Structural Engineering and Mechanics

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Study of a self-centering beam-column joint with installed tapered steel plate links

  • Liusheng He (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University) ;
  • Yangchao Ru (Department of Disaster Mitigation for Structures, Tongji University) ;
  • Haifeng Bu (Department of Disaster Mitigation for Structures, Tongji University) ;
  • Ming Li (Department of Civil Engineering, Suzhou University of Science and Technology)
  • Received : 2021.04.07
  • Accepted : 2023.07.17
  • Published : 2023.08.25
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Abstract

In this study, a new type of self-centering beam-column joint with tapered steel plate links is proposed. Firstly, mechanical property of the basic joint (with the prestressed steel strands only, to provide the self-centering ability) and the combined joint (with both the prestressed steel strands and tapered steel plate links, to provide self-centering and energy dissipation simultaneously) is theoretically analyzed. Then, three joints with different dimensions and combinations of tapered plate links are designed and tested through a series of quasi-static cyclic loading tests. Test results show that a nearly bilinear elastic moment-rotation relationship for the basic joint is obtained. With the addition of tapered steel plate links, typical flag-shape hysteretic curves are obtained, which indicates good self-centering and energy dissipating ability of the combined joint. By installing multiple tapered plate links, stiffness and bearing capacity of the beam-column joint can be enhanced. The theoretical moment-rotation relationships agree well with the test results. A simplified macro model of the proposed joint is developed using OpenSees, which simulates reasonably well its hysteretic behavior.

Keywords

Acknowledgement

The authors are grateful for the support from National Natural Science Foundation of China under Grant No. U2239253 and the Fundamental Research Funds for the Central Universities.

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