Inversion and simulation analysis of concrete thermal parameters of rock-bolted crane beam
The accuracy of bulk concrete parameters is the key to simulation calculation. The parame-ters obtained through inversion can better reflect the actual characteristics of engineering materials,making the simulation result more accurate. According to the concrete temperature monitoring values of the rock-bolted crane beam in the underground powerhouse of Tongcheng pumped storage power sta-tion,the three-dimensional finite element simulation calculation is adopted,and the actual influencing factors such as layered pouring,flake ice or crushed ice mixing and water cooling are considered to in-vert the adiabatic temperature rise parameters of concrete,then conducting the real temperature stress field calculation and temperature control sensitivity analysis of the rock-bolted crane beam based on the parameters. The calculated stress field can accurately reflect the true force state of rock-bolted crane beam,and the tensile stress does not exceed the allowable tensile stress of the project,indicating that the temperature control measures and standard design of this project meet the crack prevention require-ments. The sensitivity analysis results show that reducing the pouring temperature and arranging cooling water pipes reasonably can better reduce the temperature stress and play a good crack prevention effect.
万方数据
维普
