Smart Structures and Systems

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A real-time hybrid testing method for vehicle-bridge coupling systems

  • Guoshan Xu (School of Civil Engineering, Harbin Institute of Technology) ;
  • Yutong Jiang (School of Civil Engineering, Harbin Institute of Technology) ;
  • Xizhan Ning (College of Civil Engineering, Huaqiao University) ;
  • Zhipeng Liu (School of Civil Engineering, Harbin Institute of Technology)
  • Received : 2023.01.26
  • Accepted : 2023.11.30
  • Published : 2024.01.25
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Abstract

The investigation on vehicle-bridge coupling system (VBCS) is crucial in bridge design, bridge condition evaluation, and vehicle overload control. A real-time hybrid testing (RTHT) method for VBCS (RTHT-VBCS) is proposed in this paper for accurately and economically disclosing the dynamic performance of VBCSs. In the proposed method, one of the carriages is chosen as the experimental substructure loaded by servo-hydraulic actuator loading system in the laboratory, and the remaining carriages as well as the bridge structure are chosen as the numerical substructure numerically simulated in one computer. The numerical substructure and the experimental substructure are synchronized at their coupling points in terms of force equilibrium and deformation compatibility. Compared to the traditional iteration experimental method and the numerical simulation method, the proposed RTHT-VBCS method could not only obtain the dynamic response of VBCS, but also economically analyze various working conditions. Firstly, the theory of RTHT-VBCS is proposed. Secondly, numerical models of VBCS for RTHT method are presented. Finally, the feasibility and accuracy of the RTHT-VBCS are preliminarily validated by real-time hybrid simulations (RTHSs). It is shown that, the proposed RTHT-VBCS is feasible and shows great advantages over the traditional methods, and the proposed models can effectively represent the VBCS for RTHT method in terms of the force equilibrium and deformation compatibility at the coupling point. It is shown that the results of the single-degree-of-freedom model and the train vehicle model are match well with the referenced results. The RTHS results preliminarily prove the effectiveness and accuracy of the proposed RTHT-VBCS.

Keywords

Acknowledgement

The National Natural Science Foundation of China (Grant Nos. 52078150, 51978213, 51908231) and the National Key Research and Development Program of China (Grant Nos. 2017YFC0703605, 2016YFC0701106) are greatly acknowledged for supporting the investigation of this paper.

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