基于损伤理论的钢筋混凝土结构裂缝分析

Damage Theory Based Analysis of Crack Opening Width for RC Structures

摘要:

依据裂缝开展与受拉损伤演化之间的内在联系，提出了基于损伤变量估计裂缝宽度的基本方法.将模型与损伤本构关系以及非线性有限元方法结合，可以精细地描述钢筋混凝土构件在外力作用下的非线性行为，特别是裂缝开展规律.与试验结果的对比表明，该方法不但具有良好的精度，而且能够描述构件非线性发展全过程中裂缝产生和扩展的规律.基于该方法精细分析混凝土结构中裂缝产生和发展的过程，可以为实际工程的分析和设计提供有力的依据.

Abstract:

Starting from the damage model proposed by the design code of the RC structure, a model to evaluate the crack opening width was proposed considering the dependence between damage and crack. By implementing the proposed method into the nonlinear finite element package, the crack propagation and opening within the RC structure could be simulated in a subtle way. The agreement between the simulating results and the experimental data validates and verifies the proposed method which lays a solid foundation for the engineering analysis and design of RC structures.