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Seismic behaviour of ashlar stone masonry walls with enhanced mortar joints

机译：增强砂浆缝的方石砌石墙的抗震性能

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摘要

Stone masonry walls may be constructed using different types of stonework. This paper investigates the effectiveness of a technique that strengthens traditional ashlar stone masonry by embedding polymer mortar and steel bars in bed joints. The seismic behaviour of stone masonry walls with enhanced mortar joints is experimentally evaluated. Seven single-bay, single-storey wall specimens were fabricated and tested under different combinations of constant vertical loads and reversed cyclic lateral loads. One specimen was constructed using a traditional construction method; the other six specimens were constructed similarly, but their joints were strengthened with a combination of embedded polymer-based mortar and steel reinforcing bars. The influence of applied normal stress and strengthening method on the failure mode, lateral resistance, strength degradation, stiffness degradation, energy dissipation and ductility was investigated. The experimental results show that strengthening the joints effectively enhances the lateral load-carrying capacity and integrity of stone masonry walls. As expected, an increase in vertical load increased both the lateral strength and pre-peak stiffness of the tested specimens, but decreased the ductility. Within the limitation of the present tests, the failure mechanisms of the stone masonry walls were dominated by either diagonal stepped cracks or slip-shear cracks, depending on the specific strengthening method.
机译：砌石墙可以使用不同类型的石材来建造。本文研究了通过在床缝中嵌入聚合物砂浆和钢筋来增强传统方石砌体的技术的有效性。实验评估了具有增强砂浆缝的砌石墙的抗震性能。制作了七个单间，单层壁标本，并在恒定垂直载荷和反向循环侧向载荷的不同组合下进行了测试。使用传统的构造方法构造了一个标本。其他六个标本的构造类似，但是它们的接缝通过嵌入的聚合物基砂浆和钢筋加固而成。研究了施加正应力和加强方法对破坏模式，横向阻力，强度退化，刚度退化，能量耗散和延展性的影响。实验结果表明，加强节点有效地提高了砌石墙的侧向承载能力和整体性。如预期的那样，垂直载荷的增加既增加了被测样品的侧向强度，又提高了峰前刚度，但降低了延展性。在本试验的范围内，根据具体的加固方法，砌石墙的破坏机理主要是对角阶梯裂缝或滑剪裂缝。

著录项

  • 来源
    《Proceedings of the Institution of Civil Engineers》 |2019年第sb7期|469-479|共11页
  • 作者

    Liu Xiao-Juan; Guo Zi-Xiong; Ye Yong; Liu Yang; Chai Zhen-Ling; Huang Qun-Xian; Shahrooz Bahram M.;

  • 作者单位

    Huaqiao Univ, Coll Civil Engn, Xiamen, Fujian, Peoples R China|Key Lab Struct Engn & Disaster Prevent Fujian Pro, Xiamen, Fujian, Peoples R China;

    Huaqiao Univ, Coll Civil Engn, Xiamen, Fujian, Peoples R China|Key Lab Struct Engn & Disaster Prevent Fujian Pro, Xiamen, Fujian, Peoples R China;

    Huaqiao Univ, Coll Civil Engn, Xiamen, Fujian, Peoples R China|Key Lab Struct Engn & Disaster Prevent Fujian Pro, Xiamen, Fujian, Peoples R China;

    Huaqiao Univ, Coll Civil Engn, Xiamen, Fujian, Peoples R China|Key Lab Struct Engn & Disaster Prevent Fujian Pro, Xiamen, Fujian, Peoples R China;

    Huaqiao Univ, Coll Civil Engn, Xiamen, Fujian, Peoples R China|Key Lab Struct Engn & Disaster Prevent Fujian Pro, Xiamen, Fujian, Peoples R China;

    Huaqiao Univ, Coll Civil Engn, Xiamen, Fujian, Peoples R China|Key Lab Struct Engn & Disaster Prevent Fujian Pro, Xiamen, Fujian, Peoples R China;

    Huaqiao Univ, Coll Civil Engn, Xiamen, Fujian, Peoples R China|Univ Cincinnati, Dept Civil & Architectural Engn & Construct Manag, Cincinnati, OH USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    brickwork masonry; disaster engineering; safety hazards;

    机译：砌体;灾害工程;安全与危害;

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