论文部分内容阅读
温度变化和混凝土收缩徐变对连续刚构桥主梁的变形及内力产生较大影响。该文结合贵州赫章特大桥工程实例,介绍了应变修正剔除的方法,通过对箱梁截面划分网格计算温度系数,从而通过程序进行立模修正;根据中性轴的应力可以利用预应力张拉前后的应变直接测量,而与主梁重量无关的特点来对混凝土徐变系数进行识别,从而得到混凝土徐变应变。
Temperature variation and concrete shrinkage and creep have a significant impact on the deformation and internal forces of the main girder of continuous rigid frame bridge. According to the project of Hezhang Bridge in Guizhou, this paper introduces the method of strain correction elimination, and calculates the temperature coefficient by meshing the section of box girder to make the vertical correction by the program. According to the stress of neutral axis, Before and after the pull of the direct measurement of strain, and the weight of the main beam has nothing to do with the characteristics of concrete creep coefficient identification, so as to get concrete creep strain.