Moving Safety Evaluation of High-speed Train on Post-earthquake Bridge Utilizing Real-time Hybrid Simulation

ABSTRACT

This study aimed to provide an experimental evaluation method for train’s moving safety on a post-earthquake bridge. First, an improved real-time hybrid simulation (RTHS) framework was constructed, based on utilizing the moving load superposition algorithm to solve the train-track-bridge interaction (TTBI) problem. An RTHS test was then conducted for the TTBI problem. The train model was tested using a shake table and was dynamically linked to the numerical substructure. A post-earthquake seven-span high-speed railway simply supported bridge was studied, in which earthquake-induced damage, such as stiffness reductions, residual displacements of piers, girder gap expansions, and pier settlements were all tested.

KEYWORDS:

• Moving safety evaluation
• real-time hybrid simulation
• moving load superposition algorithm
• high-speed railway bridge
• earthquake-induced damage
• pier settlement

Acknowledgments

The authors are grateful for the financial support from the National Natural Science Foundation of China (Project No. 51878674, 51878563). Any opinions, findings, conclusions, or recommendations expressed in this paper are those of the authors.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [Project No. 51878674, 51878563 and 52022113].