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Typical Elasto-Plastic Constitutive Models and Their Sensitivity Studies of Earth Materials

Abstract

岩土类材料的非线性力学行为研究对于土-结构相互作用体系或者坝-地基-库水耦合体系的地震动力响应分析具有重要意义。比如砂土液化可能导致地基失效,继而引起上部结构破坏。混凝土坝的损伤开裂有可能演化成为坝的整体破坏甚至溃坝等重大灾变行为。因此深入研究岩土类材料地震过程中非线性破坏的力学行为是非常必要的。基于此,本文深入研究了三维J2模型,Cap模型、与压力无关多屈服面黏土(MYS)模型、与压力有关的多屈服面可液化砂土模型(包括砂土剪缩,剪胀,液化和应变滑移等复杂力学行为)、Drucker-Prager模型等几类经典的岩土类材料本构关系,详细阐述了这些模型的计算流程和数值实现方法。此外,本文对MYS模...Study on the nonlinear mechanics behavior of earth materials has significant influence on the seismic dynamic response analysis of the soil-foundation-structures interaction system (SFSI) and dam-foundation-water coupling system. For instance, soil liquefaction may lead to foundation failure and in turn damage the upper structures. The damage fracture on concrete dam could evolve into structural f...学位:工学硕士院系专业:建筑与土木工程学院_结构工程学号:2532012115170

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