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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。
Cumulant curves were fitted by MATLAB based on the CEB-FIP model (1990), and then the program of shrinkage and creep was designed by ABAQUS finite element analysis software. For a 40-story steel frame-core tube high-rise mixed structure example The shrinkage and creep analysis and simulation of the construction process, obtained the vertical displacement and the difference between the curve and caused by the shrinkage and creep and the construction process caused by the column and the cylinder between the internal force redistribution curve. The quantitative analysis of vertical displacement and axial force of the cylinder under different environmental humidity, construction period and hybrid structure is given. The analysis results show that the proposed method can calculate the influence of shrinkage and creep and construction process on the vertical displacement and internal force of steel frame - core tube structure more accurately and draw some conclusions that are beneficial to the construction.