【摘要】 针对国内某高拱坝,基于Hillerborg断裂力学理论的混凝土本构模型,采用constraint-function的接触算法,考虑大坝的横缝和诱导缝,建立三维坝体-地基动力相互作用分析模型。选取不同地震波,对模型进行非线性动力时程分析,研究地震过程中混凝土坝体拉-压交替的受力规律以及动力损伤的开裂过程,分析横缝和诱导缝在地震中开合往复的工作性态。研究方法和研究成果对评价高拱坝的抗震性能提供一种有效的方法。更多还原

【Abstract】 This paper develops a 3D model of dam-foundation dynamic interaction for a high arch dam in China,based on the concrete constitutive model of Hillerborg fracture theory for modeling of contraction joints and induced joints,using a constraint-function contact algorithm.Different seismic waves are used for numerical simulations,and the calculated non-linear dynamic time-history are analyzed,focusing on the variations of tension-compression cycles of dam concrete and damage cracking process and the alternative opening-closing behaviors of contraction joints and induced joints.This work provides valuable references and effective methods for assessment of aseismic ability of arch dam.更多还原