Formulation for free-standing staircase

Saeid Zahedi Vahid, Mohammad Ali Sadeghian, Siti Aminah Osman, Abdul Khalim Bin Abdul Rashid

Research output: Contribution to journalArticle

Abstract

In the analysis of a free-standing staircase with slab elements, approximate analytical methods are sometimes used because of the absence of specific code provisions due to their inherent limitations. These approaches, however, cannot predict the actual three-dimensional (3D) behavior of the stair slab system. In addition, analytical methods cannot predict the stress resultant distribution in any section. These drawbacks highlight the need for the development of more rational but simple analysis methods for design purposes. Thus, in this study, an extensive numerical study on the behavior of free-standing staircases was performed using the finite element package SAP2000. A sensitivity study on the different geometric parameters and material properties that affect the design force and moments was also conducted. As a result of this study, semi-empirical equations are proposed from which the design forces and moments can be calculated in a single step. The accuracy of the equations within an acceptable limit is established by comparison with the results of rigorous FE analyses. Finally, the proposed design equations lead to a simple, straightforward and safe design while simultaneously representing the true behavior of 3D free-standing stair slabs.

Original languageEnglish
Pages (from-to)1795-1801
Number of pages7
JournalKSCE Journal of Civil Engineering
Volume19
Issue number6
DOIs
Publication statusPublished - 17 Sep 2015

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Stairs
Stress concentration
Materials properties

Keywords

  • analysis
  • concrete
  • design
  • free-standing
  • stair

ASJC Scopus subject areas

  • Civil and Structural Engineering

Cite this

Formulation for free-standing staircase. / Vahid, Saeid Zahedi; Sadeghian, Mohammad Ali; Osman, Siti Aminah; Rashid, Abdul Khalim Bin Abdul.

In: KSCE Journal of Civil Engineering, Vol. 19, No. 6, 17.09.2015, p. 1795-1801.

Research output: Contribution to journalArticle

Vahid, SZ, Sadeghian, MA, Osman, SA & Rashid, AKBA 2015, 'Formulation for free-standing staircase', KSCE Journal of Civil Engineering, vol. 19, no. 6, pp. 1795-1801. https://doi.org/10.1007/s12205-015-0289-0
Vahid, Saeid Zahedi ; Sadeghian, Mohammad Ali ; Osman, Siti Aminah ; Rashid, Abdul Khalim Bin Abdul. / Formulation for free-standing staircase. In: KSCE Journal of Civil Engineering. 2015 ; Vol. 19, No. 6. pp. 1795-1801.
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