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基于简化模型的钢框架-混凝土核心筒混合结构竖向变形计算

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基于简化模型的钢框架一混凝土核心筒 混合结构竖向变形计算 张文学1 (1.北京工业大学建筑工程学院,北京 闰文哲1 武道凯2 赵玉红1 100101) 100124;2.北京城建勘测设计研究院有限责任公司,北京 摘要:目前考虑收缩徐变影响的钢框架一混凝土核心筒混合结构竖向变形的研究,大多是通过建立较 为复杂的有限元模型进行分析,而通过简化分析的研究则很少。着眼于工程实际应用,提出简化模型,通过 简化分析来研究考虑收缩徐变影响的钢框架一混凝土核心筒混合结构竖向变形。首先建立钢框架一混凝土 核心筒混合结构的简化模型,基于简化模型推导考虑收缩徐变影响的楼层竖向位移及钢框架柱与核心筒竖 向位移差简化计算公式,然后依据大连远洋大厦结构模型,用简化分析方法分析了该结构的竖向变形特征, 并以MIDAS/Gen分析所得的结构竖向变形为基准,考察了简化分析的准确性。结果表明:基于简化分析的竖 向位移及竖向位移差随楼层的变化规律与有限元分析结果基本相同,误差在工程可接受的范围内。 关键词:钢框架一混凝土核心筒混合结构;竖向变形;收缩徐变;简化分析 DoI:10.13204/j.gYJz201711036 VERTICAL DEFORMATIoN CALCULATIoN oF STEEL FRAME.CoNCRETE CoRE WALL HYBRID STRUCTURE BASED ON SIMPLIFIED MoDEL ZHANG Wenxue‘YAN Wenzhel WU Daokai2 ZHAO Yuhon91 (1.College 2.Beijing of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China; Urban Construction Exploration,Survey,Design&Research Institute Co.Ltd,Beijing 100101,China) Abstract:The present and researches shrinkage on vertical deformation by of steel frame-concrete finite element core wall hybrid the structure considering creep conducted by paper,which are usually conducted on complex model,while model core researches the simplified analysis was are rare.Focusing the veflieal actual application,a of simplified was presented in used to calculate displacement steel frame—concrete wall hybrid structure considering creep and shrinkage.Based relative vertical the steel floor displacement core on the simplified model,the formulas of the vertical floor displacement and on were firstly derived.To investigate the accuracy of simplified analysis,based model of a frame?concrete wall hybrid structure Yuanyang as Building,the vertical deformation was calculated by simplified analysis and MIDAS/Gen finite element method comparison.The results showed that the trends of vertical floor displacement and relative vertical element method could be applied respectively to were floor displacement was obtained by simplified analysis and finite the same.And the error acceptable for actual application.The research results practical engineering. core Keywords:steel frame—concrete analysis wall hybrid structure;vertical deformation;creep and shrinkage;simplified 钢框架一混凝土核心筒混合结构可以充分发挥 钢结构与混凝土剪力墙结构的优势,在高层以及超 高层建筑中得到了越来越多的应用。混凝土具有钢 材所不具有的收缩徐变性质,因而,混凝土核心筒除 了弹性变形外,还要发生收缩徐变变形。由于混凝 土与钢材材料性质的差异,混凝土核心筒与钢框架 柱将在竖向荷载作用下产生竖向变形差异。 JGJ 1 96 11.3.3条规定:“计算竖向变形差异时宜考虑混凝 土收缩、徐变、沉降及施工调整等因素的影响”;第 13.10.7条规定:“钢框架一钢筋混凝土筒体结构施 工时,应考虑内外结构的



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