超高层结构考虑钢管混凝土柱收缩徐变影响的施工模拟分析
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摘要
在超高层结构施工过程中,材料的时变特性和其他荷载等因素是导致竖向构件变形差异的主要原因。以南宁华润中心东写字楼超高层项目为工程背景,运用MIDAS Gen软件对项目进行施工模拟分析。由于钢管混凝土柱中混凝土处于密封状态,从而收缩徐变受到抑制,计算时考虑组合材料的收缩徐变得不到合理的结果。考虑钢管混凝土柱中混凝土的收缩徐变,利用双单元法对钢管混凝土柱进行施工模拟分析,并和换算截面法考虑收缩徐变和换算截面法不考虑收缩徐变分析的结果进行对比,分析三个模型的合理性,进而为钢管混凝土结构施工模拟分析提供参考。
During the construction process of super high-rise building structures, the time-varying characteristics of materials and other loads are the main factors leading to the difference in the deformation of vertical members. Taking east office building of Nanning Huarun Center super high-rise project as the engineering background, the MIDAS Gen software was used to simulate the construction process. The concrete shrinkage and creep of concrete filled steel tubular column are restrained because the concrete in concrete filled steel tubular column is sealed, so it can not get the reasonable results when considering the shrinkage and creep of composite materials in calculation. Considering the shrinkage and creep of concrete in concrete filled steel tubular column, the construction simulation analysis of concrete filled steel tubular columns was carried out by using the dual element method, and the results were compared with those of the transformation section method considering shrinkage and creep and the transformation section method not considering the shrinkage and creep, and the rationality of the three models was analyzed, which can provide reference for the construction simulation analysis of concrete filled steel tubular structures.
During the construction process of super high-rise building structures, the time-varying characteristics of materials and other loads are the main factors leading to the difference in the deformation of vertical members. Taking east office building of Nanning Huarun Center super high-rise project as the engineering background, the MIDAS Gen software was used to simulate the construction process. The concrete shrinkage and creep of concrete filled steel tubular column are restrained because the concrete in concrete filled steel tubular column is sealed, so it can not get the reasonable results when considering the shrinkage and creep of composite materials in calculation. Considering the shrinkage and creep of concrete in concrete filled steel tubular column, the construction simulation analysis of concrete filled steel tubular columns was carried out by using the dual element method, and the results were compared with those of the transformation section method considering shrinkage and creep and the transformation section method not considering the shrinkage and creep, and the rationality of the three models was analyzed, which can provide reference for the construction simulation analysis of concrete filled steel tubular structures.
引文
[1]周绪红,黄湘湘,王毅红,等.钢框架-钢筋混凝土核心筒体系竖向变形差异的计算[J].建筑结构学报,2005,26(2):66-73.
[2]任瑞,刘冰.超高层混合结构考虑施工过程的竖向变形差异计算和分析[J].结构工程师,2013,29(2):56-62.
[3]张文华,黄忠海,刘付钧,等.超高层框架核心筒结构混凝土长期收缩徐变效应分析[J].结构工程师,2016,32(1):169-175.
[4]高层建筑混凝土结构技术规程:JGJ 3-2010[S].北京:中国建筑工业出版社,2011.
[5]CEB-FIP model code 1990[S].London:Thomas Telford,1993.
[6]Prediction of creep,shrinkage and temperature effect in concrete structure[S].Farmington Hills:American Concrete Institute,1992.
[7]公路钢筋混凝土及预应力混凝土桥涵设计规范:JTGD62-2004[S].北京:人民交通出版社,2004.
[2]任瑞,刘冰.超高层混合结构考虑施工过程的竖向变形差异计算和分析[J].结构工程师,2013,29(2):56-62.
[3]张文华,黄忠海,刘付钧,等.超高层框架核心筒结构混凝土长期收缩徐变效应分析[J].结构工程师,2016,32(1):169-175.
[4]高层建筑混凝土结构技术规程:JGJ 3-2010[S].北京:中国建筑工业出版社,2011.
[5]CEB-FIP model code 1990[S].London:Thomas Telford,1993.
[6]Prediction of creep,shrinkage and temperature effect in concrete structure[S].Farmington Hills:American Concrete Institute,1992.
[7]公路钢筋混凝土及预应力混凝土桥涵设计规范:JTGD62-2004[S].北京:人民交通出版社,2004.