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首页> 外文期刊>Advances in Structural Engineering >Seismic performance of seawater and sea sand concrete-filled ultra-high performance concrete tubes under low-cycle reversed lateral loading
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Seismic performance of seawater and sea sand concrete-filled ultra-high performance concrete tubes under low-cycle reversed lateral loading

机译：海水和海砂混凝土填充超高性能混凝土管的地震性能逆转横向载荷

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摘要

Seawater and sea sand concrete (SWSSC) filled ultra-high performance concrete (UHPC) tube (SFUHPC tube) column is a cement-based tubular composite column, which combines the excellent compressive strength and toughness of UHPC and lateral confining action from fiber reinforced polymer (FRP) hoops. The novel composite system has the potential to be used in marine engineering. The aims of this paper focus on evaluating the seismic performance of SFUHPC tube columns for being designed in costal and marine engineering. A series of low-cycle reversed lateral loading tests were conducted on five relatively large-scale specimens. FRP hoop volumetric ratio, compressive strength of filling SWSSC, and the types of FRP bar were selected as test parameters in this investigation. The failure modes, hysteretic responses and effects of main parameters were studied and discussed. SFUHPC tube columns exhibited flexural failure mode without visible spalling of the UHPC cover. It is noteworthy that the limit plastic drift ratios of all SFUHPC tube columns exceed the specified limits (0.02) in accordance to the rare earthquake requirement in seismic design code. The current study reveals that the proposed composite columns have acceptable ductility and relatively reliable lateral resistant performance for being used in the marine engineering. From the point of view of seismic performance, filling high strength SWSSC in UHPC tube is acceptable for the proposed composite system.
机译：海水和海砂混凝土（SWSSC）填充超高性能混凝土（UHPC）管（SFUHPC管）柱是一种基于水泥的管状复合柱，其结合了纤维增强聚合物的优异的抗压强度和UHPC和横向限制作用的韧性。 （FRP）箍。新型复合系统具有潜力可用于海洋工程。本文的目的侧重于评估SFUHPC管柱在昂贵和海洋工程中设计的地震性能。在五个相对大规模的样本上进行了一系列低循环逆转横向加载试验。 FRP环箍体积比，填充SWSSC的抗压强度，并选择FRP棒的类型作为该研究中的试验参数。研究并讨论了滞后模式，滞后反应和主要参数的影响。 SFUHPC管柱显示弯曲失效模式，无需可见UHPC盖板。值得注意的是，根据地震设计规范的罕见地震要求，所有SFUHPC管柱的极限塑料漂移比超过指定限制（0.02）。目前的研究表明，所提出的复合柱具有可接受的延展性和用于在海洋工程中使用的相对可靠的横向性能。从地震性能的角度来看，填充UHPC管中的高强度SWSSC对于所提出的复合系统是可以接受的。

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  • 来源
    《Advances in Structural Engineering》 |2021年第6期|1221-1234|共14页
  • 作者

    Gang Liu; Bo Shan; Dade Lai; Fucai Liu; Yan Xiao;

  • 作者单位

    College of Civil Engineering Hunan University|Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province Hunan University;

    College of Civil Engineering Hunan University|Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education Hunan University;

    Zhejiang University – University of Illinois Institute Zhejiang University;

    Guangdong Gaiteqi New Materials Technology Co. Ltd;

    Zhejiang University – University of Illinois Institute Zhejiang University;

  • 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

    composite column; fiber reinforced polymer; seawater and sea sand concrete; seismic performance; ultra high performance concrete;

    机译：复合柱;纤维增强聚合物;海水和海砂混凝土;地震性能;超高性能混凝土;

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