竖向布置沿高度内缩的某超高层建筑施工模拟分析  

Construction simulation analysis of a super high-rise building with vertical indentations along the height

作　　者：吴玖荣[1] 吴立友 梁强武 Wu Jiurong;Wu Liyou;Liang Qiangwu(Guangzhou University-Tamkang University Joint Research Center for Engineering Structure Disaster Prevention and Control,Guangzhou 510006,China)

机构地区：[1]广州大学-淡江大学工程结构灾害与控制联合研究中心,广州510006

出　　处：《建筑结构》2020年第5期71-76,49,共7页Building Structure

基　　金：国家自然科学基金面上项目( 51778161, 51925802,11972123) 。

摘　　要：以竖向布置沿高度多次内缩的某超高层建筑为研究对象,采用了有限元分析软件ETABS,对该结构进行了全过程的施工模拟力学性能分析。对其分别考虑一次性整体加载、不考虑混凝土收缩徐变和考虑混凝土收缩徐变,各施工楼层的竖向位移、水平位移和部分主要构件内力的变化情况,以及施工至部分主要楼层时考虑外筒框架向阳面与背阳面温差作用对结构水平位移的影响。结果表明:对于竖向布置沿高度多次内缩的超高层建筑结构,对其结构水平位移的分析与对竖向位移的分析同等重要;考虑混凝土收缩徐变时,其对施工期结构竖向变形的影响明显要大于其对结构水平变形的影响,特别是在此类建筑的后期施工和使用阶段;考虑向阳面与背阳面温差与否对结构水平位移影响较为明显。施工模拟分析结果对竖向布置沿高度内缩的超高层建筑在施工期的变形质量控制具有重要的指导意义。Taking a super high-rise building that has multiple vertical indentations along the height as the research object,the finite element analysis software ETABS was used to perform the entire construction simulation mechanical performance analysis of the structure.Impacts of one-time overall loading and shrinkage and creep of concrete were considered respectively on the vertical displacement,horizontal displacement of each construction floor and the change of internal force of some main components.In addition,the influence of the temperature difference between the sunny side and the night side of the outer tube frame on the horizontal displacement of the structure was considered when the construction reached some main floors.The analysis results show that the analysis of horizontal displacement is as important as the analysis of vertical displacement for the super high-rise buildings with multiple vertical indentations along the height;the impact of the shrinkage and creep of concrete on the vertical deformation of the structure during the construction period is significantly greater than the impact on the horizontal deformation of the structure,especially in the later construction and use stage of such buildings;the temperature difference between the sunny side and the night side of the facade has obvious influence on the horizontal displacement of the structure.The construction simulation analysis results had an important guiding significance for the deformation quality control of this kind of super high-rise building with vertical indentations along the height in the construction period.

关 键 词：超高层建筑 施工模拟 收缩徐变 温差 水平位移 竖向位移 

分 类 号：TU375.4[建筑科学—结构工程]