| 爆炸荷载作用下地下结构与围岩动力相互作用研究 |
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| 引用本文： | 孙惠香,许金余.爆炸荷载作用下地下结构与围岩动力相互作用研究[J].土木工程学报,2011(Z2). |
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| 作者姓名： | 孙惠香 许金余 |
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| 作者单位： | 空军工程大学;西北工业大学; |
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| 基金项目： | 陕西省自然科学基金(SJ08E210) |
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| 摘 要： | 爆炸荷载作用下结构的动力响应一直是热点的研究课题,但是对于地下支护结构与围岩在爆炸荷载作用下的相互作用机理研究还很少。爆炸荷载属于破坏荷载,用实验方法进行研究存在很大的困难,因此应用ANSYS/LS-DYNA非线性显式动力学有限元程序,采用流固耦合算法,对爆炸荷载作用下地下拱形结构与围岩的相互作用进行研究。研究结果表明:质点振幅和破碎区的大小与经验公式计算的数据基本吻合;不同TNT装药条件下,对于跨度较小(6m)的拱形支护结构,均发生剪切破坏形态,拱肩处峰值压力最大,成为结构受力的薄弱环节,设计中应采取加强措施。
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| 关 键 词： | 爆炸荷载 地下支护结构 数值模拟 动力相互作用 |
Dynamic action study between structure and rock of underground structure subjected to blast load |
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| Sun Huixiang Xu Jinyu.Dynamic action study between structure and rock of underground structure subjected to blast load[J].China Civil Engineering Journal,2011(Z2). |
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| Authors: | Sun Huixiang Xu Jinyu |
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| Affiliation: | Sun Huixiang1 Xu Jinyu1,2 (1.Air Force Engineering University,Xi'an 710038,China,2.Northwestern Polytechnical University,Xi'an 710000,China) |
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| Abstract: | The dynamic response of structure subjected to blasting has been studied by many researchers.However,researches on the interaction between underground supporting structure and surrounding rock under blasting can rarely be found.Such interaction is difficult to be studied using experimental techniques because of the destructive load.In this paper,the nonlinear dynamic finite element procedure of ANSYS/LS-DYNA is used and the fluid-solid coupling algorithm is selected to study the dynamic interaction mechanis... |
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| Keywords: | explosive load underground supporting structure numerical simulation dynamic action each other |
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