Membrane Action in Orthotropically R.C. Rectangular Slabs Supported on Three Edges Only with Variable Axial Restraints | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 29, Issue 6, April 2011, Pages 1131-1144 PDF (367.17 K) | ||
| DOI: 10.30684/ etj.29.6.8 | ||
| Authors | ||
| Hisham M. Al-Hassani; Sura Abdul Muneim Salman | ||
| Abstract | ||
| In this paper, large deformation analysis is carried out on uniformly loaded orthotropically reinforced concrete rectangular slabs that have one free edge and different restraints on the other edges. For the purpose of such analysis, the slabs are assumed to behave in a rigid-perfectly plastic manner and to yield under the combined effect of bending and membrane action. Two cases are analysed; the case of a slab having two adjacent edges fixed- one edge simply supported and one edge free, and the case of a slab having two adjacent edges simply supported- one edge fixed and one edge free. Results of the analysis indicate considerable enhancements in the load carrying capacity of such slabs above those predicted by Johanson's simple yield line theory(1).The amount of the load enhancement in a particular slab is found to depend on many parameters such as the steel ratio rx + , orthotropy ratio g, compressive strength of concrete fʹc , yield stress of steel fy , and the slab aspect ratio Ly/Lx, such that a higher enhancement in load is achieved for a slab having a higher value of fʹc but lower values of Ly/Lx , rx + , g and fy . | ||
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