（1 北京市建筑设计研究院有限公司， 北京 100045； 2 北京新机场建设指挥部， 北京 102604）

［摘要］C形柱是北京大兴国际机场航站楼结构的关键构件，航站楼中心区主要靠8个沿中线呈东西对称分布的C形柱支承。为考察C形柱在竖向及水平荷载下的受力和变形性能，采用ABAQUS 6-10有限元软件对其进行竖向及水平极限承载力分析。考虑材料非线性和几何非线性，当材料达到极限应变时，杆件失效退出工作，杆件初始缺陷按杆件长度的1/350施加。结果表明：在大多数情况下，支撑筒破坏晚于C形柱，在C形柱达到极限承载力后，支撑筒作为二道防线继续承担抗侧作用；大震下所有C形柱底部剪力均在承载力的弹性阶段，满足大震不屈服的性能要求。

［关键词］北京大兴国际机场航站楼； C形柱； 抗震性能； 有限元分析

中图分类号：TU391文献标识码：A文章编号：1002-848X(2019)18-0025-07

Non-linear finite element analysis of seismic performance of C-shaped column structure system in Beijing Daxing International Airport terminal building

Zhou Zhongfa1, Yao Yabo2, Shu Weinong1, Zhu Zhongyi1, Qin Kai1, Zhang Lin1, Wang Zhe1, Liang Chenyu1

(1 Beijing Institute of Architectural Design, Beijing 100045, China； 2 Beijing New Airport Construction Headquarters， Beijing 102604， China)

Abstract:C-shaped column is the key component of the structure of Beijing Daxing International Airport terminal building. The central area of the terminal building is mainly supported by eight C-shaped columns symmetrically distributed along the central line. In order to investigate the mechanical and deformation properties of C-shaped columns under vertical and horizontal loads, ABAQUS 6-10 finite element software was used to analyze the vertical and horizontal ultimate bearing capacity of C-shaped columns. Considering material nonlinearity and geometric nonlinearity, when the material reached the limit strain, the member failed to work, and the initial defect of the member was applied according to 1/350 of the length of the member. The results show that in most cases, the failure of the supporting cylinder is later than that of the C-shaped column. After the ultimate bearing capacity of the C-shaped column is reached, the supporting cylinder, as the second line of seismic defense, continues to bear the lateral resistance. Under rare earthquakes, all the shear forces at the bottom of the C-shaped column are in the elastic section of the bearing capacity, which meets the performance requirements of the non-yielding under rare earthquakes.

Keywords:Beijing Daxing International Airport terminal building; C-shaped column; seismic performance; finite element analysis

*北京新机场建设指挥部科技项目（大型交通枢纽复杂结构体系设计及建造关键技术）。

作者简介：周忠发，硕士，高级工程师，一级注册结构工程师，Email：254149547@qq.com。