University of Technology-Iraq
Engineering and Technology Journal
1681-6900
29
6
2011
04
01
Membrane Action in Orthotropically R.C. Rectangular Slabs Supported on Three Edges Only with Variable Axial Restraints
1131
1144
30931
10.30684/ etj.29.6.8
EN
Hisham
M. Al-Hassani
Sura
Abdul Muneim Salman
Journal Article
2011
04
01
In this paper, large deformation analysis is carried out on uniformly loaded<br /> orthotropically reinforced concrete rectangular slabs that have one free edge and<br /> different restraints on the other edges. For the purpose of such analysis, the slabs<br /> are assumed to behave in a rigid-perfectly plastic manner and to yield under the<br /> combined effect of bending and membrane action. Two cases are analysed; the<br /> case of a slab having two adjacent edges fixed- one edge simply supported and one<br /> edge free, and the case of a slab having two adjacent edges simply supported- one<br /> edge fixed and one edge free.<br /> Results of the analysis indicate considerable enhancements in the load carrying<br /> capacity of such slabs above those predicted by Johanson's simple yield line<br /> theory(1).The amount of the load enhancement in a particular slab is found to<br /> depend on many parameters such as the steel ratio rx<br /> +<br /> , orthotropy ratio g,<br /> compressive strength of concrete fʹc , yield stress of steel fy , and the slab aspect<br /> ratio Ly/Lx, such that a higher enhancement in load is achieved for a slab having a<br /> higher value of fʹc but lower values of Ly/Lx , rx<br /> + , g and fy .
https://etj.uotechnology.edu.iq/article_30931_92d90dbc3579cec0df620f4b90e0edb1.pdf