Mechanical performance of bolted modular GFRP composite sandwich structures using standard and blind bolts
Mechanical performance of bolted modular GFRP composite sandwich structures using standard and blind bolts
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DOI：
10.1016/j.compstruct.2014.06.011
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发表时间：
2014-11
影响因子：
6.3
通讯作者：
Sindu Satasivam;Yu Bai
中科院分区：
文献类型：
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作者：
Sindu Satasivam;Yu Bai
本文介绍了一种用于梁板结构的GFRP腹板-翼缘夹层结构的机械螺栓模块化装配系统。由标准GFRP拉挤成型I或箱形型材组成的组合模块化截面被合并在两个GFRP板之间以形成夹层结构，然后可以在横向方向上组装以形成单向跨越板系统。通过机械螺栓连接组件型材制备模块化夹层试样，然后在四点弯曲下进行测试。承载能力进行了评估，复合作用的程度和螺栓连接的细节，如间距和类型的螺栓，进行了调查。结果表明，螺栓连接所提供的复合作用随荷载的增加而减小，在极限荷载下仅实现部分复合作用。此外，复合作用的程度还取决于锚杆间距。最后，建立了一个有限元建模方法来预测螺栓连接GFRP夹层试件的结构刚度和复合作用程度。该模型与实验结果进行了比较。
This paper presents a mechanically bolted modular assembly system of GFRP web–flange sandwich structures used for beam and slab applications. Built-up modular sections consisting of standard GFRP pultruded I or box profiles are incorporated between two GFRP plates to form a sandwich structure, which can then be assembled in the transverse direction to form a one-way spanning slab system. Modular sandwich specimens were prepared via mechanically bolting the component profiles, and were then tested under four-point bending. The load-carrying capacity was evaluated, and the degree of composite action and the detail of the bolted connections, such as the spacing and type of bolts, were investigated. It was found that the composite action offered by the bolted connections decreased with the increase of load, and only partial composite action was achieved at ultimate loads. In addition, the degree of composite action was also dependent upon the bolt spacing. Finally, a finite element modeling approach was established to predict structural stiffness and the degree of composite action of bolted GFRP sandwich specimens. The models showed good comparisons with the experimental results.