PCI Design Handbook Richard Miller, PhD, PE, FPCI Professor of Civil Engineering University of Cincinnati Chair, PCI Research and Development Council 1 What is the Design Handbook? It’s PCI’s “how to” manual for prestressed concrete design. Now on 7th Edition! (8th due in 2016 – updated to ACI-318-14) 2 Design Handbook Chapters • • • • • Chapter 1 – Applications Chapter 2 - Notation Chapter 3 – Preliminary Design Chapter 4 – Analysis and Design Chapter 5 – Design of Precast/Prestressed Components • Chapter 6 – Design of Connections • Chapter 7 – Structural Considerations for Architectural Precast • Chapter 8 – Handling and Erection Bracing 3 Design Handbook Chapters • • • • • • • • Chapter 9 – Materials Chapter 10 – Design for Fire Resistance Chapter 11 – Thermal and Acoustical Properties. Chapter 12 – Vibration Design of Precast/Prestressed Concrete Floor Systems Chapter 13 – Tolerances Chapter 14 – Specifications and Standard Practices Chapter 15 – General Design Information Appendix – ACI 318-08 4 PCI Design Handbook • Many instructors use the Design Handbook as the text for class. • Contains information not found in standard texts. • Available at huge discount from PCI. – Used to be free, but the economy …. – Professors can get a hard copy as part of “Prestressed in a Box” – Students get CD copies for $25 if they are PCI Members (membership is FREE). 5 PCI Design Handbook So the Design Handbook is just for precast/prestressed class, right???? 6 PCI Design Handbook The Handbook IS useful in Prestressed Class because: • It has information on precast materials • It covers design of both components and systems • It has worked design examples • It has needed tables/graphs • It has product information 7 PCI Design Handbook The Handbook IS useful in Prestressed Class because: • It has information on advanced subjects – Torsion – Connections – Anchor bolts • Provides PCI Standard Practices – Deviations from ACI 318 that have been proved to work. 8 PCI Design Handbook The Handbook is also useful in: • Reinforced Concrete Design (a lot of precast is reinforced but not prestressed) • Construction Materials • Foundation Design • Structural Analysis/Structural Systems 9 PCI Design Handbook • Chapter 1 – Precast and Prestressed Concrete: Applications • Shows applications of precast – An image library is available from PCI with more images 10 PCI Design Handbook • Chapter 2 is Notation • Chapter 3 – Preliminary Design – Briefly discusses loads – Has preliminary design tables – Discusses preliminary design. 11 PCI Design Handbook • Chapter 4 – Analysis and Design of Precast/Prestressed Concrete Structures – Discusses basic loads and ASCE 7 Load Combinations • Useful for any structural course • Discusses loads not commonly covered in classes (snow, wind, earthquake) – Structural integrity – Volume Changes 12 PCI Design Handbook • Chapter 4 – Analysis and Design of Precast/Prestressed Concrete Structures also has: – Lateral Load resisting systems • Moment Frames • Shear Walls • Diaphragms – Blast Resistance Note – The SE exam is now two days long. The second day is entirely lateral load resisting systems! The information in Chapter 4 is very helpful for the second day of the exam! 13 PCI Design Handbook At UC, we have now have a required class on Structural Loads and Systems that covers lateral load design. We use Chapter 4 information about loads, lateral load resisting systems and diaphragms. (We hope to add a lateral load module to Prestressed in a Box. Waiting for budget approval.) 14 Here is a sample page. It has Snow Load Charts. This is very useful for a class on loads. 15 Here is a typical page discussing structural integrity. The requirements are shown. How the building is designed to meet these requirements is also shown. 16 PCI Design Handbook • Chapter 5 – Design of Precast and Prestressed Concrete Components – VERY IMPORTANT: Both reinforced and prestressed members are covered! – Design Handbook could be used for regular reinforced concrete design courses! – Contains WORKED design examples! 17 PCI Design Handbook Worked example for a hollow core slab. 18 PCI DESIGN HANDBOOK The 7th Edition is based on ACI-318-05. Appendix A discusses changes in ACI-318-08. ACI-318-14 was mostly a reorganization. Thus, the basic code equations and designs are mostly still valid. To use the material, it will usually just be necessary to provide new section in ACI-318-14. 19 PCI Design Handbook Chapter 5 contents: • Basic theory (stress block, phi factors, etc.) • Flow chart for flexural design (pretensioned, post-tensioned, partially prestressed and nonprestressed) • Strain Compatibility • Flexural design examples 20 PCI Design Handbook Chapter 5 contents: • • • • Service load design (with examples) Composite members Release stresses (with examples) Cracked and transformed sections (with examples) • Bond/Development Length – Evaluation of members with underdeveloped strand. 21 PCI Design Handbook Chapter 5 contents: • • • • • • Loss of Prestressing Force Shear Design (with examples) Horizontal Shear (with examples) Torsion (with examples) L Spandrels Bearing 22 PCI Design Handbook Chapter 5 contents: • Camber and deflection (with examples) – Class T sections – Long Term • Thermal Stresses (with examples) • Columns (with examples) • Wall Panels (with examples) 23 PCI Design Handbook Chapter 5 contains information NOT in ACI 318! • ACI 318 (CH 11) allows the use of the PCI Design Manual Torsion Design Method, but gives no details. Design Handbook has examples. • ACI 318 (CH 18) requires calculation of losses, but gives no information except friction loss. Design Handbook has loss calculations 24 PCI Design Handbook The Design Handbook refers to PCI Standard Practices. These are items NOT in ACI 318, but have they have been proven to work. 25 PCI Design Handbook • Chapter 6 – Connections • Can be used in more advanced courses. • Has information on embedded plates, anchored plates and welded studs. • 7th Ed includes results of extensive study of studs by WJE! 26 PCI Design Handbook • Chapter 7 – Architectural Precast • Discusses load bearing and nonloadbearing panels. • Discusses thermal stresses/volume changes. • Crack control. • Wind Pressures (ASCE 7). 27 PCI Design Handbook • Chapter 8 – Product Handling and Bracing – Excellent for Construction Courses! 28 PCI Design Handbook • Chapter 9 NEW – Materials – Could be used in a Construction Materials course. – Concrete • Constituent Materials • Physical Properties • Finishes • Grouts 29 PCI Design Handbook • Chapter 9 NEW – Materials – Connection Materials – Reinforcement • Prestressed • Non Prestressed 30 PCI Design Handbook • Chapter 10 – Design for Fire Resistance • Chapter 11 – Thermal and Acoustical Properties • Chapter 12 – Vibration Design of Precast/Prestressed Concrete Floor Systems • Chapter 13 – Tolerances 31 PCI Design Handbook • Chapter 14 Specifications and Standard Design Practices. • Side-by-side comparison of ACI 318-05 and PCI Standard Design Practices. • Suggested Specifications for Architectural Precast 32 PCI Design Handbook • Chapter 15 – Design Aids – Dead Load and Live Load tables – Beam tables – Camber equations – Material properties – Standard nuts, bolts and washers – Welding information – Section properties 33 A Great Feature Highlighted references are contained on the CD. Just click and the reference is there!!!! 34 TEACHING WITH THE DESIGN HANDBOOK • Prestressed-in-a-box design examples (12RB24 beams) are based on 7th Edition of the Design Handbook. • The Handbook can function as a textbook. – Basic Information – Numerous worked example problems where appropriate. 35 PCI Design Handbook The PCI Design Handbook is a great alternative to a standard text book for prestressed concrete courses! It is also useful across a wide range of other CE courses! 36