Vertical deformation of super high-rise steel reinforced concrete frame-core hybrid structures

被引：0
|
作者：
Li T. [1 ]
Li D. [2 ]
Xu C. [2 ]
Liu B. [1 ]
机构：
[1] School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing
[2] China Construction First Group Construction & Development Co., Ltd, Beijing
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2020年 / 41卷 / 03期
关键词：
Composite structure; Creep and shrinkage; Elastic deformation; Super high-rise building; Vertical deformation;
D O I：
10.14006/j.jzjgxb.2018.0352
中图分类号：
学科分类号：
摘要：
The vertical deformation of super-high-rise steel reinforced concrete frame-core hybrid structures has a significant effect on the long-term safety and stability of the structure. Based on the theoretical analysis of elasticity, creep and shrinkage deformation of concrete, a method for predicting the creep effect of super high-rise buildings with the consideration of the construction process was deduced, and a vertical deformation calculation method of super high-rise hybrid structures was established which considered of the variable load applied by grade cycle. The influence of the construction process on the difference of the vertical deformation of the inner and outer structures was also analyzed. Considering Shenzhen Ping'an Financial Center as the engineering background, the vertical deformation law and deformation difference of the super high-rise hybrid structures were studied. The results show that the prediction of the vertical deformation of the super high-rise hybrid structure agrees well with the actual results, and hence the proposed method can well reflect the long-term vertical deformation and the development of the deformation difference of super high-rise buildings. The vertical deformation follows a fish belly mode with larger deformation in the middle part and smaller deformation at the perimeter. During the construction stage, the maximum vertical deformation occurs in the middle position, and with the increase of the number of years in service, upper floors start to show the maximum vertical deformation. In addition, the elastic compression deformation is the largest, the creep is the second largest, and the shrinkage is the smallest. After the structure is put into use, the proportion of creep and contraction in the total deformation keeps increasing. The creep and shrinkage deformation of Shenzhen Ping'an Financial Center after 50 years for use would have reached 2-3 times of the elastic compression. The vertical deformation of the inner core shear wall is larger than that of the outer frame column, and the shorter the construction period of the single-story structure, the greater the long-term deformation difference of the inner and outer structure, and the more number of the outer frame construction floors ahead of the core tube, the greater the deformation difference. © 2020, Editorial Office of Journal of Building Structures. All right reserved.
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页码：93 / 104
页数：11
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