Steel and Composite Structures

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Structural behavior of sandwich composite wall with truss connectors under compression

  • Qin, Ying (Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University) ;
  • Chen, Xin (School of Civil Engineering, Southeast University) ;
  • Zhu, Xingyu (School of Civil Engineering, Southeast University) ;
  • Xi, Wang (School of Civil Engineering, Southeast University) ;
  • Chen, Yuanze (School of Civil Engineering, Southeast University)
  • Received : 2019.11.23
  • Accepted : 2020.03.04
  • Published : 2020.04.25
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Abstract

Sandwich composite wall consists of concrete core attached by two external steel faceplates. It combines the advantage of steel and concrete. The appropriate composite action between steel faceplate and concrete core is achieved by using adequate mechanical connectors. This research studied the compressive behavior of the sandwich composite walls using steel trusses to bond the steel faceplates to concrete infill. Four short specimens with different wall width and thickness of steel faceplate were designed and tested under axial compression. The test results were comprehensively evaluated in terms of failure modes, load versus axial and lateral deformation responses, resistance, stiffness, ductility, strength index, and strain distribution. The test results showed that all specimens exhibited high resistance and good ductility. Truss connectors offer better restraint to walls with thinner faceplates and smaller wall width. In addition, increasing faceplate thickness is more effective in improving the ultimate resistance and axial stiffness of the wall.

Keywords

Acknowledgement

Supported by : Natural Science Foundation of Jiangsu

This work is sponsored by the Natural Science Foundation of Jiangsu Province (Grant No. BK20170685), and the National Key Research and Development Program of China (Grant No. 2017YFC0703802). The authors would like to thank the Zhejiang Southeast Space Frame Group Company Limited for the supply of test specimens, and Xiongliang Zhou, Weigang Chen, Yunfei He and Jianwei Ni for their assistance with the specimen fabrication.

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