Pca Notes On Aci 31819 ((full))

Side-by-side looks at what changed from 318-14 to 318-19.

The PCA Notes explain the new, more complex "size effect" factor for one-way shear in nonprestressed members without minimum shear reinforcement.

ACI 318-19 introduces stricter design requirements for structures located in seismic zones, focusing on ductility and capacity design. pca notes on aci 31819

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For detailed design examples and in-depth discussions on these topics, engineers are encouraged to reference the official PCA publications. Side-by-side looks at what changed from 318-14 to 318-19

| | ACI 318-14 | ACI 318-19 (per PCA Notes) | | --- | --- | --- | | High-Strength Reinforcement | Limited to Grade 80 (80 ksi) | Grade 100 (100 ksi) allowed with modifications | | Shear Strength (Chapter 22) | Simplified method based on √f’c | New size-effect factor for beams without stirrups | | Two-Way Shear (punching) | Vc based on √f’c * b0 * d | Vc now includes a size effect factor (λ_s) that reduces strength for thicker slabs | | Dowel Bars for Wall-to-Slab | Required to ensure composite action | Clarified detailing for non-composite walls | | Development Length (Chapter 25) | Simplified equation (ld = 0.17ψt ψe db fy / √f’c) | Modified to account for epoxy-coated bars more precisely | | Anchorage (Chapter 17) | Based on Appendix D (2011) | Full integration – new provisions for adhesive anchors under sustained tension |

The 318-19 code enhanced the anchorage provisions, particularly regarding post-installed anchors. 🔍 For detailed design examples and in-depth discussions

One of the most substantial shifts in ACI 318-19 is the expanded material palette.

If you are using the (DDM) for flat plates/slabs: