Finite-element study of the diagonal-tension failure in reinforced concrete beams
Finite-element study of the diagonal-tension failure in reinforced concrete beams
复制标题
钢筋混凝土梁斜拉破坏的有限元研究
DOI：
10.1007/s10704-011-9592-z
复制
发表时间：
2011
影响因子：
2.5
通讯作者：
G. Ruiz
中科院分区：
文献类型：
--
作者：
R. Yu;L. Saucedo;G. Ruiz
在这项工作中，我们的目标是解决钢筋混凝土（RC）结构中最具破坏性的破坏模式之一：斜拉破坏。为了研究这一现象的数值，一个能够处理静态和动态裂纹扩展以及这两个政权的自然过渡的模型是必要的。我们选择了一个离散的混凝土断裂模型，混凝土和钢筋之间的退化界面粘结滑移模型，都结合了插入算法。静态过程由动态松弛（DR）方法连同改进的技术来解决，以提高收敛速度。相同的DR方法用于检测动态过程并切换到动态计算。该方法适用于模型的实验结果Carmona等人。（Engineering Fracture Mechanics 74：2788-2809，2007），其中在假定的静态计算中识别到动态断裂的转变对于再现观察到的对角拉伸失效是必要的。
In this work, we aim to tackle one of the most devastating failure modes in reinforced concrete (RC) structures: the diagonal-tension failure. In order to study this phenomenon numerically, a model capable of dealing with both static and dynamic crack propagation as well as the natural transition of these two regimes is necessary. We chose a discrete cohesive model for concrete fracture, an interface bond-slip model for the deterioration between concrete and steel rebar, both combined with an insertion algorithm. The static process is solved by a dynamic relaxation (DR) method together with a modified technique to enhance the convergence rate. The same DR method is used to detect a dynamic process and switch to a dynamic calculation. The methodology is applied to model the experimental results of Carmona et al. (Engineering Fracture Mechanics 74:2788–2809, 2007), where the recognition of the transition to a dynamic fracture in a presumably static calculation is essential to reproduce the diagonal-tension failure observed.