Optimization of design formulations for reinforced concrete slabs

Abstract

The predictions for flexural requirement in singly reinforced concrete slabs and sections have been assessed using the minimum weight approach and mathematical programming. Results indicate that although the predictions in the codes are safe; they are quite conservative, expensive and encourage although the predictions in the codes abuse. The value of under-estimation ranges from 17% to 27% in the codes. A more precise stress block may be necessary in order to reduce if not eliminate under-estimation. It is suggested therefore, that fully probabilistic design formulations be employed for the determination of flexural requirements of reinforced concrete slabs or sections in order to eliminate or at least minimize abuse(s) that can subsequently result into the reduction of the structural integrity or outright failure of such members

Keywords: reinforced concrete slabs, flexure, mathematical programming, design formulations codes