A Unified Viscoplasticity Damage Constitutive Model for Concrete Materials

摘要：

A unified viscoplasticity damage constitutive model for concrete materials is developed within the framework of irreversible thermodynamics. The expressions of a Helmholtz free energy function and a non-associated flow potential function are given, from which the constitutive equation, flow equation and the evolution equations of the state variables are derived. The results of numerical simulation show that the model without the formal hypotheses of yield criterion and failure criteria is capable of reproducing the significant deformation phenomena of concrete. Therefore, this theoretical framework is reasonable and practical.

关键词： concrete unified constitutive viscoplasticity irreversible thermodynamics

作者: Liu Changchun Feng Minghui Guan Ping Lü Hexiang

作者单位: State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technolog Department of Structure and Materials, China Institute of water Resources arid Hydropower Research, Dalian University, Dalian116622, China

会议类型: 国际会议

会议名称: 第五届碾压混凝土坝国际研讨会(The Fifth International Symposium on Roller Compacted Concrete(RCC))

会议地点: 贵阳

会议语种:英文

页码: 595-599

在线出版日期: 2007-11-02（万方平台首次上网日期，不代表论文的发表时间）