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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Seismic damage performance of the steel fiber reinforced face slab in the concrete-faced rockfill dam
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Seismic damage performance of the steel fiber reinforced face slab in the concrete-faced rockfill dam

机译：面板堆石坝钢纤维增强面板的抗震性能

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摘要

Damage and cracks in concrete face slabs threaten the safety of concrete-faced rockfill dams (CFRDs). The use of fiber-reinforced concrete is an effective engineering measure that prevents the formation of cracks in face slabs. However, there is little research regarding steel fiber reinforced CFRDs. In this study, dynamic elasto-plastic finite analyses were performed to investigate the performance of reinforced concrete (RC) and steel fiber reinforced concrete (SFRC) face slabs for a two-dimensional 250 m high CFRD. A widely used plastic damage model was modified to capture the influence of the fiber content on the behavior of concrete. Additionally, the rockfill material was described using a generalized plasticity model. The interfaces between the face slabs and the rockfill were modeled using a three-dimensional state-dependent elasto-plastic model. The damage development and equivalent crack width in RC and SFRC face slabs were investigated under varying intensities of ground motions. The results indicate that the damage to the SFRC face slab is much less than that of the RC face slab. The extent of the damage decreases by 23%, the range of damage decreases by 79%, and the maximum equivalent crack width decreases by 32%. The SFRC can greatly reduce the earthquake-induced damage to the face slab. Thus, SFRC face slabs can be used to improve the anti-seismic capabilities of CFRDs in meizoseismal areas.
机译：混凝土面板的损坏和裂缝威胁着混凝土面板堆石坝（CFRD）的安全。纤维增强混凝土的使用是一种有效的工程措施，可防止在面板上形成裂纹。但是，关于钢纤维增强CFRD的研究很少。在这项研究中，进行了动态弹塑性有限分析，以研究二维250 m高CFRD的钢筋混凝土（RC）和钢纤维钢筋混凝土（SFRC）面板的性能。修改了一种广泛使用的塑性损伤模型，以捕获纤维含量对混凝土性能的影响。另外，使用广义可塑性模型描述了堆石料。使用三维状态相关的弹塑性模型对面板和堆石之间的界面进行建模。在不同的地面运动强度下，研究了RC和SFRC面板的损伤发展和等效裂缝宽度。结果表明，对SFRC面板的破坏远小于RC面板的破坏。损伤程度降低了23％，损伤范围降低了79％，最大等效裂纹宽度降低了32％。 SFRC可以大大减少地震对面板的破坏。因此，SFRC面板可用于改善中震地区CFRD的抗震能力。

著录项

  • 来源
    《Soil Dynamics and Earthquake Engineering》 |2019年第4期|320-330|共11页
  • 作者

    Qu Yongqian; Zou Degao; Kong Xianjing; Liu Jingmao; Zhang Yu; Yu Xiang;

  • 作者单位

    Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Liaoning, Peoples R China|Dalian Univ Technol, Sch Hydraul Engn, Dalian 116024, Liaoning, Peoples R China;

    Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Liaoning, Peoples R China|Dalian Univ Technol, Sch Hydraul Engn, Dalian 116024, Liaoning, Peoples R China;

    Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Liaoning, Peoples R China|Dalian Univ Technol, Sch Hydraul Engn, Dalian 116024, Liaoning, Peoples R China;

    Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Liaoning, Peoples R China|Dalian Univ Technol, Sch Hydraul Engn, Dalian 116024, Liaoning, Peoples R China;

    Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Liaoning, Peoples R China|Dalian Univ Technol, Sch Hydraul Engn, Dalian 116024, Liaoning, Peoples R China;

    Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Liaoning, Peoples R China|Dalian Univ Technol, Sch Hydraul Engn, Dalian 116024, Liaoning, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Concrete-faced rockfill dam (CFRD); Steel fiber reinforced concrete; Plastic damage model; Generalized plasticity model;

    机译：混凝土面板堆石坝;钢纤维混凝土;塑性损伤模型;广义塑性模型;

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