American Society of Civil Engineers


CityCenter’s Long Span Porte Cochères


by Dennis Poon, (MSCE, PE, Managing Principal, Thornton Tomasetti, Inc., 51 Madison Avenue, 17th Floor, New York, NY 10010. E-mail: dpoon@thorntontomasetti.com), I. Paul Lew, (MSCE, MArch, PE, RA, Senior Vice President, Thornton Tomasetti, Inc., 51 Madison Avenue, 17th Floor, New York, NY 10010. E-mail: plew@thorntontomasetti.com), and John Barry, (MSCE, PE, Project Engineer, Thornton Tomasetti, Inc., 51 Madison Avenue, 17th Floor, New York, NY 10010. E-mail: jbarry@thorntontomasetti.com)
Section: Posters, pp. 2659-2670, (doi:  http://dx.doi.org/10.1061/41171(401)232)

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Document type: Conference Proceeding Paper
Part of: Structures Congress 2011
Abstract: Welcoming guests to Aria, CityCenter’s 4,004 room hotel and casino, are two feature porte cochères: the Harmon Canopy to the north at the Aria Hotel lobby, and the Casino Circle Canopy to the east at the City Center Casino entrance. The canopies, with heights of 102’ and lengths of 157’, are large, three dimensional structures that use their geometry to resist loads and integrate into the surrounding program. The primary system to create the canopies’ cantilevers are a series of cable stayed box girders on a radial grid attached to box columns. A single cable between the box beam and column is tensioned against pairs of compression struts to resist uplift forces in the canopy. Perpendicular to the frame of the box beam and column is a lattice work of stayed girts that support the inverted glass roof hung below. A series of in plane rods, bracing and radial struts create a diaphragm between the box girders to resist both seismic and wind lateral loading. In addition, the diaphragm stiffens the frames to reduce both periods and deflections. The extreme fast-track nature of the CityCenter construction schedule led to unique problems and solutions in executing the design and construction of the two canopies.


ASCE Subject Headings:
Commercial buildings
Structural analysis