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Internal and External Reinforcement of Concrete Members by Use of Shape Memory Alloy and Fiber Reinforced Polymers under Cyclic Loading—A Review

机译:循环载荷下使用形状记忆合金和纤维增强聚合物对混凝土构件进行内部和外部增强-综述

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摘要

This paper presents a review of recent studies on reinforced concrete (RC) structural components, such as beam-column joints (BCJs). These members are internally or externally reinforced with corrosion free shape memory alloy (SMA), fiber reinforced polymers (FRP), or a combination of the two materials. Bonded FRP sheets or near surface mounted (NSM) FRP bars are used in external strengthening cases. The use of FRP and SMA materials in RC structures can offer great potential benefits including lifetime cost saving, durability, safety, and post-earthquake serviceability for RC structures. Although FRP materials are well known for their corrosion resistance, high strength-to-weight ratios, ease of application, and constructability; SMA materials as reinforcement allow the structures to regain their original shape after the termination of the load without any permanent large residual deformation. In summary, the presented literature review provides an insight into the ongoing research on the use of these materials for retrofitting or strengthening of RC structural components and the trends for future research in this area. The cost and durability are also discussed.
机译:本文介绍了有关钢筋混凝土(RC)结构构件(例如梁柱节点(BCJs))的最新研究综述。这些构件通过无腐蚀形状记忆合金(SMA),纤维增强聚合物(FRP)或两种材料的组合进行内部或外部增强。在外部加固箱中使用粘结的FRP板或近表面安装的(NSM)FRP筋。在钢筋混凝土结构中使用FRP和SMA材料可以提供巨大的潜在好处,包括节省生命周期成本,耐用性,安全性以及钢筋混凝土结构的地震后可维修性。尽管FRP材料因其耐腐蚀性,高强度重量比,易于应用和可施工性而闻名。 SMA材料作为增强材料使结构在负载终止后恢复其原始形状,而没有任何永久性的大残留变形。总而言之,本文提供的文献综述提供了有关这些材料用于钢筋混凝土结构部件的改型或加固的正在进行的研究的洞察力,以及该领域未来研究的趋势。还讨论了成本和耐用性。

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