超高空心薄壁墩温度时变效应研究
发布时间：2019-04-25 08:03
【摘要】：高墩大跨结构在跨越高山河谷时往往是首选，但是近些年来发现日照温度荷载对于高墩的作用不可被忽略，特别是在超高墩中温度效应更为明显，这就使得对于日照温度荷载的研究变得尤为重要。 论文以陕西旬邑高速在建项目三水河特大桥为背景，主要对180m超高矩形薄壁空心墩进行了温度场测试和数据分析，最后采用有限元软件Midas FEA进行桥墩墩顶偏位与温度场关系的研究。 论文从实测的桥墩温度场数据出发，分析了温度场沿着壁厚方向的分布规律，总结出适合陕西旬邑地区夏季、冬季的温度场公式。该公式与实测数据相比较具有较好的精确度，可供该类桥墩在该地区日后的计算或设计参考。 以实测墩顶偏位数据为基础结合当日的温度场数据，进行沿壁厚方向的日照温差与墩顶偏位之间的关系分析，并且结合当日的温度场数据使用Midas FEA有限元软件分析在该温度场下的墩顶偏位，后又结合拟合公式，计算了在该拟合公式下的温度场的墩顶偏位，最后将墩顶实测位移数据、当日温度场下的墩顶计算位移、拟合公式下的墩顶计算位移三者进行比较，结果显示数据具有较好的工程参考价值，为该桥墩形式在日后设计分析计算中提供较好的参考。 最后结合施工需要，提出了三条减小温差位移对桥梁结构的影响可行性建议。
[Abstract]:The high pier and long span structure is usually the first choice when crossing the high mountain valley, but in recent years it has been found that the effect of sunshine temperature load on the high pier can not be ignored, especially the temperature effect is more obvious in the super high pier. This makes the research of sunshine temperature load especially important. Based on the construction of Sanshuihe Bridge in Xunyi Expressway, Shaanxi Province, the temperature field test and data analysis of 180m ultra-high rectangular thin-walled hollow pier are carried out in this paper. Finally, finite element software Midas FEA is used to study the relationship between pier top deflection and temperature field. Based on the measured temperature field data of bridge pier, the distribution law of temperature field along the direction of wall thickness is analyzed, and the formula of temperature field suitable for summer and winter in Xunyi area of Shaanxi Province is summarized. Compared with the measured data, the formula has better accuracy and can be used as reference for future calculation or design of this kind of piers in this area. Based on the measured displacement data of pier top and the data of temperature field of the same day, the relationship between the temperature difference of sunshine along the direction of wall thickness and the deviation of pier top is analyzed. Combined with the temperature field data of the same day, the deflection of the pier top under the temperature field is analyzed by Midas FEA finite element software, and then the deviation of the temperature field under the fitting formula is calculated by combining the fitting formula. Finally, the displacement data of the pier top are measured. The calculated displacement of the pier top under the temperature field of the same day is compared with the calculated displacement of the pier top under the fitting formula. The results show that the data have a good engineering reference value, which provides a good reference for the design and calculation of the pier form in the future. Finally, three feasible suggestions are put forward to reduce the influence of temperature difference displacement on bridge structure.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441.5
本文编号：2464930
[Abstract]:The high pier and long span structure is usually the first choice when crossing the high mountain valley, but in recent years it has been found that the effect of sunshine temperature load on the high pier can not be ignored, especially the temperature effect is more obvious in the super high pier. This makes the research of sunshine temperature load especially important. Based on the construction of Sanshuihe Bridge in Xunyi Expressway, Shaanxi Province, the temperature field test and data analysis of 180m ultra-high rectangular thin-walled hollow pier are carried out in this paper. Finally, finite element software Midas FEA is used to study the relationship between pier top deflection and temperature field. Based on the measured temperature field data of bridge pier, the distribution law of temperature field along the direction of wall thickness is analyzed, and the formula of temperature field suitable for summer and winter in Xunyi area of Shaanxi Province is summarized. Compared with the measured data, the formula has better accuracy and can be used as reference for future calculation or design of this kind of piers in this area. Based on the measured displacement data of pier top and the data of temperature field of the same day, the relationship between the temperature difference of sunshine along the direction of wall thickness and the deviation of pier top is analyzed. Combined with the temperature field data of the same day, the deflection of the pier top under the temperature field is analyzed by Midas FEA finite element software, and then the deviation of the temperature field under the fitting formula is calculated by combining the fitting formula. Finally, the displacement data of the pier top are measured. The calculated displacement of the pier top under the temperature field of the same day is compared with the calculated displacement of the pier top under the fitting formula. The results show that the data have a good engineering reference value, which provides a good reference for the design and calculation of the pier form in the future. Finally, three feasible suggestions are put forward to reduce the influence of temperature difference displacement on bridge structure.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441.5
【参考文献】
相关期刊论文 前2条
1 张国庆,田泽民,金太学,夏岩昆,程绍轩;混凝土箱梁的温度场[J];东北公路;1999年03期
2 余f雄;柔性墩温度场场形及影响因素的分析[J];江汉大学学报;1998年06期
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