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针对复合胶凝材料钢管混凝土拱肋水化过程,对混凝土水化热作用下的钢管拱肋截面温度场进行了连续试验观测,以热传导理论结合有限元方法建立了钢管混凝土水化热分析模型,并进行了数值模拟分析。研究考虑了初始条件下水泥水化热的计算模型,并讨论了钢管厚度、管径等参数对钢管混凝土拱肋成型过程截面温度特性的影响。结果表明,对于复合胶凝材料钢管混凝土水化热的计算模型采用双曲线函数式较为合理;钢管拱壁厚对其截面温度场的影响较小,最大差值在2~3℃,而管径的大小对其影响较大,最大差值达20℃。
Aiming at the hydration process of concrete-filled steel tube concrete arch rib of composite cementitious material, the temperature field of the arch rib of steel tube arch under the hydration heat of concrete was continuously observed and observed. The thermal conductivity model and the finite element method were used to establish the concrete- And carried out numerical simulation analysis. The calculation model of hydration heat of cement under initial conditions was considered. The effects of parameters such as thickness of pipe and pipe diameter on the cross-section temperature characteristics of CFST arch rib were discussed. The results show that it is reasonable to use the hyperbolic function formula for the calculation of the hydration heat of the concrete of the composite cementitious material. The wall thickness of the steel pipe has a small influence on the temperature field of the cross section, with the maximum difference of 2 ~ 3 ℃, The size of its greater impact on the maximum difference of 20 ℃.