ACI 318-19 Updates – Two-Part Series
Wednesday, August 5th & Wednesday, August 12th from 12:00-2:00pm
Note: Registration is intended for both the individual and their company. Only the registering individual(s) will receive PDH credits. They are responsible for sharing the zoom link and any handouts to their company.
Please join us and our distinguished speakers to learn about updates that have been included in ACI 318-19 – Building Code Requirements for Structural Concrete. The seminar will include the following topics: code overview, shear updates, concrete anchorage, high strength rebar, and lateral system updates.
Part 1: August 5th
Code Overview and Shear Updates
Speaker: Dr. Jack Moehle – U.C. Berkeley
Dr. Moehle will provide an overview of the main changes in ACI 318-19 and will address in detail the changes to the provisions for shear design and design using the strut-and-tie method. As Chair of ACI 318, Moehle was responsible to set overall directions and manage the code development process for this code cycle. He will provide a broad overview of all the main changes to ACI 318-19 to make sure that code users are aware of changes that may affect their design practice. He will then delve into the detailed new code provisions for one-way and two-way shear, including equations recognizing size effect and reinforcement ratio effect, hanger reinforcement, bi-directional shear, and other new shear provisions He will conclude with a review of the new concepts introduced in strut-and-tie modeling.
Concrete Anchorage Updates
Speaker: John Silva – Hilti
Mr. Silva will address important changes to the anchorage provisions in ACI 318-19, including the addition of provisions for shear lugs and screw anchors. In addition, he will discuss the general topic of how the 318 code distinguishes development length from anchorage.
• Chapter 17 reorganization
• Inspection provisions
• Screw anchor provisions
• Anchorage and development length
Part 2: August 12th
High Strength Rebar Updates
Speaker: Rahul Sharma – Hohbach-Lewin, Inc.
Among the many changes in ACI 318-19, one sure to have a substantial impact is the allowance of higher-grade reinforcement in Seismic Applications. Up until the latest building code, the grade of reinforcement was limited to 60 ksi due to lack of research and testing on higher grades. However, recent research has broadened the understanding of the performance of high strength reinforcement and allowed less restriction in the building code. This talk will go through the research behind these changes and then delve into the changes in ACI 318-19 related to high strength reinforcement.
Lateral System Updates
Speaker: Dr. John Wallace – U.C. Los Angeles
A host of code changes were approved for adoption in Chapter 18 – Earthquake Resistant Structures of ACI 318-19. The most significant changes focus on improving the performance of special structural walls subjected to strong shaking, including: amplifying ASCE 7 wall shear demands, adjusting locations where longitudinal reinforcement may be terminated over the wall height, revising boundary element and web transverse reinforcement within the plastic hinge region to require overlapping hoops and web crossties, requiring a minimum area of boundary longitudinal reinforcement, placing restrictions on splices of boundary longitudinal reinforcement at the critical section, checking that the expected wall deformation capacity exceeds the expected wall drift demand, and introducing a definition of a new system, referred to as a Ductile Coupled Wall and proposing values for R, Cd, and Ω0 for adoption in ASCE 7. Other significant changes include allowing the use of high-strength reinforcement, with limitations, to resist flexural, axial, and shear demands in special seismic systems. Finally, requirements were relaxed for the roof-level column-to-beam strength ratio and for detailing of gravity columns. The presentation will provide a summary of these changes.
*Members of SEAOCC, SEOSC, SEAOSD contact firstname.lastname@example.org
| One Part Only (Part 1 or Part 2)
|Note: Registration is intended for both the individual and their company. Only the registering individual(s) will receive PDH credits. They are responsible for sharing the zoom link and any handouts to their company.
Jack P. Moehle, PE, F.ACI, F.SEI, F.
SEAOC is the Ed & Diane Wilson Presidential Chair in Structural Engineering in the Department of Civil and Environmental Engineering at the University of California, Berkeley. His research and
teaching activities are mainly in structural engineering, with emphasis on reinforced concrete and earthquake engineering. He is active professionally, both as a consulting engineer and as a
contributor to development of structural engineering standards and guidelines. He was the Chair of ACI Committee 318, Structural Concrete Building Code, for the code cycle leading to publication
of ACI 318-19. He has served on the Boards of Directors of the Structural Engineers Association of Northern California, the Earthquake Engineering Research Institute, and the American Concrete
Institute. He has received several professional awards, including the Krawinkler Award from SEAONC and the Distinguished Lecturer Award from EERI. He is author of the book Seismic Design of Reinforced
John Silva PE, SE, F.ACI, F.SEI is a senior director with Hilti North America engaged in standards development. He is a licensed civil and structural engineer in California (S3181), a Fellow of the Structural Engineering Institute and the American Concrete Institute, and a member of the SEAONC Board. He is the current President of the Concrete and Masonry Anchor Manufacturers Association (CAMA). Over the past three decades, Mr. Silva has served on numerous committees addressing seismic design and anchorage and has conducted earthquake reconnaissance following major earthquakes in California, Chile, New Zealand, Japan and Haiti. He chaired Task Committee 8 (Nonstructural Components) as part of the Seismic Subcommittee of ASCE 7 during the development of ASCE/SEI 7-10 and ASCE/SEI 7-16 and currently serves on the NEHRP Provisions Update Committee and on the Seismic Subcommittee of ASCE 7. He also chairs ACI 349-C (Nuclear Anchorage) and is a voting member on several code-related ACI committees. Mr. Silva is a co-author of the text Anchorage in Concrete Construction (2006 Ernst & Sohn, 378 pp.)
Rahul Sharma, PE, SE is a Project Engineer at Hohbach-Lewin, Inc. where he both designs new buildings and analyses and designs retrofits of existing buildings. Rahul is an active member of the SEAONC Seismology committee and the current chair of the Concrete Subcommittee. He has previously worked on editing the SEAOC Seismic Design Manuals for the 2015 IBC, editing several articles for the 2019 SEAOC blue book and was part of an ad-hoc committee which investigated torsion in buildings. He also frequently attends ASCE 7-22 Seismic Subcommittee Meetings.
John Wallace, Ph.D., C.E, F. ACI, F. ASCE, professor of civil engineering at the University of California, Los Angeles (UCLA), is an internationally recognized expert on the seismic behavior of reinforced concrete structures. His research contributions focus on assessing the behavior of structures subjected to earthquake loading, laboratory and field testing of structural components and systems, developing and validating models for structural analysis and design, and applying sensors and sensor networks to measure structural responses and interactions. Professor Wallace is active as a consultant and peer reviewer on high-profile performance-based design projects for seismic retrofit of existing buildings and seismic design of tall buildings. He has actively participated in updates to ASCE 41 and ACI 318, as well as the PEER TBI and LATBSDC Guidelines. Dr. Wallace received a BS in Civil Engineering from the University of Vermont and MS and PhD in Civil Engineering from the University of California, Berkeley.