INFLUENCE OF STEEL REINFORCEMENT ON THE BEHAVIOUR OF RCC SHELLS

摘要

Unlike floor slabs of building, RCC shells require much less steel reinforcement to take care of tensile stresses developed. From the view point of ultimate behaviour of shell structures analysis considering presence of steel reinforcements is thought to be of importance. Paper deals with linear elastic behaviour and elasto-plastic behaviour of RCC shells subjected to uniform vertical surcharge over the top surface and the longitudinal thrust in the span direction. Besides varying the lengths of shells for a fixed section of shells three degree of reinforcements are considered. Finite element analysis is performed employing 4 noded plate elements for conduction a parametric investigation in the form of various spans. Results of analysis reveal that so far as elastic behaviour is concerned the difference between concrete and RCC shell is negligibly small. However, elasto-plastic behaviour reveals that in general RCC shell has higher capacity compared with that of concrete shell.