Civil Engineering Departmental Seminar - Investigation on hydrodynamic response of cable-anchored submerged floating tunnel under wave and current
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Investigation on hydrodynamic response of cable-anchored submerged floating tunnel under wave and current
A cable-anchored submerged floating tunnel (SFT) is a new type of transportation structure consisting of traffic pipelines, anchoring systems, underwater foundations, etc. It is an immersed buoyancy bearing and anchoring system positioning system. The dynamic characteristics of the SFT and its hydrodynamic response in complex wave flow environments are related to service safety and stability. This study developed a new type of fully hydroelastic cable-anchored SFT test model and conducted similarity tests by combining experiments with finite element methods. A series of hydrodynamic model tests were conducted on a suspended tunnel based on an underwater vibration table, analyzing the hydrodynamic response of regular waves, extreme tsunamis, and local cable breakage, as well as the influence of wave parameters and structural parameters. At the same time, a bidirectional fluid structure coupling model and hydrodynamic performance analysis method for suspended tunnels under wave action were established, further supplementing the analysis of the influence laws of key parameters and local flow field information. The above research helps to enhance the understanding of the long-term safety and stability of suspended tunnels, and provides technical support for the design and application of suspended tunnels.
Keywords: submerged floating tunnel, model test, fluid-structure interaction, hydrodynamics
I am Zhongxiang Liu, Associated Professor and doctoral supervisor of Southeast University. I have selected for the Jiangsu Province Youth Talent Support Project. I graduated with a PhD from Southeast University in 2019 and have worked as a visiting scholar and postdoctoral researcher at Virginia Tech and Columbia University in the United States.
I have devoted largely to the research in intelligent monitoring and performance evaluation of structures, structural hydrodynamic analysis and control, structural fatigue analysis and design theory, novel sensing and artificial intelligent, etc. I have hosted one National Key Research and Development Project (1.6 million USD) and two projects funded by the National Natural Science Foundation of China. I have published more than 50 SCI papers. My research achievements have been applied in more than ten important projects, including damage diagnosis and structural condition assessment of the Runyang Bridge in China, Hercílio Luz Bridge in Brazil, etc. I am served as a guest editor for two SCI journals, as well as a young editorial board member for International Journal of Structural Integrity, Journal of Disaster Prevention and Reduction Engineering, Intelligent Marine Technology and Systems, and other journals.
I have participated in the compilation of 3 standards by the China Association for Standardization. Won the first prize of Jiangsu Science and Technology Award in 2022 (7/11), the special prize of China Highway Society Science and Technology Award (4/25), the special gold award of the 48th Geneva Invention Exhibition (4/4).