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Axial compressive behaviour of concrete strengthened with steel rings, wire mesh and modified high strength mortar (MHSM)

机译：钢环加固混凝土轴向压缩行为，丝网和改良高强度砂浆（MHSM）

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This paper presents an investigation on the axial compression behaviour of concrete strengthened with an innovative composite, which comprises relatively high strength steel rings, wire mesh and modified high strength mortar (MHSM). In total, 38 cylindrical specimens divided into three groups were tested. The parameters studied are the ring spacing and the number of mesh layers. The results show that this composite can effectively improve the load carrying capacity, deformation capacity, ductility and energy absorption of the strengthened concrete specimens. The axial compression behaviour is predominantly governed by steel rings. As a secondary confinement, wire mesh markedly enhances ductility. The results indicate that MHSM has significant influence on the ultimate load and concrete strengthened with sufficient amount of wire mesh is potentially comparable to that with a low steel volumetric ratio. It was observed that steel rings did not reach the yield stress at the second peak load. Different models for predicting the ultimate load are discussed. The proposed empirical models provide prediction with reasonable accuracy. (C) 2020 Elsevier Ltd. All rights reserved.
机译：本文提出了一种采用创新复合材料强化混凝土轴向压缩性能的研究，包括相对高的强度钢环，丝网和改性高强度砂浆（MHSM）。总共有38个圆柱形样品，分为三组。研究的参数是环距和网格层的数量。结果表明，该复合材料可有效提高加强混凝土样本的承载能力，变形容量，延展性和能量吸收。轴向压缩行为主要受钢环管辖。作为二次限制，丝网显着增强了延展性。结果表明，MHSM对具有足够量的金属丝网电增强的极限载荷和混凝土具有显着影响，电线网可能与具有低钢体积比的含量相当。观察到钢环在第二峰值负荷下没有达到屈服应力。讨论了用于预测最终负载的不同模型。所提出的经验模型提供了具有合理准确性的预测。 （c）2020 elestvier有限公司保留所有权利。

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