About the author  ⁄ Isaac Williams, C.E.

Isaac Williams is a Senior Project Engineer with Tipping Structural Engineers, located in Berkeley, CA (i.williams@tippingstructural.com).

1951 Harbor Bay Parkway, a new building (Figure 1) located in Alameda, CA, was developed privately for use as commercial office space by a life-sciences company. The project provided the opportunity to utilize an innovative approach for seismic bracing that provides improved performance and cost-effectiveness over conventional braced-frame systems. The system uses concentric buckling-restrained braces (BRBs) in conjunction with a vertical mast or strong-back to reduce drift, eliminate weak stories, and increase redundancy. The yielding BRBs work in tandem with an elastic mast frame to create controlled rocking behavior that provides more resiliency and improved protection for the building frame, cladding, and interior construction.

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