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Static and dynamic stability analysis using 3D-DDA with incision body scheme

ISSN号：1671-3664
期刊名称：《地震工程与工程振动：英文版》
时间：0
分类：TU457[建筑科学—岩土工程;建筑科学—土工工程]
作者机构：[1]School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116023, China
相关基金：Supported by： Key Program of National Natural Science Foundation of China Under Grant No.90510018 and Natural Science Foundation of Liaoning Province of China Under Grant No.20041077.

关键词：岩土工程, 切割体, 断续变形分析, 稳定性, 接触检测, Discontinuous deformation analysis, stability analysis, contact detection, rock engineering.

中文摘要：

不连续的变丑分析(DDA ) 为不连续的媒介的分析提供一个强大的数字工具。这个方法广泛地被用于不连续的变丑的 2D 分析。然而，它从分析为 polyhedra 主要由于可靠 3D 接触察觉算法的缺乏设计问题的 3D 岩石被妨碍。接触察觉是在 3-D DDA 分析的一把钥匙。存在接触察觉计划的限制和优点在这篇论文，和一条新途径被讨论，叫了切口身体(IB ) ，被建议，考虑存在方法的优点。计算机代码 3DIB，把 IB 计划用作一个 3D 接触察觉算法，与视觉 C~(++) 被规划。为三个现实主义的工程问题的静电干扰和动态稳定性分析被执行了。而且，焦点在在连接岩石基础和一个折断的重力坝题目的动态稳定性上学习一个重力坝的稳定性到地震摇晃上。program3DIB 和切口身体策划的模拟结果表演能够正确地检测 3D 块接触并且因此模仿开结束并且连接的块群众的滑坡过程。另外，代码 3DIBcould 为评估 3D 水坝结构的安全提供一个有效工具，它为设计问题是相当重要的。

英文摘要：

Discontinuous deformation analysis （DDA） provides a powerful numerical tool for the analysis of discontinuous media. This method has been widely applied to the 2D analysis of discontinuous deformation. However, it is hindered from analyzing 3D rock engineering problems mainly due to the lack of reliable 3D contact detection algorithms for polyhedra. Contact detection is a key in 3-D DDA analysis. The limitations and advantages of existing contact detection schemes are discussed in this paper, and a new approach, called the incision body （IB）, is proposed, taking into account the advantages of the existing methods. A computer code 3DIB, which uses the IB scheme as a 3D contact detection algorithm, was programmed with Visual C^＋＋. Static and dynamic stability analysis for three realistic engineering problems has been carried out. Furthermore, the focus is on studying the stability of a gravity dam on jointed rock foundation and dynamic stability of a fractured gravity dam subject to earthquake shaking. The simulation results show that the program 3DIB and incision body scheme are capable of detecting 3D block contacts correctly and hence simulating the open-close and slide process of jointed block masses. In addition, the code 3DIB could provide an effective tool for evaluating the safety of 3D dam structures, which is quite important for engineering problems.

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