高墩大跨连续刚构桥的温度效应研究

【作者】 蔡建钢；

【导师】 陈偕民；

【作者基本信息】 长安大学 ， 桥梁与隧道工程， 2005， 硕士

【摘要】 高墩大跨连续刚构桥应用日趋广泛,已成为现代交通工程中的一种重要桥型。然而,国内外有关桥梁温度效应方面的规范不统一,按各种不同规范计算的结果出入较大。本论文以陕西合阳徐水沟特大桥为工程背景,根据不同的规范计算上部箱梁的日照温度效应,分析比较各规范计算结果之间的差异,得出上部箱梁在日照温差荷载作用下温度应力与温度变形的分布规律;选取不同的日辐射方向,计算下部空心薄壁高墩的日照温度效应,得出下部高墩在日照温差荷载作用下温度应力与温度变形的分布规律;最后计算全桥的年温度效应影响,并与日照温度效应的影响进行比较。 希望本论文的研究可以为以后高墩大跨连续刚构桥的设计中温度效应问题的解决提供一定的理论依据和技术参考;为相关的规范标准的进一步完善提供一定的合理性意见,以加速高墩大跨连续刚构桥的温度效应理论的发展和完善。更多还原

【Abstract】 The application of tall-pier and long-span continuous rigid-frame bridges is apparently wide, and it had becoming an important bridge style in modern communication engineering. However, because of the domestic and foreign design codes concerning the bridge temperature effect is disunity, the results according to the different norms are various. Based on the Xu Shui Gou Bridge in ShanXi He yang, calculate the sunshine temperature effect of the upper box girder , analyze the difference between results on each norms, and educe the upper box girder’ s distributed regulation about temperature stress and temperature deformation for the sunshine temperature effect; Select the different day radiates’ direction, calculate the sunshine temperature effect of the lower part tall-pier with thin wall, and educe it’ s distributed regulation about temperature stress and temperature deformation for the sunshine temperature effect; Compute the temperature effect influence of year of the whole bridge finally, and carry on the comparison with the influence of the sunshine temperature effect.The research founding is hoped to provide the certain theories according to and the technique reference for solving the problem of temperature effect in designing of the tall-pier and long-span continuous rigid-frame bridges in the later, and provide the certain rationality opinion for the related norm standard of further perfect, and to accelerate the development and perfected of the temperature effect theories of the tall-pier and long-span continuous rigid-frame bridge.更多还原