基于无单元伽辽金法的混凝土梁裂缝分析

Analysis of the Concrete Beam Crack Based on Element-Free Galerkin Method

混凝土材料的断裂过程具有非线性断裂特性,而无网格方法由于不需要单元网格,非常适用于分析非均匀材料的断裂问题。混凝土梁裂缝扩展分析利用无网格方法可以非常方便地调整节点分布的特点,通过增加裂缝节点和裂面边界的方法加以模拟。通过算例表明,利用无单元伽辽金法,可以较准确地分析混凝土宏观裂缝的产生、扩展以及裂缝宽度变化。

The concrete material breaking - down process has the non - linear break characteristic, and element - free galerkin method is suitable extremely in analyzing the break question of the non- even material because it does not need the unit grid. Simulation can be performed by increasing crack pitch point and the fracture boundary method. Examples indicate that element- free galerkin method may accurately analyze production, expansion as well as the crack opening change of the concrete macroscopic crack. This method is superior to the traditional finite element method.