CAJ | 학술논문

试验和现场观测都发现高土石坝的坝料在高压及湿化作用下会发生显著的颗粒破碎，颗粒破碎会改变土石料的级配曲线和密度，因而影响其后继力学行为，因此，土石料的颗粒破碎是当前岩土工程领域的研究热点。为了模拟土石料在高压及湿化作用下发生显著的颗粒破碎现象，以及循环加载中的颗粒破碎与应力诱导各向异性随动硬化共同影响下土石料的变形，本文提出了一个建模方法，考虑土石料颗粒破碎和密度变化的影响。所建议的次塑性本构模型在经过试验资料的验证后可用于动力有限元数值计算。
시험화현장관측도발현고토석패적패료재고압급습화작용하회발생현저적과립파쇄，과립파쇄회개변토석료적급배곡선화밀도，인이영향기후계역학행위，인차，토석료적과립파쇄시당전암토공정영역적연구열점。위료모의토석료재고압급습화작용하발생현저적과립파쇄현상，이급순배가재중적과립파쇄여응력유도각향이성수동경화공동영향하토석료적변형，본문제출료일개건모방법，고필토석료과립파쇄화밀도변화적영향。소건의적차소성본구모형재경과시험자료적험증후가용우동력유한원수치계산。
It is found from laboratory tests and in-situ observation that earth fills in high dams are usually crushed under high pressure and soaked condition. Particle crushing will change the distribution of earth fills and density; accordingly change the stress-strain behavior. In order to model this behavior, a method is proposed to develop a hypo-plastic constitutive model. Rock particle crushing and density changing, as well as the stress induced anisotropy change in high dams are considered. The hypo-plastic model can also be used to describe cyclic behavior in combination of crushing and density changing effect. The developed model needs test data verification; and then it can be further used into dynamic elastoplastic FEM programming and analysis of high earth-rock dams.