岩石–混凝土相互作用力学行为的数值模拟研究

针对大坝与坝基、坝肩与库岸相互作用机理,在总结了几种典型接触单元基础上,根据谢和平提出的两体力学模型,采用有限差分程序FLAC,对岩石–混凝土接触界面在直剪作用下的力学性能进行了数值模拟,研究了两体力学模型的破坏过程及不同接触面粗糙度对其整体力学性能的影响。结果表明,两体力学模型破坏过程具有几个明显的不同阶段,节理面粗糙度对其力学性能具有明显的影响。

NUMERICAL SIMULATION OF INTERFACE BEHAVIOR IN ROCK-CONCRETE INTERACTION PROBLEM

Based on the review of some classic interface elements,a twin-body model is offered for research on mechanical performance of interface between rock and concrete for the assessment of stability of concrete dam foundation.In this paper,FLAC,a finite difference program,is utilized to model the mechanical behaviors of rock-concrete and rock-rock interface with the action of compressive and shear loads.The stress,displacements and plastic zone distribution are obtained to explain the model failure and the effect of interface.Results show that some different stages happen in the damage process and the interface roughness has an obvious effect on the mechanical behaviors of the model.