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| Numerical research on anti-explosion capacity of foam concrete composite structure in underground openings under close-in explosion |
| Received:December 18, 2017 Revised:January 25, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20171218003 |
| KeyWord:underground caverns foam concrete anti-blast design numerical simulation |
| Author | Institution |
| 陈锐林 |
莆田学院 土木工程学院, 莆田 ;湘潭大学 土木工程与力学学院, 湘潭 |
| 董琪 |
湘潭大学 土木工程与力学学院, 湘潭 |
| 禹兵兵 |
湘潭大学 土木工程与力学学院, 湘潭 |
| 李康 |
湘潭大学 土木工程与力学学院, 湘潭 |
| 张文宽 |
湘潭大学 土木工程与力学学院, 湘潭 |
| 陈秀华 |
湘潭大学 土木工程与力学学院, 湘潭 |
| 张秀成 |
莆田学院 土木工程学院, 莆田 |
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| Abstract: |
| In order to study the antiknock performance of underground caverns with a foam concrete composite structure under near an explosion,the explosion effect of TNT explosives-surrounding rock-anchor-lining structure-air was established based on a nonlinear finite element LS-DYNA model.ALE multi-material fluid-solid coupling algorithm was used to analyze and compare the stress,air layer pressure and displacement of the important control points of a tunnel with an ordinary lining structure and a lining structure with a foam concrete interlayer.Measured point peak stresses and TM5-855-1 empirical formula are in good agreement.The reliability of the numerical simulation is proved.The numerical results show that the foam concrete sandwich can effectively reduce the propagation of blast shock wave,reduce the peak pressure of air inside the chamber,reduce the damage of overpressure to human organs and improve the survival probability of internal personnel in the chamber,compared with ordinary concrete sandwich.Linings with a foam concrete interlayer need to reinforce the stiffness of the dome area to reduce the relative displacement difference between the top and bottom panels.The research results can provide a reference for anti-explosion design of underground caverns. |
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