Volume 5, Issue 4, July 2017, Page: 235-241
Research on the Vertical Setback Problem of Steel Bundled Tube Structure
Hao Yong, The Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing, China; College of Civil Engineering, Hebei Insititute of Architecture and Civil Engineering, Zhangjiakou, China
Li Yansong, College of Civil Engineering, Hebei Insititute of Architecture and Civil Engineering, Zhangjiakou, China
Jiu Zhenggang, College of Civil Engineering, Hebei Insititute of Architecture and Civil Engineering, Zhangjiakou, China
Zhang Tao, Department of Building Engineering, Qiqihar Insititute of Engineering, Qiqihar, China
Wang Futian, Zhangjiakou City High-Grade Highway Asset Management Center, Zhangjiakou, China
Zhang Xusheng, Zhangjiakou City High-Grade Highway Asset Management Center, Zhangjiakou, China
Received: Aug. 13, 2017;       Published: Aug. 14, 2017
DOI: 10.11648/j.ajce.20170504.17      View  2252      Downloads  126
Abstract
To study the mechanical performance of steel bundled-tube structures and find the reasonable setback scheme, the 18 calculation model with different setback based on the same bottom, height as well as the volume were designed. The effect of different setback methods on performance indexes such as natural vibration period of the structure, stiffness was analyzed. Stress total enhancement ratio and reference enhancement ratio are introduced to study the distribution rule of the spandrel beam stress under different vertical setback methods. The distribution rule of column stress was also analyzed. The results show that the changing rule of the equivalent wind effect coefficient is the same as the basal shearing force and basal anti-overturning moment. Reference enhancement ratio of the spandrel beam is a fixed value at a certain height and volume. Total stress enhancement ratio of the spandrel beam is mainly related to the remained height. Vertical setback causes abrupt stress in the columns. The setback influence on the columns is less than that on the beams, and the abrupt stress stories are also less. It is advised that the location of the initial setback should be as far as possible from the embedded end. The reasonable setback method should be uniform and symmetric.
Keywords
Steel Bundled-Tube, Vertical Setback, Mechanical Performance, Stress Enhancement Ratio
To cite this article
Hao Yong, Li Yansong, Jiu Zhenggang, Zhang Tao, Wang Futian, Zhang Xusheng, Research on the Vertical Setback Problem of Steel Bundled Tube Structure, American Journal of Civil Engineering. Vol. 5, No. 4, 2017, pp. 235-241. doi: 10.11648/j.ajce.20170504.17
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