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Design and Analysis of Unretrofitted and Retrofitted Glulam Beams and Columns under Blast Loading

机译:爆破载荷下未经诱导血绿束梁和柱的设计与分析

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The findings of a comprehensive study involving the static and dynamic investigation of seventy unretro fitted and FRP retrofitted glulam structural elements are presented in this paper. Key observations made in the experimental program regarding material properties, effect of combined axial and out-of-plane blast loading, and strengthening strategies using FRP are used as foundation for design recommendations. Based on the experimental results, unretrofitted glulam beams and columns were shown to have no significant post-peak resistance and thus it is recommended that such members be modeled using a linear flexural resistance curve with a ductility ratio of unity. A dynamic increase factor was found to only be present in beams with no continuous or closely aligned finger-joints. In cases where the finger-joint distribution is not known, a DIF of unity is recommended. Fibre-reinforced polymers (FRP) were shown to only provide significant post-peak resistance when bidirectional fabrics were used as confinement.
机译:本文介绍了涉及静态和动态调查的综合研究的调查结果,本文介绍了七十个UnReTro装配和FRP改装的血绿结构元素。关于材料性能的实验计划中的重点观察,组合轴向和面外鼓风机的效果,以及使用FRP的加强策略用作设计建议的基础。基于实验结果,示出了未经诱导的胶石束和柱具有明显显着的峰值电阻,因此建议使用具有稳定性延展性比的线性弯曲电阻曲线进行建模。发现动态增加因子仅存在于没有连续或紧密对齐的指针的梁中。在手指关节分布未知的情况下,建议使用不同的统一性。显示纤维增强聚合物(FRP)仅当使用双向织物作为限制时,仅提供显着的峰值电阻。

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