AEI 2021 Professional Project Award Winners Presentations
Session Moderator: Daniel Grauerholz
Presentation #1: 100 Mount Street
Speaker - Benton Johnson, P.E., SE, LEED Green Associate; Skidmore, Owings & Merrill
Evocative of SOM’s design for the John Hancock Center in Chicago, 100 Mount Street is supported by an innovative cross-braced exoskeleton structure and anchored by an offset core and clad in a soaring glass curtain wall. A highly efficient structural system and an exposed megabracing were cleverly engineered so the torsional response of the building could be managed while minimizing the size, cost, and carbon footprint of the bracing system. The optimal geometry of the bracing was the result of years of in-house SOM research.
Structural innovations developed for 100 Mount Street improve both the stiffness compatibility issues of concrete cores and megabracing systems, as well as long-term self-stressing issues of composite-bracing systems. Findings from this project have led to several other SOM designed tall buildings that are currently utilizing similar techniques. These innovations are expected to influence the industry and lead to a new generation of composite concrete and steel megabraced tall buildings. The 35-story office tower is designed to be a significant landmark, 100 Mount Street is both structurally efficient and elegantly proportioned, giving the tower a unique identity in the North Sydney skyline.
- Understand the impacts of wind buffeting and escarpments on the loading and performance of tall buildings.
- Estimate the magnitude of self-stressing effects of creep and shrinkage of concrete elements.
- Identify three methods of structural optimization and their applicability to different types of structural systems.
Presentation #2: Billie Jean King Main Library
Speaker - Eric Long, P.E., SE, LEED® AP; Skidmore, Owings & Merrill
Positioned at the heart of downtown Long Beach, California, the Billie Jean King Main Library provides valuable municipal and community services. The library revitalizes a former dilapidated parking structure into a welcoming, sustainably-focused mass timber building. Early in the process, the design team determined it would be most economical to reuse and selectively upgrade a portion of the existing concrete parking garage upon which the new library is built. This key decision resulted in the diversion of 65% of the existing concrete that would have been demolished and considered waste.
Wood was selected not only for its architectural warmth and character, but also to minimize weight applied to the existing concrete garage. The building is one of the few in Southern California that utilizes a heavy timber structural system, which is composed of renewable heavy timber reinforced with steel and concrete where needed. Each material is strategically employed into a hybrid system to optimize its respective structural properties.
All MEP/ FS systems, building elements and assemblies were coordinated using a digital 3-dimensional building information model ahead of time as a strategy to reduce work performed in the field. Doing so translated into an opportunity to prefabricate most of the heavy timber members offsite. The project was assembled quickly and efficiently, leverage advantages such as optimal use of materials, less waste, higher control over quality, and higher overall value.
With its expansive wood-framed porch, the Billie Jean King Main Library is an inviting beacon for the City of Long Beach.
Identify the key decision drivers to select a heavy timber structural system and the organizational principles around the “kit-of-parts” approach for efficient construction.
Presentation #3: Modernizing design within an aging healthcare campus: Spotlight on Spectrum Lakeland Health, Lakeland Medical Center
Speakers - Jacob Clatanoff, P.E., SE, LEED Green Associate; Smith Group
Like many older hospitals, Lakeland Medical Center is composed of multiple buildings added over time, which resulted in a fragmented structure and confusing navigation. After the initial planning of a complex, but limited, operating room expansion and modernization, hospital leadership enlisted SmithGroup to completely re-envision the future of the facility.
Faced with aging infrastructure, including an oversized steam boiler plant, how did SmithGroup’s mechanical engineering team leverage the excess steam for the new pavilion? In addition, the existing electrical system on Lakeland’s campus was found to be unreliable for the facilities team due to utility outages and a lack of power monitoring systems. How did the team modernize these systems on the existing campus while also adding value to the client? In this presentation you will learn the following:
- Explore key performance indicators to provide value within a mechanical system.
- Build resilience into an aging electrical system.
Understand the design development and culmination from an integrated project team.