Joint earthquake,wave and current action on the pile group cable-stayed bridge tower foundation: An experimental study |
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| Institution: | 1. Institute of Earthquake Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, Liaoning, 116024, China;2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning, 116024, China;1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;2. Faculty of Architectural, Civil Engineering and Environmental, Ningbo University, Ningbo 315211, China;3. Department of Bridge Engineering, Tongji University, Shanghai 200092, China;1. Division of Ocean Science and Technology, Shenzhen Graduate School, Tsinghua University, Tsinghua Campus, University Town, Shenzhen 518055, China;2. School of Naval Architecture, Dalian University of Technology, Ling Gong Road 2, Dalian 116024, China;3. POWERCHINA Huadong Engineering Corporation, Offshore Wind Power R&D Center of POWERCHINA Huadong, Hangzhou 310014, China;1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;2. Department of Bridge Engineering, Tongji University, Shanghai 200092, China;3. Faculty of Architectural, Civil Engineering and Environmental, Ningbo University, Ningbo 315211, China;1. College of Civil Engineering, Tongji University, Shanghai, 200092, China;2. Department of Bridge Engineering, Southwest Jiaotong University, Chengdu, 610031, China;3. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, 200092, China |
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| Abstract: | Sea-crossing cable-stayed bridges located in areas of active seismicity are generally subjected to earthquakes, waves, current and other dynamic loads of potential threat during their service period. The pile group foundation, which is composed of bored piles and elevated pile caps, has been applied widely for pylons to ensure the stability of cable-stayed bridge towers. Owing to its large dimensions, complexity and marked three-dimensional characteristics, it is difficult to model the precise dynamic response of the pile group pylon foundation under the joint action of various dynamic loads by means of existing theory. In this paper, an experimental study is presented for a 1/100 scale dynamic test model of a bridge tower with a grouped pile foundation. The model was designed according to elasticity-gravity similarity laws and tested using the Earthquake, Wave and Current Joint Simulation System. The structural response of the bridge tower in air and water conditions with and without incident sine waves and current was investigated. The test results may be used for engineering practice and further research. |
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| Keywords: | Bridge pylon foundation Scale model design EWCJSS Hydrodynamic pressure Collapse mechanism |
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