西安金融中心超高层施工竖向变形分析研究  

Analysis and research on vertical deformation in construction process of super high-rise structure of Xi 'an Financial Center

作　　者：张莉莉 马锦姝 巴盼锋 王泽强[2] 陈新礼[2] 梁权[1] 

机构地区：[1]北京建工四建工程建设有限公司,北京100075 [2]北京市建筑工程研究院有限责任公司,北京100039

出　　处：《建筑结构》2017年第21期36-41,共6页Building Structure

基　　金：国家自然科学基金项目(51178205)

摘　　要：为在施工过程中采取有效的竖向变形控制措施,控制完工后结构实际标高与设计标高的差异值在一定范围内,并减小因核心筒与巨柱竖向变形差引起的结构附加应力,选取CEB-FIP预测模型,根据实际施工进度建立结构有限元分析模型,考虑混凝土收缩徐变、施工找平等因素,综合有限元法、单元生死、分步加荷等技术对不同施工模拟方案下的西安金融中心结构进行材料、几何及边界条件时变模拟,得到了施工过程中结构各层竖向变形以及核心筒与巨柱竖向变形差的具体数值及变化规律。分析结果表明,混凝土收缩徐变对结构竖向变形影响较大,在整个施工过程中所占比例为47.33%~58.59%;在对计算结果进行深入研究的基础上,给出预变形控制建议措施,对后续巨柱核心筒结构超高层施工具有指导意义。In order to take effective measures to control the vertical deformation in construction process,realize difference value between actual level and the design elevation within a certain range and reduce the structural additional stress caused by the vertical deformation difference between corewall and giant column,CEB-FIP prediction model was selected and the structural finite element analysis model was established according to the actual construction progress,considering concrete shrinkage and creep and leveling of construction. Finite element method,element birth and death,step-by-step loading technologies were used to conduct time-varying simulation on Xi＇ an Financial Center structure under different construction simulation schemes based on material,geometry and boundary conditions. Specific values and change rule of the each layer＇s vertical displacement in construction process and the vertical deformation difference between corewall and giant column were got. Analysis results show that the effect of shrinkage and creep of concrete on vertical deformation is big,accounting for the proportion of 47. 33% ~ 58. 59% in the whole construction process. Base on in-depth research on the calculation results,suggestions on pre-deformation control measures were provided,which has a guiding significance for subsequent construction of super high-rise structure with giant column and corewall structure.

关 键 词：超高层 竖向变形 收缩 徐变 施工仿真分析 变形控制 

分 类 号：TU973.23[建筑科学—结构工程]