复合胶凝材料钢管混凝土拱肋水化过程截面温度场试验及数值模拟分析

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℃。

Experimental research and numerical simulation of the concrete-filled steel tube arch rib cross-section temperature during the hydration process of a complex binder

Experimental observation of the concrete-filled steel tube(CFST) arch rib cross-section temperature was continuously carried out during the hydration process of a complex binder. By means of the heat conductivity theory and finite method, an analytical model was built and calculated in the CFST arch rib several factors were considered, including inertial conditions and the model of cement hydration thermal. The influence on the cross section temperature field caused by different steel tube thickness and diameter during the hydration process of a complex binder was dicussed. The results of analysis and study indicate that the model of cement hydration thermal was satisfactory using the hyperbolic formula, and that steel tube thickness has little influence when less than 2～3℃ on the temperature field of the CFST arch rib, however tube diameter has more influence up to 20℃.