Assessment on the Progressive Collapse Resistance of a Long-Span Curved Spatial Grid Structure with Main Trusses

被引:1
|
作者
Zhou, Guangpan [1 ]
Song, Qianen [2 ]
Li, Aiqun [3 ,4 ]
Shen, Shungao [5 ]
Zhou, Qing [5 ]
Wang, Bin [1 ]
机构
[1] Nanjing Univ Sci & Technol, Sch Sci, Nanjing 210094, Peoples R China
[2] Nanjing Architectural Design & Res Inst Co Ltd, Nanjing 210014, Peoples R China
[3] Southeast Univ, Sch Civil Engn, Nanjing 210096, Peoples R China
[4] Beijing Univ Civil Engn & Architecture, Beijing Adv Innovat Ctr Future Urban Design, Beijing 100044, Peoples R China
[5] China Aviat Planning & Design Inst Grp Co Ltd, Beijing 100120, Peoples R China
基金
中国国家自然科学基金;
关键词
Long-span; Spatial grid; Truss; Concrete; Sensitivity analysis; Progressive collapse;
D O I
10.1007/s12205-021-5371-1
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The progressive collapse resistance of the terminal building of Zhongchuan Airport in Lanzhou, China was studied, which is a long-span curved spatial grid structure with main trusses. Firstly, the finite element model was built using MSC. Marc software adopting the fiber model based on material. Secondly, an improved method of zoned concept judgment and sensitivity analysis was proposed to determine the key components. Thirdly, the initial failure components were removed individually based on the alternate load path method (AP method). The responses of remaining structure were calculated using nonlinear dynamic analysis method. Lastly, the influences brought by the cross-sectional sizes of grid members were investigated through conducting parametric analysis. According to the results, the proposed selection method can avoid omitting the key components. The structural responses are significant when removing the concrete filled steel tubular (CFST) column SC14 directly supporting the front middle part of the roof, with a maximum vertical displacement of 10 m at cantilever end, which should be focused on for this kind of large-span spatial structure. In addition, the tensile strength and cross-sectional area of the upper and lower chords should be increased by 20% to enhance the progressive collapse resistance of the structure, and the changes of axial compression ratios of the columns supporting the roof have little effects.
引用
收藏
页码:1239 / 1253
页数:15
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