A Lesson in Earthquake Engineering

June 29, 2009
Publication: Modern Steel Construction
Author(s): Paul Oyen

Abstract: Building 1 of the Glendale High School campus (in Glendale, Calif.) is not unlike other high school buildings in the area. Built in the late 1960s, the two-story brick structure houses administrative offices and the school library. However, one element that will set it apart from others of its type is the exposed seismic bracing that will become an identifying characteristic of the building, once a seismic retrofit is completed this summer. The roof is a cast-in-place slab over steel beams and tapered steel girders. The roof girders sit on second-story reinforced concrete and masonry bearing walls, and the second floor is a reinforced concrete pan-joist system supported by first-story reinforced concrete columns. There are no structural walls in the first story and no first-story columns at the corners, allowing the second-story walls to cantilever one full bay. The first floor is a reinforced concrete slab-on-grade, and the foundation of the structure is comprised of 18-in-diameter, 30-ft-deep, drilled piers in groups of two to four at each column. Grade beams tie the pile caps together.

Markets: Education - K-12