Brought to you with support fromDesigned with community and connectivity in mind, Populous has recently completed an amphitheater and flex field adjacent to the Jacksonville Jaguars’ professional football stadium. The project, named Daily’s Place, is the first amphitheater integrated with an NFL stadium in the country. With the grounds of the stadium active only a handful of times per year, the project is a response to a desire to activate the stadium area beyond football season with training events, concerts, festivals, and more. Two column-free large event spaces—composed of more than 80-percent fabric and steel—were delivered under a close collaboration between design and engineering teams. The entire facility is covered under one all-encompassing PTFE roof system manufactured by advanced polymer technology company Saint-Gobain. The composite membrane, called SHEERFILL, is made of fiberglass and polytetrafluoroethylene (PTFE) typically used as a permanent tensioned membrane structure in sports, transportation, retail, and specialty markets. Design, engineering and fabrication teams used the software in an unconventional way to blur the lines between design and detailing with construction and fabrication modeling. Populous consulted with Walter P. Moore, an international A/E firm, who provided envelope and facade engineering expertise. Erik Verboon, Principal at Walter P. Moore, said the project was very fast pacing, involving a "fluid" digital process. "This could have only been completed under a close collaboration with Populous and a digital workflow that we both harnessed." Design and construction models were shared back and forth between the design and engineering teams, involving an iterative series or Rhino and Grasshopper models. While Populous managed the formal strategy of the project, Walter P. Moore worked through model analysis and optimization that involved engineering and form-finding techniques. The facade involves a series of "V" shaped perimeter columns set inboard from the exterior envelope. The materiality of the skin began as polycarbonate panels, but evolved into an open mesh PTFE fabric to save steel tonnage that the smaller more rigid polycarbonate panels would have required. Above, an undulating roof of Daily’s Place passively cools the interior of the facility by controlling air movement. The resulting “roofscape” integrates LED lighting to highlight its wavelike form, introducing a customizable aesthetic element that can be adjusted dependent on programming. As a result of the scheduling of the project, ordering of the steel framework was on a critical path, however, the sizing and detailing of the steel was highly dependent upon the configuration of the PTFE fabric. Due to this, Verboon said the engineering of the system relied on "coupled models" which dynamically take both structural requirements of the PTFE fabric and steel framing into consideration, producing an optimized, efficient design. "The steel was based on loads of the fabric, and the fabric was based on the geometry of the steel. The two materials were intrinsically linked." (Courtesy Populous).One of the most challenging aspects of the detailing of the building envelope was the location of the roof membrane, which sits below long span trusses. The positioning of the membrane produced translucent ghosted effect, softening the visual impact of the structure, but resulted in detailing challenges with necessary penetrations from steel rail supports and the perimeter structure. At these columns, a unique "top hat" detail, involving a circular flange surrounding a steel drum, developed to ensure a watertight connection.
Posts tagged with "Walter P. Moore":
Thanks to the city's humid subtropical climate, facade designers and fabricators face a special set of challenges in Houston. Unchecked, steady sunshine and high temperatures can permeate the building envelope, leading to a heavy reliance on mechanical cooling systems. Meanwhile, Houston's Gulf Coast location makes it vulnerable to tropical storms. Sanjeev Tankha, principal and director of facade engineering at Walter P. Moore, argues that the solution to performance issues including solar gain and wind lies in a holistic approach to facade design. "All aspects of building envelope performance—from materials science to building physics analysis, structural analysis, research and development, waterproofing and weatherproofing, longevity and life cycle analysis—must be given a platform to engage effectively in the design process," he said. "Our industry must come to terms with and take on the challenge to respond effectively to the elements of solar heat and wind mitigation." Tankha will share his experience responding to the local climate next month at Facades+AM Houston. A half-day spinoff of the popular Facades+ conference series, Facades+AM brings regionally-specific discourse on high performance building envelopes to AEC industry professionals, students, and policymakers. In the real world of building design and construction, observed Tankha, environmental performance is regularly sidelined in favor of other concerns. "Performance of the building skin, in any given project, is often trumped by financial pressures to the detriment of overall building performance," he said. "I would like to see more commitment from AEC stakeholders to make performance issues a core value in our work." The key, he explained, is making performance a priority from the get-go. "The early design work needs to embed these values in the development so they are not add-on features," said Tankha. "This is a philosophical debate that is held on every project, and many times building performance comes out on the losing side." In Tankha's experience, less can be more when it comes to addressing solar gain and wind. "I always encourage the use of passive technologies and passive building systems first before the overlay of active systems," he said, pointing to historical strategies including building form and orientation. "I see some of that design philosophy coming back and now coupled with advancement in materials, coatings, and efficient mechanical systems, we have a palette for a holistic approach towards exploring effective solutions." To hear more from Tankha and other building envelope specialists, register today for Facades+AM Houston.
It appears our friends at engineering firm Buro Happold, which just moved their offices to Downtown Los Angeles, are experiencing some of their own moves. Chief engineers Greg Otto and Sanjeev Tankha have taken their talents to Walter P. Moore, a Santa Monica firm hoping to expand their design expertise and research capabilities. In other moving news, after ten years wHY Design’s founding partner Yo Hakamori has left the firm for DesignARC. And over in New York our friend Dung Ngo has announced he’s leaving Rizzoli. No word why at this point, but according to Ngo the parties are leaving “on the very best of terms.” If only all breakups were as amicable.