Once finished in early 2016, the Ocosta replacement elementary school in Westport, WA will be the first tsunami vertical evacuation structure in the country. Tsunami-resistant design for the building was performed using provisions which will be published in ASCE 7-16. A benchmarked site-specific inundation model was used for hazard characterization. The school structure was designed to resist hydrostatic, hydrodynamic, scour, and impact forces through various strategies. Pile foundations were designed to resist potential liquefaction at the site and provide residual gravity and lateral resistance with the upper 3.7 m of soil assumed to be scoured. Concrete shear walls were designed to resist seismic and inundation-related lateral forces and offer toughness and ductility to resist impact loads. Structural steel gravity columns were designed to resist expected impact loads and moment-resisting beam-column connections at the refuge level provide alternate-path progressive collapse resistance for unexpected impact forces.
展开▼
