchors were used.By carrying out the experiment of six pieces of brick masonry walls with pilaster strengthened by GFRP and three pieces of masonry wall with "through –wall" anchor under low reversed cyclic loading,the failure characteristic of every wall was explained;Seismic performances such as resilience,rigidity and its degeneration,deformation,energy consumption if "through –wall" anchors were taken or not.The test results showed that using "through –wall" anchors could decrease rigidity degeneration of the wall;"through –wall" anchors had some influence on deformation of the wall,and was better than strengthening modes;Using "through –wall" anchors had little influence on energy consumption of the walls under the ultimate load,but was another thing under the ultimate displacement.
引文
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[2]王欣.纤维复合材料加固砌体墙片的抗震试验研究[D].上海:同济大学,2003.
[3]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.
[4]Albert L Michael,Elwi E Alaa,Cheng J J Roger.Strengthening ofUnreinforced Masonry Walls Using FRPs[J].Journal ofComposites for Construction,2001,5(2):76-84.
[5]林磊,叶列平.GFRP布加固砌体墙的试验研究[C]∥第二届全国土木工程用纤维增强塑料(FRP)应用技术学术交流会会议论文集.昆明:2002:215-223.
[6]陆新征.FRP-混凝土界面行为研究[D].北京:清华大学,2004.
[7]赵彤,刘明国.碳纤维布用于改善斜向受力高强混凝土柱抗震性能的研究[J].土木工程学报,2002(6):13-19.
[8]赵彤,张景明.碳纤维布改善钢筋混凝土短柱延性的试验研究[J].世界地震工程,2002(3):83-86.
[9]张伟平,欧阳煜,顾祥林,等.FRP板加固砌体结构的抗震性能试验研究[C]∥第六届全国建筑物鉴定与加固改造学术会议论文集.长沙:湖南大学出版社,2002:450-456.
[10]JGJ101—96建筑抗震试验方法规程[S].
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