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首页> 外文期刊>Journal of structural engineering >Tensile Behavior of Groups of Double-Headed Anchored Blind Bolts within Concrete-Filled Square Hollow Sections under Cyclic Loading
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Tensile Behavior of Groups of Double-Headed Anchored Blind Bolts within Concrete-Filled Square Hollow Sections under Cyclic Loading

机译：在循环载荷下混凝土填充方形中空部分中双头锚固盲螺栓组的拉伸行为

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摘要

In this paper, the cyclic behavior of groups of double-headed anchored blind bolts (DHABBs), which are anchored within concrete-filled square hollow sections (CFSHSs), is investigated. The DHABB used in this study consists of a conventional headed anchored blind bolt (HABB) with one additional head, between the existing end head in the embedded region and head next to the tube wall. A series of full-scale experiments were conducted on the pull-out behavior of groups of DHABBs under cyclic loading. The specimens consisted of groups of two DHABBs, four DHABBs, and four DHABBs with one through bolt (TB). The effects of load distribution between individual bolts and of internal concrete cones overlapping from individual blind bolts are also investigated. The failure mode and sequence, cracking pattern, and the strain distribution for each test are explained in detail. A comprehensive three-dimensional (3D) finite element model was developed and the results were shown to compare well with the experimental results. The finite element (FE) model was then used in parametric studies to ascertain the influence of various parameters on the behavior of blind bolted connections. The effect of tube thickness, flange and web thickness of T-stub, sizes and configurations of DHABBs, and TB and the concrete compressive strength were investigated. Among them, the flange thickness of the T-stub was found to be the parameter that has the largest effect on the tensile behavior of blind bolted connections. (C) 2020 American Society of Civil Engineers.
机译：在本文中，研究了双头锚定盲螺栓（DHABBS）的循环行为，其锚固在混凝土填充的方形中空部分（CFSHS）内。本研究中使用的DHABB由传统的头部锚固栓（HABB）组成，其中一个额外的头部，在嵌入区域中的现有端头和管壁旁边的头部之间。在循环载荷下对DHABBS组的拉出行为进行了一系列全规模实验。标本由两组Dhabbs，四个Dhabbs和四个Dhabbs组成，其中一个通过螺栓（TB）。还研究了各个螺栓和内部混凝土锥体之间的负载分布的影响，还研究了从各个盲螺栓重叠的内部混凝土锥体。详细解释了每个测试的故障模式和序列，开裂图案和裂缝模式和应变分布。开发了一种综合的三维（3D）有限元模型，结果显示结果与实验结果相比很好。然后用于参数研究中的有限元（FE）模型，以确定各种参数对盲螺栓连接行为的影响。研究了管厚度，法兰和幅材厚度的T型，尺寸和Dbbs的尺寸和构造以及Tb和混凝土抗压强度的影响。其中，发现T-stup的法兰厚度是对盲螺栓连接的拉伸行为具有最大影响的参数。 （c）2020年美国土木工程师协会。

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  • 来源
    《Journal of structural engineering》 |2021年第3期|04020349.1-04020349.17|共17页
  • 作者

    Pokharel Tilak; Goldsworthy Helen M.; Gad Emad F.;

  • 作者单位

    Swinburne Univ Technol Fac Sci Engn & Technol Swinburne Vic 3122 Australia;

    Univ Melbourne Dept Infrastruct Engn Melbourne Vic 3010 Australia;

    Swinburne Univ Technol Fac Sci Engn & Technol Swinburne Vic 3122 Australia;

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