Numerical Simulation On The Deformation Of Early-age Mass Concrete Slab Restricted By Pile Foundation

Mass concrete slab is being used in construction works more and more with the development of modern concrete. On one hand, the stress in mass concrete slab is caused because of the difference between internal temperature and external one. On the other hand, with the concrete hardening, the tensile stress will appear due to concrete's shrinkage restricted by pile foundation. Once the stress generated from both above exceeds the ultimate tensile strength of concrete at the same age, temperature crack of concrete is sure to appear. It is obvious for crack to destroy the completeness, anti-water and water-tolerant behavior of the structures, and cause safety crisis of structures.In order to do more analyses about the deformation of early-age mass concrete slab, this paper has done the thermal-structure coupling analysis of mass concrete in the process of construction and maintenance based on the theory of linear transient temperature field and thermo-elastic mechanics within FEM. The effects of early age mass concrete slab deformation caused by different edge conditions restricted by pile foundation are also analyzed. At the same time, the theory value of the later joint-filled slots spacing is also given.Finally, some important conclusions are drawn on the basis of the analytical results. The deformation of mass concrete slab, generates mostly in the early age, has an approximately linear relationship with the dimension of the slab.All research work here can be refered by engineer and researcher in the field.