STRUCTURAL ENGINEERS ASSOCIATION OF ARIZONA
Central Chapter Dinner Meeting:
Many existing structures, such as self-supporting telecommunication towers, are built with constant-width caisson foundations. Due to the increased demand to add more loading on these structures, and more stringent strength requirements in recently-revised design standards, many existing caisson foundations require significant strengthening for additional uplift resistance. Although a number of retrofit design solutions are frequently used in practice, there is a lack of literature providing guidelines for the proper analysis of the retrofitted foundations. A detailed analysis and design methodology is recently proposed to significantly increase the uplift capacities of existing caissons through the use of helical/micro piles and concrete cap beams. This presentation will introduce the proposed methodology, and present the strut-and-tie and finite element models developed to verify the system-level behavior. The overall design methodology will be presented in a case study involving an existing tower. The proposed design has a general applicability and is suitable for applications where there is limited space around the existing foundations.
Serhan Guner is an Assistant Professor in the Department of Civil and Environmental Engineering at the University of Toledo, Ohio. He received his PhD from the University of Toronto, Canada. Prior to joining Toledo, he worked as a consulting structural engineer for five years in Toronto. During this time, he was awarded the Carson Innovation Award for his retrofit design of a large foundation system. He is a voting member of Joint ACI-ASCE Committee 447 (Finite Element Analysis of Reinforced Concrete Structures). His research interests include numerical modeling of retrofitted concrete structures, failure behaviour of concrete, pile caps and helical piles, and analysis of deep elements, disturbed regions and anchorage zones. More information about his research can be found in his university website at http://www.utoledo.edu/engineering/faculty/serhan-guner/
Mexican Buffet Lunch: Spinach con Queso, Fajita Bar – Steak, Chicken, and Fresh vegetables (Comes with Rice, Beans, Fresh Chips & Salsa).
Please join us!