A computational constitutive model for concrete subjected to dynamic loadings
A computational constitutive model for concrete subjected to dynamic loadings
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DOI：
10.1016/j.ijimpeng.2016.01.003
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发表时间：
2016-05
影响因子：
5.1
通讯作者：
H. Xu;H. Wen
中科院分区：
文献类型：
--
作者：
H. Xu;H. Wen
本文提出了一种动荷载作用下混凝土的计算本构模型。状态方程用P ~α关系描述。首先提出了考虑应变硬化、软化、动力增强、不考虑惯性效应的混凝土单轴无侧限压/拉强度模型，然后将该模型推广到全应力空间，考虑了压力相关性和矿脉效应。采用单元模拟方法和数值SHPB试验，将新开发的本构模型与HJC、RHT和K&C模型进行了比较。结果表明，新建立的混凝土本构模型优于现有的本构模型。
A computational constitutive model for concrete subjected to dynamic loadings is proposed in this paper. The equation of state is described by P ~αrelationship. The strength model is first proposed for concrete under uniaxial unconfined compression/tension by taking account of strain hardening and softening, dynamic enhancement excluding inertial effect, and then extended to total stress space by taking into consideration the pressure dependency and Lode effect. The newly developed constitutive model is compared with the HJC, RHT and K&C models by employing single element simulation approach and numerical SHPB tests. It transpires that the newly-developed constitutive model for concrete is advantageous over the existing models.