基于单弹簧联结单元法的钢筋混凝土梁损伤模拟

钢筋混凝土梁的损伤模拟的重难点在于描述两种材料非线性的本构关系以及钢筋混凝土粘结滑移关系非线性的描述，采用单弹簧联结单元法模拟钢筋和混凝土相互作用，结合混凝土四参数损伤模型，模拟钢筋混凝土结构多轴应力状态下从开始加载到结构破坏的全过程。数值算例不仅体现该方法的有效性，也具有重要的工程实践意义。

Simulation of damage evolution for reinforced concrete beams based on single spring joint element method

Due to the two nonlinear factors involved the materials of the concrete and reinforced bar and the interaction of two materials, the whole damage process of the RC structures could hardly be simulated based on the conversional methods. In the present work, the four-parameter damage model which considers the material nonlinearities, combined with the single spring joint element method based on mixed coordinate system which is used to simulate the interaction of the two materials is introduced to depict the damage process of RC strctures. Numerical examples not only demonstrate the validity and accuracy of the proposed approach but also show that this method could be applied to engineering application.