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Post-cracking strength and ductility of glass-GFRP composite beams

机译：玻璃纤维增​​强复合材料梁的开裂后强度和延性

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摘要

This paper presents results of experimental and numerical investigations on the structural behaviour of composite beams made of annealed glass panes and glass fibre reinforced polymer (GFRP) pultruded profiles. The main goal of the transparent structural solutions presented here is to increase the post-cracking residual strength and ductility of glass by using GFRP strengthening laminates. The experimental programme included (i) tensile tests on double lap joints between glass and GFRP pultruded laminates, bonded with different types of structural adhesives, and (ii) full-scale flexural tests on glass beams and glass-GFRP composite beams, with different strengthening geometries and structural adhesives. Results obtained in this study show that, unlike glass beams, in glass-GFRP composite beams it is possible to obtain relatively ductile failure modes, with a significant increase of both strength and deformation capacity after the initial cracking of glass. The stiffness of the structural adhesive used, together with the geometry of the GFRP strengthening element, have a major influence on the structural response of the composite beams. Finite element models were developed for all tested beams, allowing to simulate their serviceability behaviour (prior to glass cracking) with fairly good accuracy, namely in what concerns the degree of shear interaction at the bonded interfaces.
机译：本文介绍了由退火玻璃板和玻璃纤维增​​强聚合物（GFRP）拉挤型材制成的复合梁的结构性能的实验和数值研究结果。这里介绍的透明结构解决方案的主要目标是通过使用GFRP增强层压板来增加玻璃开裂后的残余强度和延展性。实验程序包括（i）对玻璃和GFRP拉挤层压板之间的双搭接接头进行拉伸测试，并用不同类型的结构粘合剂粘结；以及（ii）对玻璃梁和玻璃纤维-GFRP复合梁进行不同强度的全尺寸挠曲测试几何形状和结构粘合剂。这项研究获得的结果表明，与玻璃梁不同，在玻璃纤维增​​强玻璃纤维复合材料梁中，可以获得较易延展的破坏模式，并且在玻璃初始破裂后强度和变形能力都将显着提高。所使用的结构胶的刚度，以及GFRP加固元件的几何形状，对复合梁的结构响应产生重大影响。针对所有测试梁开发了有限元模型，从而可以相当不错的精度模拟其可使用性行为（在玻璃开裂之前），即涉及粘结界面处的剪力相互作用的程度。

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  • 来源
    《Composite Structures》 |2011年第9期|p.2299-2309|共11页
  • 作者

    Joao R. Correia; Luis Valarinho; Fernando A. Branco;

  • 作者单位

    Civil Engineering and Architecture Department, Institute Superior Tecnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisboa, Portugal;

    Civil Engineering and Architecture Department, Institute Superior Tecnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisboa, Portugal;

    Civil Engineering and Architecture Department, Institute Superior Tecnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisboa, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    glass; GFRP; composite beams; ductility; residual post-cracking strength;

    机译：玻璃;GFRP;复合梁延展性残余开裂后强度;

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