Structural Engineering and Mechanics

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Experimental study on all-bolted joint in modularized prefabricated steel structure

  • Wu, Zhanjing (School of Architecture Engineering, Kunming University of Science and Technology) ;
  • Tao, Zhong (School of Architecture Engineering, Kunming University of Science and Technology) ;
  • Liu, Bei (School of Architecture Engineering, Kunming University of Science and Technology) ;
  • Zuo, Heng (School of Architecture Engineering, Kunming University of Science and Technology)
  • Received : 2019.07.29
  • Accepted : 2019.11.09
  • Published : 2020.03.25
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Abstract

The research study is focuses on a form of all-bolted joint with the external ring stiffening plate in the prefabricated steel structure. The components are bolted at site after being fabricated in the factory. Six specimens were tested under cyclic loading, and the effects of column axial compression ratio, concrete-filled column, beam flange sub plate, beam web angle cleats, and spliced column on the failure mode, hysteretic behavior and ductility of the joints were analyzed. The results shown that the proposed all-bolted joint with external ring stiffening plate performed high bearing capability, stable inflexibility degradation, high ductility and plump hysteretic curve. The primary failure modes were bucking at beam end, cracking at the variable section of the external ring stiffening plate, and finally welds fracturing between external ring stiffening plate and column wall. The bearing capability of the joints reduced with the axial compression ratio increased. The use of concrete-filled steel tube column can increase the bearing capability of joints. The existence of the beam flange sub plate, and beam web angle cleat improves the energy dissipation, ductility, bearing capacity and original rigidity of the joint, but also increase the stress concentration at the variable section of the external reinforcing ring plate. The proposed joints with spliced column also performed desirable integrity, large bearing capacity, initial stiffness and energy dissipation capacity for engineering application by reasonable design.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

This work was supported by the National Key R&D Program of China (Grant No. 2017YFC0703600) and the National Natural Science Foundation of China (Grant No. 51668007). Financial support from the Technology and Yunnan Earthquake Engineering Researching Center for Zhanjing wu's work at the Post-doctoral Research Station of Mechanics of Kunming University of Science and Technology, as a postdoctoral researcher, is highly appreciated.

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