Compressive softening model for concrete
Compressive softening model for concrete
复制标题
混凝土压缩软化模型
DOI：
10.1061/(asce)0733-9399(1992)118:8(1546
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
S. Hatanaka
中科院分区：
文献类型：
--
作者：
E. Mizuno;S. Hatanaka
提出了一个基于应变空间的塑性模型来描述混凝土在低围压下的软化和硬化行为。与基于Drucker公设的应力空间塑性理论不同，基于Il'yushin公设的应变空间塑性理论可以明确区分加载、中性加载和卸载。通过引入Lade型载荷函数F和在应变空间中定义的新塑性势函数G，详细介绍了一般应变空间公式。增量应力-应变关系以张量形式给出。利用三轴压缩试验数据，确定了模型参数，并进行了模型模拟，以验证模型的性能。结果表明，该模型能较好地预测混凝土材料在低围压下的软化硬化行为。
A strain‐space‐based plasticity model is proposed to represent the softening as well as hardening behavior of concrete under low confining pressure. Unlike the stress‐space plasticity theory based on the Drucker's postulate, the strain‐space plasticity theory based on the Il'yushin's postulate can give a clear distinction of loading, neutral loading, and unloading. The general strain‐space formulation is presented in some detail by introducing the Lade type of loading function F and a new plastic potential function G defined in strain space. The incremental stress‐strain relation is given in a tensorial form. Using the experimental data available from triaxial compression tests, the model parameters are determined, and model simulation is performed to demonstrate the model capability. It is confirmed that the proposed model can sufficiently predict the softening as well as hardening behavior of concrete materials under the low confining pressure.