超高层混凝土建筑收缩徐变效应分析

发布时间：2018-02-26 11:30

本文关键词： 超高层混凝土建筑收缩徐变含钢率分段补偿法　出处：《建筑结构》2017年S1期 　论文类型：期刊论文

【摘要】：超高层混凝土建筑无法通过铰接、后安装等措施释放收缩、徐变效应导致的附加变形、附加内力。CEBFIP Model Code 90、CEB-FIP Model Code 2010与ACI209规范对混凝土收缩、徐变效应的计算公式不同,考虑的参数也不同,但计算方法类似。考虑混凝土构件的含钢率后,收缩、徐变效应会随着含钢率的增大而降低。超高层混凝土建筑可采用分段补偿法施工,将每一分段内各层竖向构件的施工预留长度之和在分段底层内进行补偿,以降低混凝土收缩、徐变效应导致的竖向构件变形差,确保结构安全。
[Abstract]:The extra deformation caused by the effect of shrinkage and creep can not be released by means of hinge and post installation. The additional internal force. CEBFIP Model Code 90 CEB-FIP Model Code 2010 is different from ACI209 code in calculating the shrinkage and creep effect of concrete. The parameters considered are different, but the calculation method is similar. Considering the steel content of concrete members, the effect of shrinkage and creep will decrease with the increase of steel content. In order to reduce the deformation difference of vertical members caused by shrinkage and creep of concrete and ensure the safety of the structure, the sum of the construction reserved length of each layer of vertical members in each section is compensated in the bottom layer of the section.
【作者单位】：悉地国际设计顾问(深圳)有限公司;
【分类号】：TU528;TU974

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