Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (9): 1350-1354.DOI: 10.12068/j.issn.1005-3026.2014.09.030

• Resources & Civil Engineering • Previous Articles     Next Articles

Dynamic Increase Factor During the Progressive Collapse of RC Frame Structures

XIAO Shiyun, DONG Huahang, LIU Jinfeng   

  1. Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China.
  • Received:2013-07-25 Revised:2013-07-25 Online:2014-09-15 Published:2014-04-11
  • Contact: XIAO Shiyun
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Abstract: The specification of dynamic increase factor(DIF)during the progressive collapse design of RC frame structures was studied, and the influence of maximum plastic angle, height, width, reinforcement ratio and the lengths of bay were studied systematically. The results demonstrate that the DIF of different models has the same trend and the maximum is about 113, which is far less than that given by the GSA Standard. The DIF decreases with the increasing plastic angle but increases with the increasing reinforcement ratio. The dynamic effect of RC structures after removing the corner column is greater than that after removing the interior column. Other factors, such as the aspect ratio, the lengths of bay, the section sizes and the loading pattern, have no significant influence on the DIF.

Key words: RC frame structure, progressive collapse, dynamic effect, dynamic increase factor(DIF), alternate load path method

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