[WRE UPDATE | PROJECT]
hotel, which will be in a separate 12 story building in the mixed use complex. Parking for more than 1,200 cars will be provided in a new underground garage. Te Rainier Square redevelopment project is being
designed by architecture firm NBBJ. Construction is planned to begin in early 2017 with the first tenants occupying the tower portion of the project in late 2018. Wright Runstad president Greg Johnson said in a press release that the company has “several active negotiations underway, including with a major hotel operator.” Te team behind MKA have seen proof of their
effectiveness. In 1995, MKA incorporated a tuned liquid mass damper (TLMD) at the Highcliff Apartments in Hong Kong, which was the first high-rise to incorporate such a device and has proved successful in steadying the building during windy conditions, the company said. “Over the past 30 years, MKA has been instrumental
in the development of damping systems for buildings, including many ‘first-ever’ industry applications,” the company writes on its website. “Damping can be used in high-rise buildings to control lateral accelerations, reduce occupant perception of motion, and lower construction costs. Tey can also be used in non-high-rise buildings to absorb energy imposed by an earthquake. Dampers are a cost-effective method of minimizing structural damage without resorting to a more traditional approach of increasing building stiffness through enlarged and intrusive structural elements.”
72 JANUARY-FEBRUARY 2016 WIRE ROPE EXCHANGE
Other buildings throughout the city have implemented their own methods of earthquake risk mitigation. For example, if you’ve ever watched a Seattle Seahawks game at CenturyLink Field (or seen one televised from Seattle), you’ve probably noticed the two distinctive arches on either side of the stadium. “CenturyLink Field’s two steel-tied arches, spanning 220m (720 feet), are ‘decoupled’ from the main stadium structure using friction pendulum dampers located at the top of each roof support tower. Tis unique design allows the roof to move independently from the bowl during an earthquake, reducing forces and minimizing damage,” according to MKA.
MKA has also incorporated other methods of minimizing natural forces, including using hyper efficient visco-elastic dampers at the 56-story Two Union Square to reduce sway, and minimizing vibrations in Seattle’s Benaroya Hall using “a unique system of vertical and horizontal rubber bearings to isolate the urban world-class performance hall from vibrations induced by below-grade bus and train tunnels.” Moving forward, Klemencic says Seattle developers
are taking seismic forces into account when constructing new buildings. “Tere is a rigorous design and review process which focusses on seismic performance of these significant buildings,” Klemencic said. y
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