| 应变空间表述的混凝土弹塑性耦合本构模型 |
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| 引用本文： | 张承柱,刘信声. 应变空间表述的混凝土弹塑性耦合本构模型[J]. 清华大学学报(自然科学版), 1996, 0(3) |
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| 作者姓名： | 张承柱 刘信声 |
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| 作者单位： | 清华大学工程力学系!北京100084 |
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| 摘 要： | 考虑到岩土类材料的应变软化和弹塑性耦合特点，从Ｉｌ’ｙｕｓｈｉｎ公设出发，把弹性模量看成是塑性应变的函数，直接从应变空间构造初始屈服函数并确定加载函数，推导出一个应变空间表述的本构模型。该模型不但可以描述材料的强化段，而且可以描述材料的软化段并能反映材料弹塑性耦合的性质。给出的两个简单算例说明了该模型的有效性。
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| 关 键 词： | 混凝土 应变空间 弹塑性耦合 本构关系 |
Constitutive model for concrete in strain space with elastoplastic coupling |
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| Zhang Chengzhu,Liu Xinsheng. Constitutive model for concrete in strain space with elastoplastic coupling[J]. Journal of Tsinghua University(Science and Technology), 1996, 0(3) |
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| Authors: | Zhang Chengzhu Liu Xinsheng |
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| Affiliation: | Zhang Chengzhu,Liu Xinsheng Department of Engineering Mechanics,Tsinghua University |
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| Abstract: | Two key characters of concrete are strain-softening and elastoplastic coupling. In this paper, an elastoplastic constitutive is proposed in strain space based on the Il'yushin postulate. The modulus of elasticity is proposed as the function of plastic strain, and the initial yield criterion and harding softening function are proposed in strain space directly. The proposed constitutive relation describes the hardening and softening stages and the elastoplastic coupling of concretes. Two examples demonstrate the proposed model's validity. |
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| Keywords: | concrete strain space elastoplastic coupling constitutive |
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