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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evaluation of Train Travel Inside Submerged Floating Tunnel Under Wave Loads
https://orcid.org/https://orcid.org/0000-0002-4478-3890
Railway trains are an efficient mode of transportation for passengers and goods in large quantities. The planning of railway lines, however, needs to take the complex terrain into account. For areas with land parcels separated by wide and deep water bodies, the railway connection is even more challenging. Submerged floating tunnels (SFTs), on the other hand, become an appealing option to connect the separated land parcels. They utilize the natural water buoyancy to support the weight and payloads of the structure and traffic. They have a much lower dependency on the seabed conditions as opposed to their bottom-founded counterparts. They are also submerged at a certain depth below the water surface, which reduces the wave loads acting on the structure and provides a navigation clearance for passing vessels. Owing to the numerous advantages of such structural systems, they have attracted interest among both researchers and engineers. However, the research on the use of such transport infrastructure for safe and comfortable train travel is limited. In this paper, the dynamic responses of a train traveling across an SFT subjected to wave loads are examined. The SFT is modeled as a slender beam according to the Euler–Bernoulli beam theory. The hydrodynamic responses of the SFT subjected to various wave conditions are analyzed using SIMA/RIFLEX. Then, the responses are extracted as input to a train model idealized as a multi-body system for the calculation of the vehicle dynamics. This study aims to propose a computationally efficient method for the evaluation of the safety and comfort of train travel inside an SFT in an environmentally exposed location. Results show that travel rides inside SFTs are generally good under the normal design operational conditions. When the sea conditions are rough, limiting the operational train speeds may be necessary as the vertical acceleration is approaching 0.6 m/s2. Under extreme sea conditions, the SFTs should be closed to traffic.
Evaluation of Train Travel Inside Submerged Floating Tunnel Under Wave Loads
https://orcid.org/https://orcid.org/0000-0002-4478-3890
Railway trains are an efficient mode of transportation for passengers and goods in large quantities. The planning of railway lines, however, needs to take the complex terrain into account. For areas with land parcels separated by wide and deep water bodies, the railway connection is even more challenging. Submerged floating tunnels (SFTs), on the other hand, become an appealing option to connect the separated land parcels. They utilize the natural water buoyancy to support the weight and payloads of the structure and traffic. They have a much lower dependency on the seabed conditions as opposed to their bottom-founded counterparts. They are also submerged at a certain depth below the water surface, which reduces the wave loads acting on the structure and provides a navigation clearance for passing vessels. Owing to the numerous advantages of such structural systems, they have attracted interest among both researchers and engineers. However, the research on the use of such transport infrastructure for safe and comfortable train travel is limited. In this paper, the dynamic responses of a train traveling across an SFT subjected to wave loads are examined. The SFT is modeled as a slender beam according to the Euler–Bernoulli beam theory. The hydrodynamic responses of the SFT subjected to various wave conditions are analyzed using SIMA/RIFLEX. Then, the responses are extracted as input to a train model idealized as a multi-body system for the calculation of the vehicle dynamics. This study aims to propose a computationally efficient method for the evaluation of the safety and comfort of train travel inside an SFT in an environmentally exposed location. Results show that travel rides inside SFTs are generally good under the normal design operational conditions. When the sea conditions are rough, limiting the operational train speeds may be necessary as the vertical acceleration is approaching 0.6 m/s2. Under extreme sea conditions, the SFTs should be closed to traffic.
Evaluation of Train Travel Inside Submerged Floating Tunnel Under Wave Loads
https://orcid.org/https://orcid.org/0000-0002-4478-3890
Railway trains are an efficient mode of transportation for passengers and goods in large quantities. The planning of railway lines, however, needs to take the complex terrain into account. For areas with land parcels separated by wide and deep water bodies, the railway connection is even more challenging. Submerged floating tunnels (SFTs), on the other hand, become an appealing option to connect the separated land parcels. They utilize the natural water buoyancy to support the weight and payloads of the structure and traffic. They have a much lower dependency on the seabed conditions as opposed to their bottom-founded counterparts. They are also submerged at a certain depth below the water surface, which reduces the wave loads acting on the structure and provides a navigation clearance for passing vessels. Owing to the numerous advantages of such structural systems, they have attracted interest among both researchers and engineers. However, the research on the use of such transport infrastructure for safe and comfortable train travel is limited. In this paper, the dynamic responses of a train traveling across an SFT subjected to wave loads are examined. The SFT is modeled as a slender beam according to the Euler–Bernoulli beam theory. The hydrodynamic responses of the SFT subjected to various wave conditions are analyzed using SIMA/RIFLEX. Then, the responses are extracted as input to a train model idealized as a multi-body system for the calculation of the vehicle dynamics. This study aims to propose a computationally efficient method for the evaluation of the safety and comfort of train travel inside an SFT in an environmentally exposed location. Results show that travel rides inside SFTs are generally good under the normal design operational conditions. When the sea conditions are rough, limiting the operational train speeds may be necessary as the vertical acceleration is approaching 0.6 m/s2. Under extreme sea conditions, the SFTs should be closed to traffic.
Evaluation of Train Travel Inside Submerged Floating Tunnel Under Wave Loads
Lecture Notes in Civil Engineering
Kioumarsi, Mahdi (Herausgeber:in) / Shafei, Behrouz (Herausgeber:in) / Dai, Jian (Autor:in) / Acharya, Paban (Autor:in)
The International Conference on Net-Zero Civil Infrastructures: Innovations in Materials, Structures, and Management Practices (NTZR) ; 2024 ; Oslo, Norway
The 1st International Conference on Net-Zero Built Environment ; Kapitel: 98 ; 1173-1183
09.01.2025
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Hydrodynamic Pressure on Submerged Floating Tunnel under the P-Wave
| British Library Conference Proceedings | 2017