Shrinkage simulation analysis of subway station sidewalls under different humidity levels
Relying on the actual metro station project,the effect of different environmental humidity on the shrinkage of its sidewall concrete structure is investigated.Based on the CEB-FIP(90)prediction model,the shrinkage calculation method of the model is written into the UEXPAN subroutine,and then combined with the USDFLD subroutine,ABAQUS is used to simulate the shrinkage stresses of the sidewalls under different humidity.From the simulation results,it can be seen that with the growth of age,the modulus of elasticity becomes larger,and the contraction stress increases;the contraction stress of the side wall in the height direction decreases from bottom to top,and the closer to the boundaries of the constraints,the greater the contraction stress;with the increase of humidity of the external environment,the contraction stress of the concrete side wall gradually becomes smaller,thus improving the cracking resistance of the concrete structure.The numerical results provide a theoretical reference for controlling the shrinkage stress of concrete structures.And it is of great significance for concrete construction under various humidity environments.
metro stationsconcrete structureshrinkage stresshumidityABAQUS
万方数据
维普
