Bounding Surface Hypoplasticity Model for Sand
Bounding Surface Hypoplasticity Model for Sand
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DOI：
10.1061/(asce)0733-9399(1990)116:5(983
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发表时间：
1990-05
期刊：
影响因子：
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通讯作者：
Zhi-Liang Wang;Y. Dafalias;Chih-Kang Shen
中科院分区：
文献类型：
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作者：
Zhi-Liang Wang;Y. Dafalias;Chih-Kang Shen
在边界面次塑性理论框架内，建立了砂土的综合本构模型。该模型的显著特点是加载和塑性应变速率方向依赖于应力速率方向。此属性会呈现模型发育不良。该模型可以模拟砂土在不同荷载作用下的不同特性，从简单的单调荷载到复杂的循环荷载。特别是，在“旋转剪切”下的响应的成功模拟是该模型的独特属性之一，这主要是由于其亚塑性特征。这种预测能力在实践中的重要性与液化现象有关，液化现象可能发生在这种复杂性质的循环加载条件下，导致主应力值和主应力方向的循环变化。本文提出了一个逐步校准程序的不同常数和一个...
A comprehensive constitutive model for sand is formulated within the general framework of bounding surface hypoplasticity. The distinctive feature of this model is the dependence of the loading and plastic strain rate directions on the stress rate direction. This property renders the model hypoplastic. The model can simulate different features of sand behavior under loading conditions, which range from simple monbtonic to complex cyclic at different amplitudes and directions. In particular, the successful simulation of the response under “rotational shear” is one of the distinctive properties of the model, and it is mainly due to its hypoplastic character. The importance of such predictive capability in practice is related to the phenomenon of liquefaction, which may occur under such cyclic loading conditions of a complex nature, entailing cyclic changes of both principal stress values and principal stress directions. The paper presents a step‐by‐step calibration procedure of the different constants and a...