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混凝土箱梁桥温度场是非线性的,其分布主要取决于环境条件、物理性质、几何材料特征以及桥梁走向位置等因素。本文简要介绍了一个考虑以上因素计算箱梁表面温度分布的解析模型,在此基础上进行箱梁桥温度场的热力学有限元瞬态分析。以杭州湾跨海大桥非通航孔桥为例,计算大跨预应力混凝土箱梁结构的温度场,通过与规范的计算进行比较,得到一些关于混凝土箱型梁桥温度效应的结果,可为工程设计和管理提供必要的依据。
The temperature field of concrete box girder bridge is non-linear, and its distribution mainly depends on factors such as environmental conditions, physical properties, geometric material characteristics and the direction of the bridge. In this paper, an analytical model of box girder surface temperature distribution considering the above factors is briefly introduced. Based on this, a thermodynamic finite element transient analysis of box girder bridge temperature field is carried out. Taking the non-navigable bridge of Hangzhou Bay Bridge as an example, the temperature field of long-span prestressed concrete box girder is calculated and compared with the standard calculation to get some results about the temperature effect of concrete box girder bridge. Design and management to provide the necessary basis.