摘要
高层建筑施工过程较长,混凝土徐变、收缩等时间效应对高层建筑的竖向变形影响较大。基于欧洲规范CEB-FIP 90,分析了混凝土收缩、徐变效应与相对湿度、构件尺寸、含钢率、混凝土加载龄期、混凝土强度等级等因素的关系。为准确得到高层建筑逐层施工、逐层找平过程中的变形,采用SAP2000对南宁天龙财富中心高层建筑进行考虑收缩、徐变效应的施工模拟分析。结果表明：上部楼层混凝土收缩、徐变效应导致的变形占竖向变形的比例较大。为减小构件竖向变形差对水平构件的影响,根据变形补偿的思想计算了各层竖向构件的下料预留长度。
High-rise building construction process is long,and concrete creep,shrinkage and other time effects have great impact on the vertical deformation of high-rise buildings. Based on European standard CEB-FIP 90,the relationship between shrinkage and creep effects of concrete and relative humidity,component size,steel content,concrete loading age and concrete strength grade were analyzed. In order to accurately get the deformation of the high-rise building in process of layer-by-layer construction with layer-by-layer leveling,SAP2000 was used to simulate the shrinkage and creep effects of the high-rise building of Tianlong Fortune Plaza in Nanning. The results show that the deformation caused by shrinkage and creep of the upper storey accounts for a larger proportion of the vertical deformation. In order to reduce the influence of the vertical deformation of the members on the horizontal members,the reserved length of the vertical members of each layer is calculated according to the idea of deformation compensation.
出处
《建筑结构》
CSCD
北大核心
2018年第1期21-25,共5页
Building Structure
关键词
徐变
收缩
施工模拟
竖向变形差
变形补偿
creep
shrinkage
construction simulation
vertical displacement difference
deformation compensation
