混凝土收缩徐变及施工过程影响的高层框架结构分析

根据某高层混凝土框架结构的特点,建立了该建筑结构的空间有限元计算模型,考虑混凝土收缩、徐变及施工过程分层加载的影响,对该高层混凝土框架结构在竖向荷载作用下的静力性能进行了分析.计算结果表明:与高层混凝土框架结构整体分析相比,考虑混凝土收缩、徐变和施工过程分层加载影响时,该混凝土框架结构的竖向位移、框架梁轴力增加较多,而框架柱轴力变化不大;框架梁的弯矩、剪力变化不显著,框架柱的弯矩、剪力有一定的变化,这些变化应引起工程设计和施工人员的关注.

The analysis of tall building frame structure considering influence of concrete shrinkage creep strain and construction procedure

The paper according to feature of a tall building concrete frame structure, The space finite element calculation model of the structure is established. While the influence of concrete shrinkage creep strain and construction procedure of lamination loaded is considered, The statical mechanics capability of the tall building concrete frame structure under the action of vertical load is analyzed. Computational solution proclaim up: comparing to the global analyses of the tall building concrete frame structure,when the influence of concrete shrinkage creep strain and construction procedure of lamination loaded is considered, the vertical displacement of the frame construction and ax force of frame girder have biggish increase, but the axis force of frame cylinder has a little variation, at the same time, the change of the bending moment and shearing force of the frame girders is inconspicuousness, the bending moment and shearing force have got definite change in the frame pillar. All of changes should be noticed by both engineering designer and builder.