Volume 3, Issue 1 (9-2018)                   NMCE 2018, 3(1): 47-57 | Back to browse issues page


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Mohammadi A, Pachenari A, Sadeghi B. Stress distribution and failures in partially overloaded support-removed flat slab floors. NMCE 2018; 3 (1) :47-57
URL: http://nmce.kntu.ac.ir/article-1-186-en.html
1- M.Sc in Structural Engineering, Department of civil engineering, University of Kashan, Kashan, Iran.
2- Assistant Professor, Department of civil engineering, University of Kashan, Kashan, Iran. , pachenaria@kashanu.ac.ir
3- M.Sc student in Structural Engineering, Department of civil engineering, University of Kashan, Kashan, Iran.
Abstract:   (806 Views)
Although concrete slabs have an extensive use in structures due to their architectural and executive benefits, the suitability of their behavior against the progressive collapse phenomenon has always been questioned. This study numerically investigates the step-by-step behavior of a support-removed flat slab floor with square panels under the effect of partial overloading. After validation of the modeling method, parts of the designed floor are exposed to increasing downward and uniformly distributed loading during three separate analyses that correspond to the removal of supporting corner, penultimate and interior columns. The pattern of stress in the slab reinforcement and propagation of cracks in the concrete are presented. The findings showed high concentration of slab damage around the corner columns located in the perimeter of overloaded panels and highlighted the role of slab add bars embedded in the vicinity of exterior columns against failure. It was also shown that, unlike the frame-type structural systems, stress redistribution occurs considerably along the diagonals of the slab panels directly connected to the failed support.
Full-Text [PDF 1851 kb]   (527 Downloads)    
Type of Study: Research | Subject: General
Received: 2018/02/6 | Revised: 2018/05/27 | Accepted: 2018/08/6 | ePublished ahead of print: 2018/08/20

References
1. [1] American Concrete Institute, Building Code Requirements for Structural Concrete (ACI 318-14): Commentary on Building Code Requirements for Structural Concrete (ACI 318R-14): an ACI Report. American Concrete Institute. ACI. 2014.
2. [2] Bredean, L. A., & Botez, M. D., "The influence of beams design and the slabs effect on the progressive collapse resisting mechanisms development for RC framed structures", Engineering Failure Analysis, 2018, vol. 91, pp. 527-542. [DOI:10.1016/j.engfailanal.2018.04.052]
3. [3] Hawkins, N. M., and Mitchell, D., "Progressive collapse of flat plate structures", In Journal Proceedings, 1979, vol. 76(7), pp. 775-808. [DOI:10.14359/6981]
4. [4] Mitchell, D., & Cook, W. D., "Preventing progressive collapse of slab structures", Journal of Structural Engineering, 1984, vol. 110(7), pp. 1513-1532. [DOI:10.1061/(ASCE)0733-9445(1984)110:7(1513)]
5. [5] Muttoni, A., "Punching shear strength of reinforced concrete slabs without transverse reinforcement", ACI structural Journal, 2008, 4(ARTICLE), pp. 440-450.
6. [6] Okamoto, H., & Maekawa, K., "Nonlinear analysis and constitutive models of reinforced concrete", Gihodo Shuppan Company, 1991, Tokyo, Japan.
7. [7] Oliver, J., Oller, S. and Oñate, E., "A plastic-damage model for concrete", International Journal of solids and structures, 1989, vol. 25(3). [DOI:10.1016/0020-7683(89)90050-4]
8. [8] Osteraas, J. D., "Murrah building bombing revisited: A qualitative assessment of blast damage and collapse patterns", Journal of performance of Constructed Facilities, 2006, vol. 20(4), pp. 330-335. [DOI:10.1061/(ASCE)0887-3828(2006)20:4(330)]
9. [9] Pachenari, A., & Bagherzadeh, S., "Analytical Study of Flat Slab Collapse Mechanisms due to Overloading in a Cluster of Exterior Panels", KSCE Journal of Civil Engineering, 2019, vol. 23(1), pp. 191-199. [DOI:10.1007/s12205-018-1033-3]
10. [10] Pearson, C., & Delatte, N., "Ronan point apartment tower collapse and its effect on building codes", Journal of Performance of Constructed Facilities, 2005, vol. 19(2), pp. 172-177. [DOI:10.1061/(ASCE)0887-3828(2005)19:2(172)]
11. [11] Pham, A. T., Lim, N. S., & Tan, K. H., "Investigations of tensile membrane action in beam-slab systems under progressive collapse subject to different loading configurations and boundary conditions", Engineering Structures, 2017, vol. 150, pp. 520-536. [DOI:10.1016/j.engstruct.2017.07.060]
12. [12] Prasad, S., & Hutchinson, T. C., "Evaluation of Older Reinforced Concrete Floor Slabs under Corner Support Failure", ACI Structural Journal, 2014, vol. 111(4). [DOI:10.14359/51686735]
13. [13] Qian, K., and Li, B., "Load-resisting mechanism to mitigate progressive collapse of flat slab structures", Magazine of Concrete Research, 2015, vol. 67(7), pp. 349-363. [DOI:10.1680/macr.14.00293]
14. [14] Russell, J., "Progressive collapse of reinforced concrete flat slab structures" (Doctoral dissertation, University of Nottingham), 2015.
15. [15] Russell, J. M., Owen, J. S., & Hajirasouliha, I., "Nonlinear behaviour of reinforced concrete flat slabs after a column loss event", Advances in Structural Engineering, 2018, vol. 21(14), pp. 2169-2183. [DOI:10.1177/1369433218768968]
16. [16] Sadek, F., Main, J. A., Lew, H. S., & Bao, Y., "Testing and analysis of steel and concrete beam-column assemblies under a column removal scenario", Journal of Structural Engineering, 2011, vol. 137(9), pp. 881-892. [DOI:10.1061/(ASCE)ST.1943-541X.0000422]
17. [17] Sagiroglu, S., "Analytical and experimental evaluation of progressive collapse resistance of reinforced concrete structures" (Doctoral dissertation, Northeastern University). 2012.
18. [18] Simulia (2016) User Manuel. Palo Alto, CA: ABAQUS Inc
19. [19] Trivedi, N., & Singh, R. K. "Prediction of impact induced failure modes in reinforced concrete slabs through nonlinear transient dynamic finite element simulation", Annals of Nuclear Energy, 2013, vol. 56, pp. 109-121. [DOI:10.1016/j.anucene.2013.01.020]
20. [20] US General Services Administration (GSA), Alternate Path Analysis & Design Guidelines for Progressive Collapse Resistance. Washington, DC: US GSA, 2013.

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