炸药爆炸作用下地下结构的动力响应分析

Dynamic response analysis of underground structures under explosion-induced loads

1.
Beijing Labouratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100022, China;
2.
The Beijing Canbao Institute of Architectural Design, Beijing 100850, China

摘要: 基于显式有限元计算程序LS-DYNA3D和粘弹性人工边界条件，建立了爆腔-地下结构-软回填隔震层-岩土介质系统三维弹粘塑性动力响应分析模型，其中爆腔的模拟采用了经验关系式。通过与美陆军技术手册TM5-855-1经验公式的计算结果比较，表明该分析模型与方法是合理的。还进一步讨论了软回填层的隔震效果。
- 固体力学 /
- 爆炸 /
- 地下结构 /
- 动力响应 /
- 软回填层
Abstract: Based on the explicit FEM code LS-DYNA3D and the viscous-spring boundary, the 3D elastic-viscous-plastic dynamic response model composed of explosion cavity, an underground structure, a shock isolation material and geologic backfills were established. The empirical relation was used during the simulation of the explosion cavity. By comparing with the results of the empirical relation of technical manualsTM5-855-1 of the USA Army, it can be see that the proposed model and method are reasonable. The shock isolation effect of the crushable backpacking was also discussed.
- solid mechanics /
- explosion /
- underground structures /
- dynamic response /
- crushable backpacking