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External reinforcement of high strength concrete columns

机译：高强度混凝土柱的外部加固

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With the technology development on the compressive strength of concrete over the years, the use of high strength concrete has proved most popular in terms of economy, superior strength, stiffness and durability due to many advantages it could offer. However, strength and ductility are inversely proportional [J. Mater. Civil Eng. 11 (1999) 21]. High strength concrete is a brittle material causing failure to be quite sudden and 'explosive' under loads. It is also known that structural concrete columns axially compressed rarely occur in practice. The stress concentrations caused by the eccentric loading further reduce the strength and ductility of high strength concrete. Therefore, studies for high strength concrete columns under eccentric loading are essential for the practical use. This paper experimentally investigates a number of high strength concrete columns that are externally reinforced with galvanised steel straps and fibre-reinforced polymers subjected to concentric and eccentric loading. The experimental results show that external reinforcement can enhance the properties of high strength concrete columns.
机译：多年来，随着混凝土抗压强度技术的发展，高强度混凝土由于具有许多优势，因此在经济性，优异的强度，刚度和耐久性方面已被证明是最受欢迎的。然而，强度和延展性成反比[J。母校土木工程11（1999）21]。高强度混凝土是一种脆性材料，会导致负载突然失效并“爆炸”。还已知在实践中很少发生轴向压缩的结构混凝土柱。由偏心载荷引起的应力集中进一步降低了高强度混凝土的强度和延性。因此，对于偏心载荷下高强度混凝土柱的研究对于实际应用至关重要。本文通过实验研究了许多用镀锌钢带和纤维增强聚合物从外部加固的高强度混凝土柱，它们承受了同心和偏心载荷。试验结果表明，外加筋可以提高高强度混凝土柱的性能。

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