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A CONTINUUM DAMAGE MODEL OF aging concrete

Acta Mechanica Solida Sinica 2001年第1期14卷 20-30页

作者： Zhao Zhenyang Xie Huicai Xu Tao Yu Jie Cai Changan Reconstruction Committee of Guiyang City Guiyang 550001 China Technology College Shantou University Shantou 515063 China Research Center for Structures and Materials Guizhou University of TechnologyGuiyang 550003 China Research Center for Structures and Materials Guizhou University of TechnologyGuiyang 550003 China Research Center for Structures and Materials Guizhou University of TechnologyGuiyang 550003 China

There is up to now no constitutive model in the current theoriesof CDM that could give a description for the degradation of agingconcrete. The two internal state variable β and ω are intro- ducedin this paper β is called cohesion variable as an additionalkinematic parameter, reflecting the cohesion state among materialparticles. ω is called damage factor for micro-defects such s *** a damage model and a series of constitutive equations aredeveloped on Continuum Mechanics. The model proposed could give avalid description for the whole-course-degradation of aging concretedue to chemical and mechanical actions. Finally, the validity of themodel is evaluated by an example and experimental results.

关键词： aging concrete consistent equation continuum damage mechanics (CDM)

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A Continuum Damage Model of aging concrete

A Continuum Damage Model of Aging Concrete

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作者： ZHAO Zhen-yang~1,XIE Hui-cai~2,XU Tao~3,YU Jie~3,CAI Chan-gan~3 (1.Reconstruction Committee of Guiyang City,GUiyang 55001,China 2.Technology College,Shantou University,Shantou 515063,China 3.Research Center for Structures and Materials,Guizhou University of Technology, Guiyang 550003,China)

There is up to no constitutive model in the current theories of CDM that could give a description for degradation of aging *** two internal state variablesβandωare introduced in this paper.βis called cohesion variable as an additional kinematic parameter,reflecting the cohesion state among material particles.ωis called damage factor for micro-defects such as *** a damage model and a series of constitutive equations are developed on Continuum *** model proposed could give a valid description for wholecourse -degradation of aging concrete due to chemical and mechanical ***,validity of the model is evaluated by an example and experimental results.

关键词： aging concrete consistent equation continuum damage mechanics(CDM) Strain softening

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