The W Dallas Victory Hotel & Residences is a cornerstone of the Victory Development. This 72-acre urban lifestyle area offers retail outlets, distinctive dining, Class-A office space, mid-rise/high rise residences and entertainment venues. Rising from a single base with ground-floor retail are the North Tower and the South Tower. In total, the structures feature 251 hotel rooms, 144 condominiums, a two-story living room lobby and a signature restaurant - an outpost of the renowned Las Vegas Ghostbar nightclub. Additionally, one city block of the structure is dedicated to a seven-level parking garage for the W Victory.
The W Victory Hotel & Residences was originally designed as a post-tensioned, 33-story tall single tower. The design featured unique curved architectural elements housing 251 hotel rooms and 61 residential units. Due to the rapid sales of the tower's residential units, a 10-story South Tower was added to the development on a rapid schedule. To meet the demand for the new residential space in this prime location, the owner once again turned to post-tensioning to accommodate the demanding production schedule, as well as the unique architectural design of the complex. The South. Tower encompasses 83 one-, two- and three-bedroom residences, including some two-story units, plus a dedicated lap pool and fitness center. The complete project has been called a true success and post-tensioning (PT) was a key component in the creation of this dramatic complex.
The success of the W Victory project is also attributed to the design-build and collaborative efforts of the contractor, engineer and supplier. Their efforts made it possible for the South Tower to be added to the design mid-way through construction. The building design and construction sequence made the application of the multi-strand post-tensioning systems very complex and the PT supplier worked hand-in-hand with the project engineer to ensure the bonded PT system met the needs of the design and construction schedule. Through the efforts of the contractor, engineer and supplier working closely together to achieve project goals, this fast-track, complex project was completed on schedule.
The W Victory's concrete frame structure includes a combination of monostrand, unbonded PT systems and bonded, multi-strand PT systems. Unbonded PT systems were used in typical levels, while bonded PT systems were specified for the transfer girders on levels two, three and seven of the parking garage. The bonded PT provides optimum crack and deflection control, essential for the transfer girders that are required to carry the loads from the multi-story structure above. A standard unbonded PT system was used for interior applications, while an encapsulated unbonded PT system was used in exterior applications where corrosion could be an issue. In total, 482 tons of unbonded tendons and 32 tons of bonded tendons were used on the project.
The unbonded monostrand post-tensioning systems utilized 270 ksi, 0.5 in. strands, while the bonded multi-strand systems utilized 0.6 in. strand in plastic ducts. A flat duct system was used in certain locations to provide the optimum drape. The bonded PT system contains permanent grout caps and a premium non-bleed prepackaged grout. One-half inch galvanized barrier cables were also used in the parking garage.
In addition to controlling deflections and cracking, the use of bonded PT systems for the transfer beams reduced the amount of rebar, relieving congestion in these heavily reinforced members. For the North Tower, the use of PT helped the designers achieve the architectural vision for the structure. The flexibility of the unbonded PT system easily accommodated the unique curved shape of the building allowing longer spans with thinner members and creating a structure characterized by open spaces with minimal columns.