Experimental flexural behavior of SMA-FRP reinforced concrete beam

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• 作者：Adeel Zafar (1)
  Bassem Andrawes (1)
  
• 关键词：re ; centering ; shape memory alloys ; concrete ; composite ; fiber reinforced polymer ; scanning electron microscopy
• 刊名：Frontiers of Architecture and Civil Engineering in China
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：7
• 期：4
• 页码：341-355
• 全文大小：
• 作者单位：Adeel Zafar (1)
  Bassem Andrawes (1)
  
  1. Department of Civil Engineering, University of Illinois at Urbana-Champaign, Illinois, 61820, USA
  
• ISSN：1673-7512

文摘

The most critical drawback in currently used steel reinforcement in reinforced concrete (RC) structures is susceptibility to accumulation of plastic deformation under excessive loads. Many concrete structures due to damaged (yielded) steel reinforcement have undergone costly repairs and replacements. This research presents a new type of shape memory alloy (SMA)-based composite reinforcement with ability to withstand high elongation while exhibiting pseudo-elastic behavior. In this study, small diameter SMA wires are embedded in thermoset resin matrix with or without additional glass fibers to develop composite reinforcement. Manufacturing technique of new proposed composite is validated using microscopy images. The proposed SMA-FRP composite square rebars are first fabricated and then embedded in small scale concrete T-beam. 3-point bending test is conducted on manufactured RC beam using a cyclic displacement controlled regime until failure. It is found that the SMA-FRP composite reinforcement is able to enhance the performance of concrete member by providing re-centering and crack closing capability.