Steel and Composite Structures

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Experimental and numerical study on mechanical behaviour of grouted splices with light-weight sleeves

  • Quanwei Liu (Department of Civil Engineering, Anhui University of Technology) ;
  • Tao Wu (Department of Civil Engineering, Chang'an University) ;
  • Zhengyi Kong (Institute for Sustainable Buit Environment, Heriot-Watt University) ;
  • Xi Liu (Department of Civil Engineering, Chang'an University) ;
  • Ran Chen (Department of Civil Engineering, Chang'an University) ;
  • Kangxiang Hu (Department of Civil Engineering, Anhui University of Technology) ;
  • Tengfei Xiang (Department of Civil Engineering, Anhui University of Technology) ;
  • Yingkang Zhou (Department of Civil Engineering, Anhui University of Technology)
  • Received : 2023.09.15
  • Accepted : 2024.06.24
  • Published : 2024.07.25
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Abstract

Grouted sleeve splice (GSS) is an effective type of connection applied in the precast concrete structures as it has the advantages of rapidly assembly and reliable strength. To decrease the weight and cost of vertical rebar connection in precast shear walls, a light-weight sleeve is designed according to the thick-cylinder theory. Mechanical behaviour of the light-weighted GSS is investigated through experimental analysis. Two failure modes, such as rebar fracture failure and rebar pull-out failure, are found. The load-displacement curves exhibit four different stages: elastic stage, yield stage, strengthening stage, and necking stage. The bond strength between the rebar and the grout increases gradually from outer position to inner position of the sleeve, and it reaches the maximum value at the centre of the anchorage length. A finite element model predicting the mechanical properties of the light-weighted GSS is developed based on the Concrete Damage Plasticity (CDP) model and the Brittle Cracking (BC) model. The effect of the rebar anchorage length is significant, while the increase of the thickness of sleeve and the grout strength are not very effective. A model for estimating ultimate load, including factors of inner diameter of sleeves, anchorage length, and rebar diameter, is proposed. The proposed model shows good agreement with various test data.

Keywords

Acknowledgement

The authors appreciate the support from Anhui University of Technology Foundation (No. QZ202015), Anhui Province University Research Program Project of China (No. 2023AH051086), Anhui Provincial Natural Science Foundation of China (No. 2108085QD168) and National Natural Science Foundation of China (No. 52078042).

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