This event will be available for in-person or Zoom attendance.
Presentation:
The new building code requirement for structural concrete (ACI 318-19) has substantial changes regarding the design of Special Reinforced Concrete Shear Walls (SRCSW). The 2019 code requires that the design shear forces shall be increased by at most 300% depending on the number of stories and height of entire structural wall above the critical section. That means, the material quantities both reinforcement and concrete and also the thickness of the SRCWS will substantially increase in comparison to the SRCWS buildings designed before 2023. In other words, the cost and architectural program will be significantly impacted if the buildings are designed using code-based traditional (linear) design.
Another approach would be pursuing Performance-Based Engineering (PBE) to design lateral force-resisting system. PBE allows engineers to design the structural components based more on their deformation capacity than strength. Non-linear response history analysis (NLRHA) is one of the most preferred analysis procedures that is used under PBE. Using NLRHA requires more engineering judgment and application of the principals of materials and structural mechanics which in return allows engineers to eliminate conservatism that is inherent in the traditional code-based design. This does not necessarily mean that PBE will completely eliminate additional costs associated with the new requirements of ACI 318-19 but it will significantly help reduce the total cost.
This presentation will review the impacts of the code changes on SRCSW buildings and highlight the lessons learned from two case study projects that pursued PBE to bypass the more stringent code requirements to reduce project costs and impacts on the architectural programming. These projects used three different philosophies; ACI 318-14, ACI 318-19, and PBE to compare the differences in material quantities and design/layouts. The results for these studies, lessons learned, and PBE best practices will be presented.
Guest Speaker:
Ecem Ozsahin, PhD, SE
Project Structural Engineer, Holmes US
Dr. Ozsahin is a structural engineer with expertise in earthquake engineering. She received her doctorate in structural and earthquake engineering from the University of Nevada, Reno (UNR). During her research studies she received multiple awards and recognitions. She is currently a project engineer at Holmes US focusing on unique and complex projects specifically high rise residential and commercial projects. Her expertise is performance-based design engineering and seismic performance evaluation of existing buildings using nonlinear dynamic procedures.
ACI, Chapter, or SEAOCC Members - $45 per person
Non-Members - $55 per person
Full-Time Students - $20 per person
Member Virtual Attendance - $10 per person
Non-Member Virtual Attendance - $15 per person
Please make your reservation no later than noon, January 5th. Click here to reserve your place now!