非荷载作用对超高层方钢管混凝土结构的影响  

INFLUENCE OF NON-LOAD ACTION ON SUPER HIGH RISE BUILDINGS CONCRETE-FILLED SQUARE STEEL TUBE STRUCTURE

作　　者：李强[1] 周婷[2] 陈志华[1,3] 刘浩男 LI Qiang;ZHOU Ting;CHEN Zhihua;LIU Haonan(School of Civil Engineering,Tianjin University,Tianjin 300072,China;School of Architecture,Tianjin University,Tianjin 300072,China;Key Laboratory of Coastal Structures in Civil Engineering and Safety of Ministry of Education,Tianjin University,Tianjin 300072,China;China Architecture Design&Research Group,Beijing 100044,China)

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津大学建筑学院,天津300072 [3]天津大学滨海土木工程结构与安全教育部重点实验室,天津300072 [4]中国建筑设计研究院有限公司,北京100044

出　　处：《工业建筑》2020年第12期150-159,共10页Industrial Construction

基　　金：国家重点研发计划项目(2017YFC0703800)。

摘　　要：为研究非荷载作用对超高层建筑带来的影响,通过ANSYS数值模拟以及对监测数据进行分析。首先针对钢管混凝土柱构件,通过ASHREA晴空模型和CEB-FIP(90)预测模型分别引入温度作用和混凝土徐变作用,进行有限元分析。结果表明构件水平变形受非均匀温度场影响,随截面增大而降低,大于900 mm后趋于平缓,并随柱长的增加而快速增大。其次,通过对结构层面的分析,提出一种简化计算方法,并以津湾广场9号楼为背景进行模拟分析。分析表明:构件非均匀温度场的影响仅限于局部应力,对结构整体作用较小;对津湾广场9号楼的温度和应力监测结果进行分析,验证有限元模拟结果的有效性。最后通过进一步参数分析,认为结构封顶时厚涂型防火涂料施工进度达到全高的一半以上,可在设计中适当忽略温度作用的影响。In order to study the influence of non load action on super high-rise buildings,this paper analyzed the monitoring data and ANSYS numerical simulation.Firstly,for CFST columns,ASHREA clear sky model and CEB-FIP(90)prediction model were used to analyze the temperature effect and concrete creep effect respectively.The results showed that the horizontal deformation of the component was affected by the non-uniform temperature field,which decreased with the increase of the cross-section,tended to be gentle when it was larger than 900 mm,and increased rapidly with the increase of the column length.For the analysis of structural level,this paper proposed a simplified calculation method,which was based on the simulation analysis of Building 9 of Jinwan square.It was considered that the influence of non-uniform temperature field of components was only limited to local stress,which had little effect on the whole structure;the temperature and stress monitoring results of Building 9 of Jinwan square were analyzed to verify the above-mentioned finite element simulation results.Through further parameter analysis,it was considered that the construction progress of thick coating fire retardant coating reached more than half of the total height when the structure was capped,and the temperature effect could be properly ignored in the design.

关 键 词：钢管混凝土柱 超高层建筑 温度作用 混凝土收缩徐变 施工监测 

分 类 号：TU973[建筑科学—结构工程]