Numerical simulation study on mechanical properties of cement concrete after impact under different temperature conditions
It studies the numerical simulation of the mechanical properties of cement concrete after impact under different temperature conditions,and the results show that for uniaxial impact compression test,when the temperature is lower than 405℃at the same impact speed,the compressive strength of concrete material increases slightly with the increase of temperature,and when the temperature exceeds 405℃,the compressive strength of concrete decreases sharply with the increase of temperature.When the temperature increases from 25℃to 805℃,the peak stress of concrete decreases by 65.56%when the impact velocity is 7.5 m/s.When the impact velocity is 13.5 m/s,the peak stress of concrete is reduced by 63.87%.When the impact velocity is 17.5 m/s,the peak stress of concrete decreases by 44.25%,which indicates that the increase in material strength decreases with the enhancement of temperature damage effect.The variation law of impact velocity of concrete specimens at different temperatures shows that the peak stress of the material first increases and then decreases with the increase of impact velocity,and finally tends to be stable.
temperature conditionsmechanical propertiesstrikenumerical simulation
万方数据
