Seismic performance of ductile corrosion-free reinforced concrete frames

IF 1.4 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
M. Meshaly, M. Youssef, Ahmed A. Elansary
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引用次数: 0

Abstract

Corrosion of steel bars is the main cause of the deterioration of reinforced concrete (RC) structures. To avoid this problem, steel rebars can be replaced with glass-fiber-reinforced-polymer (GFRP). However, the brittle behaviour of GFRP RC elements has limited their use in many applications. The use of shape memory alloy (SMA) and/or stainless steel (SS) rebars can solve this problem, because of their ductile behaviour and corrosion resistance. However, their high price is a major obstacle. To address issues of ductility, corrosion, and cost, this paper examines the hybrid use of GFRP, SS, and SMA in RC frames. The use of SMA provides an additional advantage as it reduces seismic residual deformations. Three frames were designed. A steel RC frame, SS-GFRP RC frame, and SMA-SS-GFRP RC frame. The design criteria for the two GFRP RC frames followed previous research by the authors, which aimed at having approximately equal lateral resistance, stiffness, and ductility for GFRP and steel RC frames. The three frames were then analyzed using twenty seismic records. Their seismic performance confirmed the success of the adopted design methodology in achieving corrosion-free frames that provide adequate seismic performance.
延性无腐蚀钢筋混凝土框架的抗震性能
钢筋锈蚀是钢筋混凝土结构劣化的主要原因。为了避免这个问题,钢筋可以用玻璃纤维增强聚合物(GFRP)代替。然而,GFRP构件的脆性特性限制了其在许多应用中的应用。形状记忆合金(SMA)和/或不锈钢(SS)钢筋的使用可以解决这个问题,因为它们具有延展性和耐腐蚀性。然而,它们的高价格是一个主要障碍。为了解决延性、腐蚀和成本问题,本文研究了GFRP、SS和SMA在RC框架中的混合使用。SMA的使用还有一个额外的优势,它可以减少地震残余变形。设计了三个框架。有钢钢筋混凝土框架、SS-GFRP钢筋混凝土框架和SMA-SS-GFRP钢筋混凝土框架。两个GFRP框架的设计标准遵循了作者之前的研究,旨在使GFRP框架和钢RC框架具有近似相等的侧阻力、刚度和延性。然后使用20个地震记录对这三个框架进行分析。它们的抗震性能证实了采用的设计方法在实现提供足够抗震性能的无腐蚀框架方面的成功。
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来源期刊
AIMS Materials Science
AIMS Materials Science MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
3.60
自引率
0.00%
发文量
33
审稿时长
4 weeks
期刊介绍: AIMS Materials Science welcomes, but not limited to, the papers from the following topics: · Biological materials · Ceramics · Composite materials · Magnetic materials · Medical implant materials · New properties of materials · Nanoscience and nanotechnology · Polymers · Thin films.
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