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首页> 外文会议>Fifth International Conference on Analysis of Discontinuous Deformation, ICADD-5 Oct 6-10, 2002 Beer Sheva, Israel >Realistic dynamic analysis of jointed rock slopes using DDA
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Realistic dynamic analysis of jointed rock slopes using DDA

机译：DDA对节理岩质边坡进行真实动力分析

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摘要

A fully dynamic, two dimensional, stability analysis of a h ghly discontinuous rock slope is demonstrated in this paper using DDA. The analytically determined failure moc es of critical keyblocks are clearly predicted by DDA. However, application of a fully dynamic analysis with no damping results in unrealistically large displacements that cannot be confirmed by field studies. With introcuction of dynamic damping the calculated results can be made to match historic evidence. Our study shows that introduction of at least 5% dynamic damping is necessary to predict realistically the earthquake damage in a highly discontinuous rock slope with about 400 individual blocks. The introduction of dynamic damping is necessary to account for 2D limitations as well as for various energy loss mechanisms, which are not modeled in DDA.
机译：本文使用DDA对高度不连续的岩质边坡进行了全动态的二维稳定性分析。 DDA明确预测了关键键块的分析确定的故障模式。但是，没有阻尼的全动态分析的应用导致了不切实际的大位移，这不能通过现场研究得到证实。通过引入动态阻尼，可以得出与历史证据相匹配的计算结果。我们的研究表明，至少要引入5％的动态阻尼才能现实地预测高度不连续的，约有400个单独块岩质边坡的地震破坏。引入动态阻尼对于解决2D限制以及各种能量损失机制（在DDA中未建模）是必不可少的。

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