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《Chinese Journal of Computational Mechanics》 2017-05
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Mesoscale Rigid-Body-Spring Model for analyzing the crack propagation of concrete cover due to steel bar corrosion

LIANG Yong-qin;WANG Li-cheng;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology;  
In order to obtain the crack propagation process and mechanical response of concrete cover induced by steel bar corrosion,a numerical model based on the mesoscale Rigid-Body-Spring Model(RBSM)was established in the present work.The results show that the crack pattern is in good agreement with the experimental observations,and the model stiffness is similar to that obtained when the theoretical model for concrete composite materials,while the peak averaged corrosion pressure calculated with a softening constitutive model for concrete is also similar to that of the theoretical model,thus the numerical model is yalidated.Then the effects of concrete cover thickness and steel bar diameter on mechanical response during the corrosion process were investigated.The results show that the peak corrosion pressure and displacement decrease with the decreasing concrete cover thickness.The increase in steel bar diameter will bring about the decrease of the peak corrosion pressure,and the corresponding displacement presents a decreasing tendency on the whole.
【Fund】: 国家自然科学基金面上项目(51378090);; 国家重点基础研究发展计划(973计划)(2015CB057703;2015CB057701)资助项目
【CateGory Index】: TU375
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