Brittle elastic damage constitutive model of plain concrete under
biaxial compression after freezethaw cycles
1.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan， Hubei 430072, China; 2.Collaborative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao Technological University, Qingdao， Shandong 266033, China; 3.Sinopec Petroleum Construction Shengli Corporation, Dongying, Shandong 257000, China
Abstract： The mechanical performance of plain concrete depends on not only the plain concrete body, but also the behavior suffered from the damage of freezethaw cycles. The biaxial compression stressstrain curves of concrete after freezethaw cycles were taken as research objects, and the characteristics of strain of ε3 in the direction of main pressure affected by effective stress of 2 were considered. The brittle elastic damage constitutive model of plain concrete specimens under biaxial compression after freezethaw cycles was established based on thermodynamics mechanics and damage mechanics. The computed results according to brittle elastic damage constitutive model were compared with the experimental results. The results show that the proposed model can well describe the stressstrain curves of plain concrete under biaxial compression after freezethaw cycles.
2014, Vol. 35 
