Influence of different combinations of impact mass and velocity with identical kinetic energy or momentum on the impact response of RC piles |
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| Institution: | 1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, 510640, PR China;2. Guangzhou Jishi Construction Group Co. Ltd, Guangzhou, 510115, PR China;3. Department of Civil Engineering, Foshan University, Foshan, 528000, PR China;4. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, 510640, PR China;1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300072, China;2. Department of Naval Architecture and Ocean Engineering, Tianjin University, Tianjin, 300072, China;1. School of Civil Engineering, Hunan University of Technology, Zhuzhou, Hunan, 412007, China;2. Key Laboratory of Safety Control of Bridge Engineering, Ministry of Education (Changsha University of Science and Technology), Changsha, Hunan, 410114, China;3. China Institute of Water Resources and Hydropower Research, Beijing, 100038, China;1. National Maritime Research Institute, 6-38-1, Shinkawa, Mitaka-shi, Tokyo, 181-0004, Japan;2. Faculty of Engineering Yokohama National University, 79-1 Tokiwadai Hodogaya-ku, Yokohama, Kanagawa, 240-8501, Japan;1. Key Laboratory of High Performance Ship Technology (Wuhan University of Technology), Ministry of Education, Wuhan, 430063, China;2. School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Wuhan, 430063, China;3. Marine Design & Research Institute of China, Shanghai, 200011, China |
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| Abstract: | Marine engineering structures may be subjected to various levels of vessel collisions, causing different degrees of damage to the RC piles. However, the influence of different combinations of impact mass and velocity under the same initial kinetic energy or momentum on the impact behavior of RC piles has not been explored. A numerical investigation of the impact responses of RC pile structures (including plumb piles and inclined pile groups) considering the material strain rate effect is carried out using the software ABAQUS/Explicit in this paper. Parametric studies are conducted based on the validated finite element models of RC piles subjected to horizontal impact. The internal force distributions, as well as the effect of the impact kinetic energy and the momentum (including different combinations of impact mass and initial velocity) on the impact response of RC piles, are discussed. The results indicate that the development path of the bending moment‒overall structural displacement curves in the plastic hinge regions of RC piles are almost identical under both impact and static loading conditions. Compared to momentum, the impact response of RC piles is insensitive to the variation of impact kinetic energy with different combinations of impact mass and velocity. Therefore, the impact kinetic energy is more suitable for evaluating the structural deformation of RC piles after impact. Finally, a performance-based impact-resistance design framework for RC piles is proposed. |
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| Keywords: | horizontal impact Inclined pile Kinetic energy Momentum Bending moment Finite element model |
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