Lower Bound Limit Analysis of Rectangular Slabs

by Kanakapura S. Subba Rao, (A.M.ASCE), Asst. Prof.; Civ. Engrg. Dept., Indian Inst. of Sci., Bangalore, India,
Balagolam V. Ranganatham, Prof.; Civ. Engrg. Dept., Indian Inst. of Sci., Bangalore, India,
N. Rangaiah, Research Scholar; Civ. Engrg. Dept., Indian Inst. of Sci., Bangalore, India; on deputation from Jawahar Lal Nehru Technological Univ., Andhra Pradesh, India,


Serial Information: Journal of the Structural Division, 1977, Vol. 103, Issue 11, Pg. 2193-2209


Document Type: Journal Paper

Discussion: Braestrup Mikael W. (See full record)
Closure: (See full record)

Abstract: A general method for the development of valid lower bound solutions to uniformly distributed and orthotropically reinforced rectangular concrete slabs obeying normal moment criterion is described. General expressions for moment field have been obtained for nine cases of slabs having all combinations of simply supported and clamped-edge conditions. The lower bound collapse loads have been compared with the upper bound values obtained by the yield line theory. The paper also focuses attention to the need for the development of valid upper bound solutions with the satisfaction of kinematical admissibility and the flow rules associated with the normal moment criterion.

Subject Headings: Reinforced concrete | Failure loads | Orthotropic materials | Concrete slabs | Moment distribution | Case studies | Kinematics

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