摘   要：预制箱梁混凝土水化热产生的温度裂缝问题是目前工程界尚未完全解决的问题。本文以哈大高铁预应力混凝土箱梁的预制工程为背景，通过ANSYS有限元分析软件，基于三维非稳态温度场理论对跨度32m预制箱梁水化热温度场进行有限元模拟，并将有限元分析结果与现场实测数据进行对比。研究结果表明，采用数值分析的方法可以较为真实地模拟混凝土水化热温度场。本文所研究的成果可为大型混凝土箱梁预制过程的温度监控、防止温度裂缝产生提供一定的理论依据。

Abstract：The hydration heat temperature crack problem of precast box girder concrete  is an engineering problem whicih has not yet been completely solve.Based on the precast construction of Harbin-Dalian high-speed rail prestressed concrete box girder and the theory of three-dimensional unsteady temperature field, the hydration heat temperature field of precast concrete box girders with 32m span is simulated through the ANSYS finite element analysis software and the finite element analysis results are compared with the measured data. The results show that using the method of numerical analysis can be more realistic simulation of concrete hydration heat temperature field, and this article research results can provide a theoretical basis for large precast concrete box girder temperature monitoring of the process and  preventing temperature cracks.