A path to more versatile code provisions for slab deflection control

Abstract

An assessment of the methods of codes ACI-318 and Eurocode 2 is performed to establish a minimum slenderness for reinforced concrete slabs, which is a simplified method for controlling the deflection of slabs. This assessment is performed by comparing these methods between themselves and with two other methods that have inspired, among others, the Australian Standard for Concrete Structures. The evaluated variables include those that most influence deflection control (span, load, and allowable deflection). The study cases include spans that range from 6 m (20 ft.) to 12 m (40 ft.) and loads that range from 5 kN/m2 (104 lb/ft2) to 15 kN/m2(313 lb/ft2). The results of the study reveal some of the key advantages and shortcomings of the ACI-318 and Eurocode 2 provisions. Suggestions are given to improve the current provisions of the codes. Methods that are not too complicated but more refined can help code provisions become more versatile. This work aims to minimize potential problems caused by designing excessively thick slabs (heavy and pollutant) or excessively slender slabs (too deformable).