Structures Congress 2019
The River Building Spanning over the FDR
Publication: Structures Congress 2019: Buildings and Natural Disasters
ABSTRACT
The Hospital for Special Surgery (HSS) new River Building consists of eleven stories plus a mechanical penthouse covering a footprint area of approximately 804 m2 (8650 ft2) which will be connected to the existing HSS buildings. The River Building will span over the FDR Drive, one of the busiest roadways in Manhattan. The building frame consists of entirely structural steel with a total weight of approximately 2500 tons. This paper discusses the major challenges faced in designing and planning the construction of the new HSS building. Not only must the building span 31 m (100 ft) across the FDR, but it is also required to maintain 6.10 m (20 ft) clear height for underneath vehicles. This results in using a mix of transfer girders and multi-story high trusses along the north-south faces of the building in addition to moment frames to enable the structure to span over the FDR. Due to the sloping rock profile underneath the building and the limited footprint available for the foundations, a combination of reinforced concrete caissons with rock anchors are used on the east side. On the west side, spread footings bearing on shallow bedrock are used. Computational fluid dynamics (CFD) analysis is performed to demonstrate that the building can withstand an extreme event such as car fire right adjacent to the building. The CFD analysis results provided transient temperature variations for the exposed steel members. These data were then used to calculate the reduction in steel strength and stiffness. The reduction in steel material properties due to fire was considered in the analysis and design of the building for both strength and serviceability. The structural framing system is designed for off-site modular construction due to the limited work area available, crane pick limitations, and to minimize disruption to the FDR. The modular construction plan involves utilizing the East River to transport pre-fabricated modules via a barge then lifting them into place above the FDR.
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ACKNOWLEDGEMENTS
The authors would like to thank Dr. Maged Yousef, Professor at Western University in Civil and Environmental Engineering department, for his review and constructive comments that greatly improved the manuscript. All figures provided in the main text that are not referenced have been provided courtesy of AECOM.
REFERENCES
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Cheong, M. K., Spearpoint, M., & Fleischmann, C. M. (2008). Using the peak heat release rate to determine the fire risk level of road tunnels. Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability, 222(4), 595–604. https://doi.org/10.1243/1748006XJRR169
Mohd Tohir, Mohd Zahirasri & Spearpoint, Michael. (2014). Development of Fire Scenarios for Car Parking Buildings using Risk Analysis. Fire Safety Science. 11. 944-957. 10.3801/IAFSS.FSS.11-944.
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Published In
Structures Congress 2019: Buildings and Natural Disasters
Pages: 84 - 98
Editor: James Gregory Soules, McDermott International
ISBN (Online): 978-0-7844-8222-3
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Apr 22, 2019
Published in print: Apr 22, 2019
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