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首页> 外文期刊>Composite Structures >Retrofitting seismically damaged steel sections encased concrete composite walls using externally bonded CFRP strips
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Retrofitting seismically damaged steel sections encased concrete composite walls using externally bonded CFRP strips

机译：改造地震损坏的钢部件使用外部键合的CFRP条带来了混凝土复合墙

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摘要

Concrete shear wall encased with steel sections were widely used in high rise buildings due to its high lateral stiffness, ductility, and energy dissipation capacity. However, to date, little studies were conducted on retrofitting seismically damaged steel-concrete composite (SCC) walls to recover their lateral load resisting capacity. One of the possible retrofitting methods is to use Carbon Fiber Reinforced Polymers (CFRP) strips to retrofit SCC walls after earthquake. However, its efficiency was unclear. For this purpose, four SCC walls were first tested to failure under cyclic lateral loads with subsequently repairmen and re-testing aiming to investigate the efficiency of this retrofitting technique. The load causing the first crack, crack pattern, yield load, and peak load were measured and compared. It was found that replacing buckled rebar and applying proper CFRP repairing scheme could fully recover the seismic resistance of damaged SCC walls. However, purely rely on CFRP repairing schemes without buckled rebar replacement will not achieve full recover of the capacity of the SCC walls. However, specimens retrofitted by CFRP schemes alone can delay the process of strength and stiffness degradation than that of counterpart without retrofitting, which resulted in enhancement of relatively larger drift ratio.
机译：由于其高侧刚度，延展性和能量耗散能力，用钢部分包裹的混凝土剪力墙广泛用于高层建筑。然而，迄今为止，在改造地震损坏的钢混凝土复合物（SCC）壁上进行了小型研究，以回收它们的横向载荷能力。其中一种可能的改装方法是使用碳纤维增强聚合物（CFRP）条在地震后改造SCC壁。但是，它的效率尚不清楚。为此目的，首先在循环横向载荷下测试四个SCC壁，随后进行修理并重新测试，旨在研究这种改装技术的效率。测量并比较了引起第一裂缝，裂纹图案，屈服负荷和峰值负荷的负荷。有人发现，更换弯曲的钢筋和应用适当的CFRP修复方案可以充分恢复受损的SCC墙壁的地震抗性。但是，纯粹依靠CFRP修复方案，没有搭扣钢筋更换将无法实现SCC墙壁的容量完全恢复。然而，单独的CFRP方案改造的标本可以延迟强度和刚度降解的过程，而不是对应物而没有改装的方法，这导致增强相对较大的漂移比。

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  • 来源
    《Composite Structures》 |2020年第3期|111927.1-111927.15|共15页
  • 作者

    Sun Fang-Jin; Pang Shao-Hua; Zhang Zhong-Wen; Fu Feng; Qian Kai;

  • 作者单位

    Guilin Univ Technol Coll Civil Engn & Architecture Guilin 541004 Peoples R China;

    Guangxi Hualan Design Co LTD Nanhua Dong Rd Nanning 514500 Peoples R China;

    Southeast Univ Sch Civil Engn Nanjing 211189 Peoples R China;

    Guilin Univ Technol Coll Civil Engn & Architecture Guilin 541004 Peoples R China|City Univ London Sch Math Comp Sci & Engn Civil Engn London EC1V 0HB England;

    Guilin Univ Technol Coll Civil Engn & Architecture Guilin 541004 Peoples R China;

  • 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

    Steel-concrete composite; Structural wall; Seismic; CFRP; Repair;

    机译：钢混凝土复合材料;结构墙;地震;CFRP;修理;

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