Simulation analysis of temperature stress during gate pier construction

Gate piers;  numerical simulation;  ANSYS;  temperature stress;  cracks;  Temperature control measures

Considering the external temperature conditions, heat of cement hydration, elastic mold, creep and other thermodynamic and physical mechanical parameters, as well as the influence of layered pouring (using life and death units to achieve layered pouring) on the temperature stress of the gate pier, the 3D finite element method of ANSYS software was used to simulate the transient temperature field and stress field during the construction period of the gate pier. The results show that the temperature difference between the inside and outside is too large, and the internal temperature rise and temperature drop is too fast, which is the main reason for the cracks in the gate pier, and it is proposed to cool the mixing material, reduce the pouring temperature, adopt the optimized heat preservation and moisturizing maintenance method, embed the cooling water pipe in the concrete, select low-heat cement, use water reducing agent, etc. to reduce the temperature difference between inside and outside, and slow down the temperature rise and temperature drop process, so as to effectively prevent the occurrence of surface cracks during construction.