日照下混凝土箱梁温度场数值分析研究

Numerical Analysis of Temperature Field of Concrete Box Girder under Sunlight

针对目前温度对混凝土箱梁桥设计和施工重要意义,讨论了确定箱梁温度场各种因素和边界条件在有限元程序的实现。以黑龙江富绥松花江大桥为例,采用了通用有限元程序ANSYS对大跨预应力混凝土箱梁温度场的热力学进行了有限元分析。通过实际工程论证此方法能较准确模拟混凝土的温度场,可为今后混凝土温度场提供一定的参考依据。

In view of the importance of current temperature to the design and construction of concrete box girder bridges,the realization of various factors and boundary conditions for determining the temperature field of box girder is discussed in the finite element program.Taking the Heilongjiang Fuhua Songhuajiang Bridge as an example,the general finite element program ANSYS was used to analyze the thermodynamics of the large-span prestressed concrete box girder.Through actual engineering,this method can accurately simulate the temperature field of concrete,which can provide a certain reference for concrete temperature field in the future.