101 Continental Boulevard

SGH performed linear dynamic and nonlinear static (pushover) analyses of the unretrofitted structure and designed a retrofit using a nonlinear dynamic procedure to address deficiencies in:

• Pre-Northridge moment-frame panel zones, beam-column connections, and column splices
• Columns with insufficient design strength under combined axial-flexural loading and lacking strong-column-weak-beam behavior
• Shear wall panels, including connections to certain footings

Our seismic retrofit design included:

• Adding fluid viscous dampers to existing perimeter steel moment frames above grade
• Providing additional framing at the second floor to act as collectors
• Strengthening some columns to increase overturning performance
• Strengthening certain concrete shear wall panels and foundation elements

For the renovation of the public spaces, SGH evaluated the first floor plaza framing to determine the allowable superimposed landscape loading and also designed:

• A new steel-framed bridge and plaza extension connecting the plaza to the parking lot
• Modifications to a stand-alone amenity structure supported on the plaza framing
• Facade elements (e.g., shades, glass wall supports, and framing for entry doors)
• Landscape elements, including concrete retaining walls, benches, and other features

SGH provided construction administration services, including coordinating with city inspectors, reviewing submittals, visiting the site to observe ongoing construction, and helping the contractor address field conditions.