Basics of Strut and Tie Modeling
Presented by: Royce Floyd, Ph.D., P.E., Associate Professor
This presentation will provide a brief history and general overview of strut and tie modeling based on the ACI 318 Building Code Requirements for Structural Concrete and Commentary. It will include discussion of situations where a strut and tie model is appropriate, strut and tie model development, and calculation of strut and tie model strength. The presentation will also include limited discussion of detailing required to satisfy ACI 318. A deep beam will be examined as an application of strut and tie modeling for design.
Architectural Exposed Concrete
Presented by: Rob Kinchler, P.E.
Architectural concrete offers the designer a broad range of aesthetic options while simultaneously reducing environmental impacts by elevating the visible presence of a commonly employed structural material through texture, color and refinement of the surface. This presentation will explore the options to enhance reinforced concrete surfaces as a durable finish surface. Relevant ACI standards and field practices for specifying tolerances and achieving the desired aesthetic outcome, as well as examples of exposed reinforced concrete projects will be discussed.
Gusset Plates: The Evolution of Simplified Design Models
Presented by: Bo Dowswell, P.E., Ph.D.
Gusset plate connections can be complex structural systems that are separated into several elements for design purposes. This presentation will provide a brief history of gusset plate design methods and discuss their evolution over the last century. Current design provisions will be discussed, where column and beam models are used to predict the strength of gusset plates in various configurations, including wrap-around gusset plates.
Large Scale 3D Printing: Concrete Construction Applications
Presented by: Edel Arrieta, Ph.D.
A discussion about the readiness of Large Area Material Extrusion Additive Manufacturing finding applications in concrete construction. Nowadays, large scale 3D printing is overcoming size restrictions, allowing for the fabrication of formwork made of fiber-reinforced polymers; this technology has shown to deliver more durability and freedom of design compared to wooden and metal, in addition to being less labor-intensive given its automated process. In this session, an overview of 3D-printed materials properties will be followed by a study case of the successful use of 3D-printed formwork. Lastly, a Big Area Additive Manufacturing (BAAM) machine will be showcased together with some demonstration parts.
Best Practices for Expert Witness Testimony
Presented by: Cara Kennemer
Kennemer’s practice focuses on all aspects of commercial and residential construction law. Cara assists owners, contractors, design professionals, subcontractors, and suppliers in the negotiation and preparation of design and construction contracts and advises clients on risk allocation and project management. She litigates and arbitrates disputes involving design and construction errors, delay claims, building performance problems, lien and bond claims, collection of construction funds, and termination issues. Cara also helps clients protect their lien and bond claims through the process of pre-claim notices, filing of mechanic’s and materialman’s liens and surety bond claims, negotiating payment with contractors and property owners, and filing suit to litigate lien and bond claims.
Castings in Architecturally Exposed Structural Steel
Presented by: Suzy Rajamoney, PE., Technical Sales Specialist, Cast Connex
The use of structural steel castings in building and bridge structures is a fast-growing trend in the United States, as casting manufacturing offers unparalleled geometric freedom in structural steel. Cast steel components are often used to address challenges in design and construction that would be difficult to tackle using conventional steel fabrication. Given the freeform capabilities of casting manufacturing, castings are also commonly used in architecturally exposed structural steel. This presentation will provide examples of how castings have been successfully integrated into a wide range of projects throughout the world and will teach attendees how to leverage castings in their designs to enhance the structural and architectural performance of key structural connections.
Bridge Repair Practice and Considerations
Presented by: Brian D. Merrill, P.E.
A look at bridge repair practices in Texas and other states, including a discussion of the challenges involved in bridge repair design.
Wind and Storm Design for Mission Critical Projects
Presented by: Brad Cheshire, P.E.
A discussion of strategies and design guidance when designing mission-critical facilities for higher than code minimum wind loading.
Understanding Concrete Structures: Concrete Never Lies
Presented by: Dr. Ramón Carrasquillo
The Structural Engineer of Record is responsible for understanding, considering, and addressing in the specifications all of the relevant factors and their fundamental relationship affecting the performance of the designed system. Today, developments in new technologies and their availability for implementation in the current construction practice far exceed the timeliness at which existing codes and regulations can address them. Through a series of case studies, Dr. Carrasquillo discusses the need for understanding all of the relevant factors affecting the success of a designed system.
Reimagining the Engineering Industry Post COVID-19 Panel Discussion
Paul J. Rielly, P.E., S.E., Halff Associates, Inc.
Peter Larson, P.E., Wiss, Janney, Elstner Associates, Inc.
John Schwab, P.E., Spannbeton, Inc
Due to the shutdown, the engineering industry has experienced supply chain disruption, a shortage of subcontractors and materials, and the termination of contracts. In the SEAoT 2020 Virtual Conference Panel Discussion, Paul, Peter, and John discuss how the day-to-day operations have changed during the pandemic, as well as the many opportunities that have come out of these challenges.
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