钢框架-核心筒结构考虑施工影响的收缩徐变分析*
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(湖南大学土木工程学院, 长沙 410082)
［摘要］使用MATLAB基于CEB-FIP模型（1990）拟合出徐变曲线，然后通过ABAQUS有限元分析软件二次设计了收缩徐变计算程序，针对一个40层钢框架核心筒的高层混合结构算例进行了收缩徐变分析并模拟了施工过程，得出了竖向位移及其差值的变化曲线及由收缩徐变和施工过程引起的框架柱与筒体之间内力重分布曲线。给出了不同环境湿度、施工周期及混合结构中是否考虑筒体提前施工时的竖向位移和轴力的定量分析。分析结果表明，提出的方法可以比较准确地计算出收缩徐变及施工过程对钢框架核心筒结构竖向位移和内力的影响，并得出一些有益于工程施工的结论。［关键词］钢框架-核心筒; 收缩; 徐变; 混合结构; 施工模拟中图分类号：TU398.7 文献标识码：A 文章编号：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
*国家自然科学基金项目（51078133，51208190，51338004）。作者简介：张望喜，博士，副教授，Email:wxizhang2000@163.com。
