Sustainable Shells Now and in the Future

Tuesday, November 5, 2024  4:00 PM - 6:00 PM, Grand BR Salon A

We are currently working with members of 565 Lunar concrete, American Shotcrete Association, and members of International Association for Shell and Spatial Structures (IASS) to be some of our speakers. This session will help people understand how shells are currently being designed and used. They will also get an introduction to the recently released PRC-334.1 document. This session will be for anyone who wants to learn about the exciting new ways shells are being designed and used to produce sustainable structures.

Shells, It's Hip to not be Square

Presented By: Chris Zweifel
Affiliation: ZZ Consulting
Description: Art and engineering need not be at odds. The recently updated ACI 334.1-22 Concrete shell structures - Guide, opens up new avenues to design exciting and beautiful shell structures. The guide breaks down design options ranging from the straight lines of folded plates to the varying curves of free form and form found shells, and everything in between. After exploring the different shell configurations, we will delve into an overview of the design, analysis and construction of shells. From sheds to opera houses and churches to train stations and public spaces, shell structures are an opportunity to meld art and engineering.

Sustainability of Thin-Shell Domes

Presented By: Charles Hanskat
Affiliation: American Shotcrete Association
Description: Concrete domes have been used for centuries to provide free-span cover over large circular footprints. Thin-shell reinforced concrete domes have been used since the early 1900s. The basic design is straight-forward and has been refined by modern analysis techniques, forming techniques and concrete placement. We will focus a bit on the history of concrete domes and explore the various options for current dome construction. Then we will detail how concrete domes allow maximum spans with minimum concrete, and have distinct sustainability benefits.

FEA Analysis of Thin-Shell Geometries

Presented By: Jason South
Affiliation: Dome Technology
Description: Comparison of Closed Form Analysis to Finite Element Analysis of various thin-shell geometries, including, domes and hyperbolic-parabolas. The performance of these shapes will be contrasted to grid shell structures. Performance of free-form structures will also be addressed.