Beverly Hills City Hall Seismic Strengthening

Beverly Hills, California

Beverly Hills City Hall is an irregularly shaped nine-story building, which includes a four-story “H”-shaped lower portion and five-story tower. The building was constructed in 1930-32 with concrete roof and floor systems, perimeter concrete walls perforated by numerous window openings and a conventional shallow concrete foundation system. The structurally complex building is of non-ductile concrete (NDC) construction.

MHP completed an initial seismic risk assessment of the building that identified potential vulnerabilities, and subsequently performed a detailed Tier 2 seismic evaluation including three-dimensional computer modeling. The modeling identified specific vulnerabilities that could be addressed to reduce risk, and conceptual strengthening designs were developed. MHP began the design process for strengthening in early 2019.