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

发布时间：2018-06-12 07:04

本文选题：钢框架-混凝土核心筒混合结构 + 竖向变形　；参考：《工业建筑》2017年11期

【摘要】：目前考虑收缩徐变影响的钢框架-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-混凝土核心筒混合结构竖向变形。首先建立钢框架-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。
[Abstract]:At present, the research on vertical deformation of steel-frame-concrete core-tube hybrid structure considering the effect of shrinkage and creep is mostly carried out through the establishment of more complicated finite element model, but the research through simplified analysis is rare. A simplified model is proposed to study the vertical deformation of steel frame-concrete core-tube composite structures considering the effect of shrinkage and creep. Firstly, a simplified model of steel frame-concrete core-tube hybrid structure is established. Based on the simplified model, a simplified formula for calculating the vertical displacement of floors and the vertical displacement difference between the steel frame column and the core tube is derived, which takes into account the influence of shrinkage and creep. Then according to the structural model of Dalian Ocean Tower, the vertical deformation characteristics of the structure are analyzed by simplified analysis method, and the accuracy of simplified analysis is investigated based on the vertical deformation obtained by MIDAS-Gen analysis. The results show that the variation law of vertical displacement and vertical displacement difference with floor based on simplified analysis is basically the same as that of finite element analysis, and the error is within the acceptable range of engineering.
【作者单位】：北京工业大学建筑工程学院;北京城建勘测设计研究院有限责任公司;
【分类号】：TU973

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