Numerical Evaluation of Progressive Collapse Potential in Reinforced Concrete Buildings with Various Floor Plans Due to Single Column Removal

Document Type : Research Papers

Authors

1 Department of Civil Engineering, Bu-Ali Sina University, 65178-38695 Hamedan, Iran

2 Department of Civil Engineering, Faculty of Engineering, Bu-Ali Sina University, Hamedan, Iran.

3 Center of Structural Engineering Research/Simulation, Department of Civil Engineering, The University of Texas at Arlington, United States

Abstract

Progressive collapse is defined as the spread of an initial damage from one member to another, leading to extensive partial or total collapse of the structure. In this research, the potential of progressive collapse due to a sudden removal of vertical load-bearing elements in reinforced concrete buildings structures with different floor plans such as geometrical regular and irregular floor plans as well as floor plans with and without torsional irregularity were assessed. The buildings were designed according to ACI 318-14 provisions and Iranian seismic code. The progressive collapse potential of the structures was assessed following of a sudden column or shear wall removal in different locations in their first floor using nonlinear dynamic analysis (NDA). Displacement sensitivity and column sensitivity indexes were utilized to compare different cases of load-bearing element removal in each model. Results indicated that in all geometrical regular floor plan, floor plan with reentrant corner and floor plan with torsional irregularity, the most critical case of column removal was removing columns located in outer corners of the plan. In addition, removing external columns was more critical than internal columns. In buildings with shear walls, removing shear walls led to much more critical scenarios than removing columns. Furthermore, results revealed that buildings with torsional irregularity floor plan, designed according to Iranian seismic code, had a lower potential of progressive collapse rather than those buildings with no irregularity.

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References

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Civil Engineering Infrastructures Journal
Volume 51, Issue 2
December 2018
Pages 405-424

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History

  • Receive Date: 17 February 2018
  • Revise Date: 02 May 2018
  • Accept Date: 21 October 2018

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