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Steel and Composite Structures
  Volume 31, Number 3, May10 2019, pages 303-317

Behaviour and design of high-strength steel beam-to-column joints
Dongxu Li, Brian Uy and Jia Wang

    This paper presents a finite element model for predicting the behaviour of high-strength steel bolted beam-tocolumn joints under monotonic loading. The developed numerical model considers the effects of material nonlinearities and geometric nonlinearities. The accuracy of the developed model is examined by comparing the predicted results with independent experimental results. It is demonstrated that the proposed model accurately predicts the ultimate flexural resistances and moment-rotation curves for high-strength steel bolted beam-to-column joints. Mechanical performance of three joint configurations with various design details is examined. A parametric study is carried out to investigate the effects of key design parameters on the behaviour of bolted beam-to-column joints with double-extended endplates. The plastic flexural capacities of the beam-to-column joints from the experimental programme and numerical analysis are compared with the current codes of practice. It is found that the initial stiffness and plastic flexural resistance of the high-strength steel beam-to-column joints are overestimated. Proper modifications need to be conducted to ensure the current analytical method can be safely used for the bolted beam-to-column joints with high-performance materials.
Key Words
    high-strength steel; beam-to-column joint; numerical analysis; design codes
School of Civil Engineering, The University of Sydney, Sydney, NSW 2006, Australia.

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