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本文以芜湖二桥引桥工程为依托,对预制箱梁浇筑及养护过程中的温度场进行实测分析,并借助大型通用有限元软件ANSYS对箱梁的温度场进行有限元模拟,分析了温度峰值以和温差,并将实测数据与理论数据进行对比分析。分析结果表明,预制箱梁的温度场分布比较合理,满足规范要求,实测数据与理论数据也是十分吻合的。最后,将本文薄壁箱梁的温度场分析结论同常用的两种预制梁截面进行对比,结果表明薄壁截面的温度峰值以及温差都是明显低于常规截面。
In this paper, based on Wuhu Bridge Project, the temperature field during the pouring and curing of prefabricated box girder is measured and analyzed. The temperature field of box girder is simulated by ANSYS, And temperature difference, and the measured data and theoretical data for comparative analysis. The analysis results show that the temperature distribution of prefabricated box girders is reasonable and meets the requirements of the code. The measured data and the theoretical data are also in good agreement. Finally, the results of the temperature field analysis of the thin-walled box girder are compared with those of the two commonly used prefabricated beams. The results show that the peak temperature and the temperature difference of the thin-walled section are obviously lower than those of the conventional section.