DOI QR코드

DOI QR Code

Concrete-steel bond-slip behavior of recycled concrete: Experimental investigation

  • Ren, Rui (School of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Qi, Liangjie (School of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Xue, Jianyang (School of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Zhang, Xin (School of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Ma, Hui (School of Civil Engineering and Architecture, Xi'an University of Technology) ;
  • Liu, Xiguang (School of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Ozbakkaloglu, Togay (Ingram School of Engineering, Texas State University)
  • 투고 : 2020.03.01
  • 심사 : 2021.01.20
  • 발행 : 2021.02.10

초록

In order to study the interfacial bond-slip behavior of steel reinforced recycled concrete (SRRC) under cyclic loading, thirteen specimens were designed and tested under cyclic loading and one under monotonic loading. The test results indicated that the average bond strength of SRRC decreased with the increasing replacement ratio of recycled concrete, whereas the bond strength increased with an increase in the concrete cover thickness, the volumetric stirrup ratio, and the strength of recycled concrete. The ultimate bond strength of the cyclically-loaded specimen was significantly (41%) lower than that of the companion monotonically-loaded specimen. The cyclic phenomena also showed that SRRC specimens went through the nonslip phase, initial slip phase, failure phase, bond strength degradation phase and residual phase, with all specimens exhibiting basically the same shape of the bond-slip curve. Additionally, the paper presents the equations that were developed to calculate the characteristic bond strength of SRRC, which were verified based on experimental results.

키워드

과제정보

This work was supported by the National Natural Science Foundation of China (Grant No. 51608435), the Key R&D Program in Shaanxi Province (Grant No. 2020SF-392), the Natural Science Basic Research Program of Shaanxi Province (Grant No. 2020JQ-659) and the Science and Technology Project of Yulin City (Grant No. CXY-2020-062).

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