ACI 318-19 Changes to the Concrete Design Standard-Loads and Analysis

Video Transcription

Video Summary

The transcript outlines key considerations in structural load analysis and analysis procedures. Emphasis is placed on precautions around non-linearity and superimposing loads, especially when dealing with geometric or material non-linearity. It distinguishes between first-order linear analysis and second-order or non-linear analysis, highlighting how load factors should be applied differently in each scenario. The discussion includes updates from ASCE 7 on wind load factors and revisions in the ACI code, touching on load combinations and the stiffness assumptions. Torsional and flexural stiffness are also explored, explaining equilibrium and compatibility torsion in structural analysis. There is a focus on deflection prediction for beams, highlighting the shift from Branson’s to Bischoff’s equations to enhance the accuracy of predictions, especially in lightly reinforced members. Additionally, it mentions the introduction of adjustments for flexural stiffness calculations, specifically for reinforced concrete, while maintaining current pre-stress methods.

Keywords

structural load analysis

non-linearity

ASCE 7

flexural stiffness

deflection prediction