Joint earthquake, wave and current action on the pile group cable-stayed bridge tower foundation: An experimental study. (February 2017)

• Record Type: Journal Article
• Authors: Liu, Chunguang; Zhang, Shibo; Hao, Ertong
• Is Part Of: Applied ocean research. Volume 63(2017:Oct.)
• Page Start: 157
• Page End: 169
• Publication Date: 2017-02
• Subjects: Bridge pylon foundation -- Scale model design -- EWCJSS -- Hydrodynamic pressure -- Collapse mechanism; Ocean engineering -- Periodicals; 620.416205
• DOI: 10.1016/j.apor.2017.01.008
• Languages: English
• ISSNs: 0141-1187

Abstract

Highlights: Similarity laws for elasticity and gravity but ignores similarity in hydrodynamics, and some processing techniques were used to design a cable-stayed bridge tower foundation model with a scale ratio of 1/100. A series of model tests with a scale ratio of 1/100 have been carried out in the unique Earthquake, Wave and Current Joint Simulation System facility. Investigated the acceleration at the top of the model and the hydrodynamic pressure distribution under the individual and joint action of earthquakes, waves and current, and dynamic characteristics and collapse mechanism of the bridge pylon foundation model. 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.