Two-Way Slab Systems: Recent Developments and Showcases on Design, Analysis, Construction, and Evaluation Methods-ACI 421.3R15 Guide to Design of Reinforced Two-Way Slab Systems (Recorded presentation)

ACI 421.3R15 Guide to Design of Reinforced Two-Way Slab Systems (Recorded presentation)

Video Transcription

Video Summary

In October 2015, a new design guide, ACI 421.3R, was introduced by the committee after five years of preparation, primarily led by James Sly. This was the first edition focusing on reinforced concrete slabs. It covers various aspects like slab systems, analysis methods, design procedures, reinforcement detailing, and serviceability considerations. The guide discusses two main prescriptive methods: the direct design method for regular column layouts, and the equivalent frame method, both currently featured in ACI 318 but may be moved to this guide in the future. Topics such as finite element analysis and yield line analysis are introduced, with discussions on assumptions, non-linear behavior of materials, boundary conditions, analysis methods, and model verification. Additionally, it covers design procedures for flexural and shear elements, post-tension slabs, reinforcement detailing, serviceability concerns like deflections and crack control, and design considerations for slab-column frames in seismic conditions. The document is a future reference for practicing engineers designed to replace current ACI provisions.

Keywords

reinforced concrete slabs

design procedures

finite element analysis

reinforcement detailing

seismic conditions