Advertisement

International Journal of Steel Structures

, Volume 19, Issue 2, pp 517–529 | Cite as

Assessment of Progressive Collapse Behaviour of Moment Frames Strengthened with Knee Elements

  • Peiman Rezazadeh
  • Mohammad R. SheidaiiEmail author
  • Alireza Salmasi
Article
  • 56 Downloads

Abstract

Knee element can be used in junction of beam and column elements for strengthening steel moment frames against progressive collapse. Two different types of knee elements, namely strong and weak knee elements have been used to strengthen the frames. Strong knee element has been designed in a way that it prevents the occurrence of plastic hinge on knee element before beam element. But in weak knee elements, formation of plastic hinge on knee element will be prior to formation of the plastic hinge on the beam element. The nonlinear static alternate path analysis in accordance with the UFC guideline has been used to determine the resistance of structures against progressive collapse. The results indicate the priority of strong knee elements compared to weak knee elements in strengthening the structure against progressive collapse. Installing strong knee element reduces the effective length of beams and columns and changes the direction of flow of forces from the beam–column connection to out of the knees area and changes the position for the formation of plastic hinges. Eventually, the installation of strong knee elements will increase stiffness and structural strength and result in better behaviour against progressive collapse.

Keywords

Progressive collapse Alternate path method Knee elements Nonlinear static analysis Strengthening Plastic hinge 

References

  1. Allen, D. E., & Schriever, W. R. (1972). Progressive collapse abnormal loads and building codes. Ottawa: Division of Building Research, National Research Council.Google Scholar
  2. American Institute of Steel Construction (AISC). (2016a). Seismic provisions for structural steel buildings. ANSI/AISC 341, Chicago, IL.Google Scholar
  3. American Institute of Steel Construction (AISC). (2016b). Specification for structural steel buildings. ANSI/AISC 360-16, Chicago, IL.Google Scholar
  4. American Society of Civil Engineers (ASCE). (2013). Seismic evaluation and retrofit of existing buildings. ASCE /SEI 41-13 New York, USA.Google Scholar
  5. American Society of Civil Engineers (ASCE). (2016). Minimum design loads for buildings and other structures. ASCE7-16, New York.Google Scholar
  6. Ch-Salmasi, A., & Sheidaii, M. R. (2017). Assessment of eccentrically braced frames strength against progressive collapse. International Journal of Steel Structures, 17(2), 543–551.Google Scholar
  7. Ellingwood, B. R. (2006). Mitigating risk from abnormal loads and progressive collapse. Journal of Performance Construction Facility, 20(4), 315–323.Google Scholar
  8. Guo, L., Gao, S., Fu, F., & Wang, Y. (2013). Experimental study and numerical analysis of progressive collapse resistance of composite frames. Journal of Constructional Steel Research, 89(1), 236–251.Google Scholar
  9. Hosseini-Hashemi, B., & Alirezaei, M. (2016). Eccentrically knee bracing: Improvement in seismic design and behavior of steel frames. Journal of Seismology and Earthquake Engineering, 18(3), 149–156.Google Scholar
  10. Hsu, H.-L., & Li, Z.-C. (2015). Seismic performance of steel frames with controlled buckling mechanisms in knee braces. Journal of Constructional Steel Research, 107(1), 50–60.Google Scholar
  11. International Building Code (IBC). (2012). International Code Council, ICC, USA.Google Scholar
  12. Kazemi-Moghaddam, A., & Sasani, M. (2015). Progressive collapse evaluation of Murrah Federal Building following sudden loss of column G20. Engineering Structures, 89, 162–171.Google Scholar
  13. Khandelwal, K., El-Tawil, S., & Sadek, F. (2009). Progressive collapse analysis of seismically designed steel braced frames. Journal of Constructional Steel Research, 65(3), 699–708.Google Scholar
  14. Kim, J., & An, D. (2009). Evaluation of progressive collapse potential of steel moment frames considering catenary action. Structural Design of Tall and Special Buildings, 18(4), 455–465.Google Scholar
  15. Kim, J., & Kim, T. (2009). Assessment of progressive collapse resisting capacity of steel moment frames. Journal of Constructional Steel Research, 65(1), 169–179.Google Scholar
  16. Kim, J., & Lee, Y. (2010). Progressive collapse resisting capacity of tube-type structures. The Structural Design of Tall and Special Buildings, 19(1), 761–777.Google Scholar
  17. Kim, J., Lee, Y., & Choi, H. (2011a). Progressive collapse resisting capacity of brace frames. The Structural Design of Tall and Special Buildings, 20(1), 257–270.Google Scholar
  18. Kim, J., Park, J. H., & Lee, T. H. (2011b). Sensitivity analysis of steel buildings subjected to column loss. Engineering Structures, 33(2), 421–432.Google Scholar
  19. Leelataviwat, S., Suksan, B., Srechai, J., & Warnitchai, P. (2011). Seismic design and behavior of ductile knee-braced moment frame. Journal of Structural Engineering, 137(5), 579–588.Google Scholar
  20. Liu, M., & Pirmoz, A. (2016). Energy-based pulldown analysis for assessing the progressive collapse potential of steel frame buildings. Engineering Structures, 123(1), 372–378.Google Scholar
  21. Nobahar, E., Farahi, M., & Mofid, M. (2016). Quantification of seismic performance factors of the buildings consisting of disposable knee bracing frames. Journal of Constructional Steel Research, 124(1), 132–141.Google Scholar
  22. The U.S. General Service Administration (GSA). (2005). Progressive collapse analysis and design guidelines for new federal office buildings and major modernization projects. Washington, D.C.Google Scholar
  23. Unified facility criteria (UFC). (2016). Design of building to resist progressive collapse. Washington, D.C.: Department of Defence (DOD).Google Scholar

Copyright information

© Korean Society of Steel Construction 2018

Authors and Affiliations

  • Peiman Rezazadeh
    • 1
  • Mohammad R. Sheidaii
    • 2
    Email author
  • Alireza Salmasi
    • 2
  1. 1.Department of Civil Engineering, Tehran BranchAzad UniversityUrmiaIran
  2. 2.Department of Civil EngineeringUrmia UniversityUrmiaIran

Personalised recommendations