Optimized Design Charts for Fully Restrained Slabs by FE Predictions

Abstract

Previous test results of two-way fully restrained reinforced concrete slabs are used to optimize the model parameter values involved in a finite element program. The parameters whose sensitivities control the simulation process are identified through extensive parametric studies using both the displacement and load control strategies, and values are identified for them. Use of such values has been shown to guarantee reliable predictions of both the peak load and the corresponding deflection of arbitrary fully restrained rectangular slabs. A series of numerical predictions of over 850 “computer model” slabs are undertaken, varying the geometric and material properties, as well as the reinforcement ratios. The result is used for developing charts that may be used for the strength and displacement determination of arbitrary fully restrained slabs. The charts are used for the predictions of 36 previously tested slabs, in which the slab strength is predicted to within a mean accuracy of 2%, and the deflection is predicted to within a mean accuracy of 4%. Other practical applications of reliable numerical predictions are discussed.