Pressure-Level Dependency and Densification Behavior of Sand Through Generalized Plasticity Model
Pressure-Level Dependency and Densification Behavior of Sand Through Generalized Plasticity Model
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DOI：
10.1061/(asce)0733-9399(2003)129:8(851
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发表时间：
2003-08
期刊：
影响因子：
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通讯作者：
H. Ling;Huabei Liu
中科院分区：
文献类型：
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作者：
H. Ling;Huabei Liu
天然土体和人造土体具有复杂的工程特性，受应力水平和排水条件等因素的影响。由于自重、荷载和边界条件的不同，土结构内的应力条件变化很大，从很低到很高不等。在静载下表现出排水状态的饱和沙堆在地震激励下变得不排水。Pastor-Zienkiewicz-Chan模型在描述各向同性单调和循环荷载作用下土的非弹性行为(包括液化和循环移动性)方面取得了相当大的成功。本研究对Pastor-Zienkiewicz-Chan模型进行了修正，以模拟应力水平和致密化行为的影响。该模型表明，内摩擦角、弹性模数和塑性模数与压力水平有关。进行了相关的修改，加入了平均功率项。
Natural soil deposits and man-made earth structures exhibit complicated engineering behavior that is influenced by factors such as the stress level and drainage conditions. The stress conditions within a soil structure vary greatly, ranging from very low to very high values, due to the dead weight, loading and boundary conditions. Saturated sand deposits that exhibit drained conditions under static loading become undrained when subject to earthquake excitations. The Pastor–Zienkiewicz–Chan model has demonstrated considerable success in describing the inelastic behavior of soils under isotropic monotonic and cyclic loadings, including liquefaction and cyclic mobility. This study proposed modifications to the Pastor–Zienkiewicz–Chan model so that effects of stress level and densification behavior are simulated. The proposed model suggested that the angle of internal friction, elastic and plastic moduli are dependent on the pressure levels. Relevant modifications were made to incorporate a power term of mean...