System reliability approach for rock scour
System reliability approach for rock scour
复制标题
岩石冲刷系统可靠性方法
DOI：
10.1016/j.ijrmms.2016.03.012
复制
发表时间：
2016
影响因子：
7.2
通讯作者：
Sitar, Nicholas
中科院分区：
文献类型：
--
作者：
George, Michael F.;Sitar, Nicholas
去除单个岩石块是发生冲刷的主要机制之一，并且由于与岩体以及相关块附近的流动条件相关的固有变化性，块体可蚀性的预测可能很复杂。为了解决问题的随机性，我们提出了一种在块体理论框架内评估 3D 岩石块体受水力载荷冲刷概率的系统可靠性评估方法。蒙特卡罗模拟用于确定整体块故障概率，并识别最可能的故障模式。然后使用一阶可靠性方法 (FORM) 来确定对不同变量的敏感性，从而确定物理参数相对于主要故障模式的相对重要性水平。使用一个示例问题来说明此信息在集中现场调查和分析最重要变量以及指导有关冲刷缓解策略的决策方面的价值。
Removal of individual blocks of rock is one of the principal mechanisms by which scour can occur, and prediction of block erodibility can be complicated due to the inherent variability associated with the rock mass as well as flow conditions in the vicinity of the block(s) in question. In order address the stochastic nature of the problem, we present a methodology for system reliability assessment of the probability of scour of 3D rock blocks subject to hydraulic loads within a block theory framework. Monte Carlo simulations are used to determine overall block failure probability, and to identify the most likely failure mode. A first-order reliability method (FORM) is then used to determine sensitivity to the different variables and hence the relative level of importance of the physical parameters with respect to the dominant failure mode. An example problem is used to illustrate the value of this information in focusing site investigations and analyses on the most important variables as well as in guiding decisions regarding scour mitigation strategies.
3D 块侵蚀性：岩石冲刷中岩水相互作用的动力学
DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
M. George
通讯作者：
M. George
影响因子：
4.7
作者：
Yong Zhang
通讯作者：
Yong Zhang