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Hysteresis modeling for cyclic behavior of concrete-steel composite joints using modified CSO

  • Yu, Yang (Centre for Infrastructure Engineering, Western Sydney University) ;
  • Samali, Bijan (Centre for Infrastructure Engineering, Western Sydney University) ;
  • Zhang, Chunwei (School of Civil Engineering, Qingdao University of Technology) ;
  • Askari, Mohsen (Centre for Infrastructure Engineering, Western Sydney University)
  • Received : 2019.05.11
  • Accepted : 2019.10.14
  • Published : 2019.10.25

Abstract

Concrete filled steel tubular (CFST) column joints with composite beams have been widely used as lateral loading resisting elements in civil infrastructure. To better utilize these innovative joints for the application of structural seismic design and analysis, it is of great importance to investigate the dynamic behavior of the joint under cyclic loading. With this aim in mind, a novel phenomenal model has been put forward in this paper, in which a Bouc-Wen hysteresis component is employed to portray the strength and stiffness deterioration phenomenon caused by increment of loading cycle. Then, a modified chicken swarm optimization algorithm was used to estimate the optimal model parameters via solving a global minimum optimization problem. Finally, the experimental data tested from five specimens subjected to cyclic loadings were used to validate the performance of the proposed model. The results effectively demonstrate that the proposed model is an easy and more realistic tool that can be used for the pre-design of CFST column joints with reduced beam section (RBS) composite beams.

Keywords

composite joint;cyclic loading;hysteresis;model identification;chicken swarm optimization

Acknowledgement

Supported by : National Natural Science Foundation of China, Australian Research Council

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