Abstract:The temperature and stress changes of special-shaped mass concrete in the construction process was studied, and the rationality of the design to prevent cracks in the special-shaped concrete structure was verified in this paper. Taking a special-shaped mass concrete pier of landscape cloud bridge in Longyou county as the engineering background, the finite element models were established by large-scale finite element software to simulate whether the influence of cooling pipe on structural hydration heat was considered. Furthermore, the time-varying law of internal temperature along the thickness direction was studied, and the structural temperature field and stress field with or without cooling pipe were compared and analyzed. The results show that: In the process of pouring, the temperature in the center of the structure first rises and then falls. Additionally, the high temperature area inside the concrete gradually shrinks and moves downward along the thickness direction from the initial pouring center with the development of concrete age. The early stress of the structure is caused by the temperature difference between the inside and outside, and concentrated on the outside surface. The internal temperature field of special-shaped pier is basically the same as that of conventional pier, and the internal temperature is slightly lower than that of the latter. Through the arrangement of cooling pipes, the hydration heat of the structure is effectively reduced, the temperature stress is reduced, and the surface temperature cracks are effectively controlled.