Abstract: Abstract: By wedge splitting tensile tests of pairs supporting for three group concrete specimens with different initial crack lengths, combined with fracture mechanics and damage mechanics theory, the influence of initial concrete crack lengths on concrete fracture and damage parameters was studied． According to test and calculation results, the damage parameters obtained in non－uniform stress field test were feasible, and the initial crack lengths had some influence on damage parameters, that was longer crack meant greater damage parameter．To crack observation, it was suggested that the monitoring instruments should be set at the crack ends, and strain mutations should be stressed and analysed．

摘要： 徐州市交通局公路管理处，江苏徐州 221000