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Experimental and numerical simulation study on fracture properties of self-compacting rubberized concrete slabs

机译：自压橡胶混凝土板骨折性能实验与数值模拟研究

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摘要

The limited availability of raw materials and increasing service demands for pavements pose a unique challenge in terms of pavement design and concrete material selection. The self-compacting rubberized concrete (SCRC) can be used in pavement design. The SCRC pavement slab has advantages of excellent toughness, anti-fatigue and convenient construction. On the premise of satisfying the strength, the SCRC can increase the ductility of pavement slab. The aim of this investigation is proposing a new method to predict the crack growth and flexural capacity of large-scale SCRC slabs. The mechanical properties of SCRC are obtained from experiments on small-scale SCRC specimens. With the increasing of the specimen depth, the bearing capacity of SCRC beams decreases at the same initial crack-depth ratio. By constructing extended finite element method (XFEM) models, crack growth and flexural capacity of large-scale SCRC slabs with different fracture types and force conditions can be predicted. Considering the diversity of fracture types and force conditions of the concrete pavement slab, the corresponding test was used to verify the reliability of the prediction model. The crack growth and flexural capacity of SCRC slabs can be obtained from XFEM models. It is convenient to conduct the experiment and can save cost.
机译：在路面设计和混凝土材料选择方面，原材料的有限可用性和越来越多的服务需求对人行道的需求具有独特的挑战。自压式橡胶混凝土（SCRC）可用于路面设计。 SCRC路面板具有优异的韧性，抗疲劳和方便的结构。在满足强度的前提下，SCRC可以增加路面板的延展性。本调查的目的在提出一种预测大规模SCRC板坯的裂纹生长和抗弯能力的新方法。 SCRC的机械性能从小规模SCRC样本的实验获得。随着试样深度的增加，SCRC光束的承载能力以相同的初始裂纹深度比降低。通过构建扩展有限元方法（XFEM）模型，可以预测具有不同骨折类型和力条件的大型SCRC板的裂纹生长和弯曲能力。考虑到混凝土路面板块的断裂类型和力条件的多样性，使用相应的测试来验证预测模型的可靠性。 SCRC板坯的裂纹生长和弯曲能力可以从XFEM型号获得。进行实验方便，可以节省成本。

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  • 来源
    《Computers & Concrete》 |2019年第4期|283-293|共11页
  • 作者

    Wang Jiajia; Chen Xudong; Bu Jingwu; Guo Shengshan;

  • 作者单位

    Hohai Univ State Key Lab Hydrol Water Resources & Hydraul En Nanjing 210098 Jiangsu Peoples R China|Hohai Univ Coll Civil & Transportat Engn Nanjing 210098 Jiangsu Peoples R China;

    Hohai Univ Coll Civil & Transportat Engn Nanjing 210098 Jiangsu Peoples R China;

    Hohai Univ State Key Lab Hydrol Water Resources & Hydraul En Nanjing 210098 Jiangsu Peoples R China|Yangzhou Univ Coll Hydraul & Energy Power Engn Yangzhou 225009 Jiangsu Peoples R China;

    China Inst Water Resources & Hydropower Res Beijing 100048 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    self-compacting rubberized concrete (SCRC); crack growth; flexural capacity; extended finite element method (XFEM);

    机译：自压橡胶混凝土（SCRC）;裂纹增长;弯曲能力;延长有限元法（XFEM）;

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