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| Comparative analysis of distribution layer structure of underground tunnels under explosive loading |
| Received:May 06, 2019 Revised:July 28, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20190506001 |
| KeyWord:underground tunnels SPH-FEM distribution layer structure sand soil foam concrete |
| Author | Institution |
| 王超申 |
湘潭大学 土木工程与力学学院, 湘潭 |
| 康道辉 |
湘潭大学 土木工程与力学学院, 湘潭 |
| 游世辉 |
枣庄学院 机电工程学院, 枣庄 |
| 谢纯凯 |
湘潭大学 土木工程与力学学院, 湘潭 |
| 曽宪任 |
湘潭大学 土木工程与力学学院, 湘潭 |
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| Abstract: |
| In order to find a distribution layer structure with better clipping effect,an explosion effect analysis model for underground tunnels was established based on a coupled smoothed particle hydrodynamics-finite element method (SPH-FEM),and 11 different simulation schemes were formed.Different tested points are located in different material distribution layer structures.The clipping ability is compared of different distribution layer structures based on measured stress peak,energy peak and displacement angel of vault vertical.Meanwhile,the tested stress peak is compared with the empirical value.The simulation results show that the sand has better clipping ability than foam concrete.The distribution layer structure is optimal for the attenuation and dispersion of the stress wave peak when the steel is added to the distribution layer in which the layers are arranged by cyclical cycle,increasing the value of the wave impedance and decreasing wave impedance ratio of adjacent materials between phases.The simulation value of the near-explosion area is in good agreement with the calculated value,which proves that the simulation has certain reliability and can provide reference for the structural design of military protection engineering. |
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