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Seismic strengthening of shear critical post-heated circular concrete columns wrapped with FRP composite jackets

机译：FRP复合外套包裹的抗剪临界后加热圆形混凝土柱的抗震加固

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摘要

An experimental study was carried out to investigate the seismic performance of post-heated circular reinforced concrete columns wrapped with glass or carbon fibre reinforced polymer jackets. Eight shear critical reinforced circular columns with a shear span-to-depth ratio of 2.5 were tested under a combined constant axial and cyclic lateral displacement history, simulating earthquake loading. The columns were tested in three groups, unheated, post-heated and post-heated repaired with either glass fibre reinforced polymer (GFRP) or carbon fibre reinforced polymer (CFRP). In terms of seismic performance the test results indicated that using GFRP or CFRP jackets significantly increased the shear capacity, ductility and energy dissipation of the post-heated damaged columns. However, the GFRP or CFRP did not increase the stiffness of the post-heated damaged columns. It was found that the unheated and post-heated damaged columns failed in a brittle shear mode while the mode of failure of posted-heated columns repaired with GFRP or CFRP was successfully shifted from a shear to a ductile flexural failure.
机译：进行了一项实验研究，以研究包裹有玻璃纤维或碳纤维增强聚合物外套的后加热圆形钢筋混凝土柱的抗震性能。在恒定的轴向和循环侧向位移历史组合下，模拟地震荷载，测试了八根剪切跨度与深度之比为2.5的抗剪加固圆形圆柱。将该色谱柱分为三组进行测试，分别用玻璃纤维增​​强聚合物（GFRP）或碳纤维增强聚合物（CFRP）修复，不加热，后加热和后加热。在抗震性能方面，测试结果表明，使用GFRP或CFRP护套可以显着提高后加热损坏柱的剪切能力，延展性和能量耗散。但是，GFRP或CFRP并没有增加后加热损坏柱的刚度。发现未加热和后加热的受损柱在脆性剪切模式下失效，而用GFRP或CFRP修复的后加热柱的失效模式成功地从剪切转变为延性挠曲破坏。

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  • 来源
    《Composite Structures》 |2012年第3期|p.851-864|共14页
  • 作者

    C.G. Bailey; M. Yaqub;

  • 作者单位

    Faculty of Engineering and Physical Sciences, The University of Manchester, UK;

    University of Engineering & Technology, Taxila, Pakistan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    columns; heat; FRP; cyclic load;

    机译：列;热;玻璃钢;循环负荷;

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