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首页> 外文期刊>Journal of structural fire engineering >Strengthening of Heat Damaged Reinforced Concrete Short Columns
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Strengthening of Heat Damaged Reinforced Concrete Short Columns

机译：热损伤钢筋混凝土短柱的加固

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摘要

The purpose of this study was to investigate the effectiveness of different strengthening schemes in strengthening heat damaged reinforced concrete short columns. A series of 63 heat damaged specimens were tested under concentric compression after jacketing externally with High Strength Fiber Reinforced Concrete (HSFRC), Ferrocement (FC) and Glass Fiber Reinforced Polymer (GFRP) jackets. The specimens were subjected to various heating and cooling regimes. The overall response of strengthened specimens was investigated with reference to un-strengthened specimens in terms of axial compressive strength, ductility, lateral stress-strain, and axial stress-strain behaviour. It was observed that while the GFRP jacketing is quite effective in improving compressive strength and energy dissipation, it is not capable of improving stiffness. On the contrary FC and HSFRC jacketing were mainly effective in improving stiffness property. Overall GFRP jacketing was found to be the most effective method of strengthening fire or heat damaged concrete columns.
机译：这项研究的目的是研究不同的加固方案在加固受热破坏的钢筋混凝土短柱中的有效性。在用高强度纤维增强混凝土（HSFRC），铁氟橡胶（FC）和玻璃纤维增​​强聚合物（GFRP）外部包裹外套之后，在同心压缩下测试了一系列63个受热破坏的试样。样品经受各种加热和冷却方式。在轴向抗压强度，延展性，侧向应力-应变和轴向应力-应变行为方面，参照未增强的样本对增强样本的整体响应进行了研究。观察到，尽管GFRP护套在提高抗压强度和能量耗散方面非常有效，但它却不能提高刚度。相反，FC和HSFRC护套主要在改善刚度性能方面有效。总的来说，GFRP护套是增强火或热损坏混凝土柱的最有效方法。

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