鋼框架-核心筒結構考慮施工影響的收縮徐變分析*
張望喜，譚澤騰，薛凱
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(湖南大學土木工程學院, 長沙 410082)
［摘要］使用MATLAB基于CEB-FIP模型（1990）擬合出徐變曲線，然后通過ABAQUS有限元分析軟件二次設計了收縮徐變計算程序，針對一個40層鋼框架核心筒的高層混合結構算例進行了收縮徐變分析并模擬了施工過程，得出了豎向位移及其差值的變化曲線及由收縮徐變和施工過程引起的框架柱與筒體之間內力重分布曲線。給出了不同環(huán)境濕度、施工周期及混合結構中是否考慮筒體提前施工時的豎向位移和軸力的定量分析。分析結果表明，提出的方法可以比較準確地計算出收縮徐變及施工過程對鋼框架核心筒結構豎向位移和內力的影響，并得出一些有益于工程施工的結論。［關鍵詞］鋼框架-核心筒; 收縮; 徐變; 混合結構; 施工模擬中圖分類號：TU398.7 文獻標識碼：A 文章編號：1002-848X(2015)20-0046-06
Analysis on shrinkage and creep of steel frame-core tube structures considering the effects of constructionZhang Wangxi, Tan Zeteng, Xue Kai(Civil Engineering College of Hunan University, Changsha 410082, China)Abstract: The creep curve was fitted by using MATLAB based on CEB-FIP model(1990). Then a 40-story steel frame-core tube high-rise hybrid structure model was done based on the design of the shrinkage and creep calculating program by using ABAQUS finite element analysis software to conduct the analysis of shrinkage and creep and simulated construction process, therefore the variable curves of vertical displacement and vertical displacement differentials and the internal force redistribution curve between frame column and the core-wall were obtained, which caused by construction and shrinkage-and creep. The quantitative analysis of vertical displacement and axial force for different parameters, like environment humidity, construction cycles and the considering of the in-advanced construction of core-wall in the hybrid structure were conducted. The results show that the suggested method can calculate the effects of shrinkage and creep and construction process on the vertical displacement and internal forces of steel frame-core tube structures properly, and some conclusions that beneficial to construction were obtained.Keywords: steel frame-core tube; shrinkage; creep; hybrid structure; construction process simulation
*國家自然科學基金項目（51078133，51208190，51338004）。作者簡介：張望喜，博士，副教授，Email:wxizhang2000@163.com。
