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Steel and Composite Structures
  Volume 33, Number 6, December25 2019, pages 877-889

Developments of double skin composite walls using novel enhanced C-channel connectors
Jia-Bao Yan, An-Zhen Chen and Tao Wang

    The developments of double skin composite (DSC) walls with novel enhanced C-channel connectors (DSCW-EC) were reported. Followed axial compression tests on prototype walls were carried to evaluate structural performances of this novel DSC composite structures. The testing program consists of five specimens and focused on the layout of the novel enhanced C-channel (EC) connectors, which include the web direction of C-channels, steel-faceplate thickness, vertical and horizontal spacing of Cchannels. Crushing in concrete core and buckling of steel faceplate were two main observed failed modes from the compression tests. However, elastic or plastic buckling of the steel faceplate varies with designed parameters in different specimens. The influences of those investigated parameters on axial compressive behaviors of DSCW-ECs were analyzed and discussed. Recommendations on the layout of novel EC connectors were then given based on these test results and discussions. This paper also developed analytical models for predictions on ultimate compressive resistance of DSCW-ECs. Validation against the reported test results show that the developed theoretical models predict well the ultimate compressive resistance of DSCW-ECs.
Key Words
    double skin composite structure; compressive test; shear connectors; composite walls; prototype tests; analytical models; C-channel
(1) Jia-Bao Yan:
Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300350, China;
(2) Jia-Bao Yan, An-Zhen Chen:
School of Civil Engineering, Tianjin University, Tianjin 300350, China;
(3) Tao Wang:
Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, CEA, Harbin 150080, China.

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