ANALYSIS OF CREEP EFFECT ON TALL BUILDING STRUCTURES
There may exist large distinction and asymmetrical distribution of the compressive stress level in the vertical members in some tall R.C. buildings. Under long-term gravity loads, concrete creep effect could cause large structural sideway and incline deformation. As a result, not only would the long-term service of the buildings be influenced, but also hidden security trouble would be induced. Combined with a set of simple and reasonable creep mode and energy principle, the analysis method and essential cause of structural sideway and incline deformation due to creep are presented clearly. Then some technical measures, including adjusting columns reinforcement ratios, section sizes and concrete grades, are given and proved to effectively reduce structural sideway and incline. Based on the above theoretical analysis, the creep effect on a super tall building in Qatar is deeply researched. The 231m high complex structure originates the first exterior tube structure composed by reinforced concrete diagonal cross columns, prestressed ring beams and steel composite floors in the world. The prediction of creep effect on the whole structure shows that the originally designed structure, according to the original tender, would induce distinct sideway and incline, influence the buildings service ability and even cause security trouble. Combined with the project requirement, several adjustment methods are synthetically adopted. The actual application shows that the presented mechanisms and analysis methods are clear, practical and effective. The research results are directly applied to guide the actual project design and construction, and could also become design reference of other complex tall building structures.
tall building, concrete creep compressive stress asymmetrical distribution sideway and incline
Can Sun Xueyi Fu
Harbin Institute of Technology, China Shenzhen University, China
国际会议
The 9th International Conference on Steel Space & Composite Structures(第九届国际钢材、空间结构、组合结构会议)
烟台·北京
英文
93-101
2007-10-10（万方平台首次上网日期，不代表论文的发表时间）