KPFF Consulting Engineers
Oregon State University
Walsh Construction Co
Framework’s design employs a first of its kind rocking wall core made from nine-ply Cross-Laminated Timber (CLT). Designed to resist the seismic forces generated during a 2500 year seismic event, the building core is capable of rocking, and then recentering itself with no damage to the primary structural system. Post-tensioned steel rods extending the entire length of each building core wall, as well as replaceable U-Shaped Flexural Plates (UFPs) at each floor level absorb the force of a seismic event. This technology, which originated during the 1960s, was further developed following the 2011 Christchurch earthquake in New Zealand.
The team’s all-wood solution, has been designed to integrate “low-damage design” concepts, which reduce repair/replacement costs and downtime following a significant earthquake. The concept exceeds basic life-safety performance requirements by creating a resilient and easily repairable solution; avoiding the need to tear down the building following an earthquake. Once complete, Framework will have the tallest post-tensioned rocking wall in the world.