改进的混凝土弹塑性损伤本构  

Improved Elasto-plasticity Damage Constitutive Models for Concrete

作　　者：徐强[1] 陈健云[1,2] 白卫峰[1] 刘智光[1] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116023 [2]大连理工大学海岸与近海工程国家重点试验室,辽宁大连116023

出　　处：《四川大学学报（工程科学版）》2011年第4期77-82,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家"973"计划资助项目2007CB714107);教育部新世纪优秀人才计划资助项目(NCET-06-0270);国家自然科学基金资助项目(50978043)

摘　　要：针对现有的混凝土弹塑性损伤本构模型的缺陷,利用能够反映混凝土拉压方向不同强度特性的Hsieh-Ting-Chen四参数屈服函数,基于热力学耗散原理提出了一种新的混凝土弹塑性损伤本构模型,并且进行单轴拉伸和单轴压缩下,应力-应变关系的数值试验。和其它混凝土弹塑性损伤本构模型相比,提出的弹塑性损伤本构模型有其优点:只有一个未知参数,其余的参数都和Hsieh-Ting-Chen混凝土四参数屈服函数的参数相同,易于确定未知参数;并且拉压损伤演化定律采用相同的计算公式,能够较好地反映混凝土在复杂应力状态下的拉压不同的损伤特性及应力-应变曲线。In order to improve the limitation and lacuna of the traditional damage constitutive models for concrete,by using Hsieh-Ting-Chen four-parameter yield function,which could reflect the different strength characteristics of concrete in tension and compression,a new elasto-plasticity damage constitutive models for concrete was proposed based on the energy dissipation principle.Moreover,numerical test for concrete stress-strain relation under uniaxial tension and compression was given.Compared with other damage constitutive models,the proposed model contained only one unknown parameter and the other parameters could be found in Hsieh-Ting-Chen four-parameter yield function.And the same damage evolution law,which is used for tension and compression,was good for determining stress-strain curves and damage characteristic in complex stress state.

关 键 词：混凝土 塑性 本构模型 热力学耗散 应力-应变本构关系 

分 类 号：TV33[水利工程—水工结构工程]