DOI: 10.15986/j.1006-7930.2020.02.008
混凝土薄壁箱梁温度场受地理位置、风速风向、太阳辐射等多方面因素影响,而箱梁温度场分布又很大程度上决定了桥梁所受到的温度应力.本文以佳县黄河大桥为背景,针对左右两侧日照辐射不平衡的箱梁,通过现有地理资料与有限元软件进行了模拟仿真计算,最后与实测温度场数据对比,验证了模拟仿真计算结果的准确性,得到了各时刻箱梁截面在此种日照下的温度场分布,并利用有限元模型结果分析确定了此类桥梁薄壁箱梁各构件温度分布规律,可以为今后此种桥位箱型截面桥梁温度场计算提供参考.
The temperature field of thin-walled concrete box girder is affected by many factors, such as geographical location, wind speed, wind direction, solar radiation and so on. The temperature field distribution of box girder largely determines the temperature stress of bridge. Based on the background of Jiaxian Yellow River Bridge, this paper simulates and calculates the box girder with unbalanced solar radiation on the left and right sides by using the existing geographic data and finite element software. Finally, the accuracy of the simulation results is verified by comparing with the measured temperature field data. The temperature field distribution of the box girder section under this kind of sunshine at all times is obtained, and the results of finite element model are used. The temperature distribution law of thin-walled box girder components of this kind of bridge is analyzed and determined, which can provide reference for the calculation of temperature field of box section bridge in this kind of bridge location in the future.
