HOTEL CHURCHILL...Constructed in 1914, this historic San Diego landmark received a major facelift...
Transcript of HOTEL CHURCHILL...Constructed in 1914, this historic San Diego landmark received a major facelift...
HOTEL CHURCHILL
SEAOSD/SEAOC 2017 EXCELLENCE IN STRUCTURAL ENGINEERING AWARDS
OWNER/DEVELOPER SAN DIEGO HOUSING COMMISSION
ARCHITECT STUDIO E ARCHITECTS
CONTRACTOR ALLGIRE GENERAL CONTRACTORS
STRUCTURAL ENGINEER KPFF CONSULTING ENGINEERS
Project Description
Constructed in 1914, this historic San Diego
landmark received a major facelift and seismic
retrofit to provide 72 affordable housing units
for veterans and homeless youth. Facts on the
original building:
• Cast-in-place concrete floor framing and
columns
• Lateral system used a combination of
concrete shearwalls & hollow clay tile infill
in upper floors.
• Originally six stories with an unreinforced
masonry 7th floor added in 1930
• Significant weak/soft story deficiency at the
1st floor with high probability of collapse
Seismic Retrofit Scope
This project was the first viscous fluid damper
retrofit of an historic building in the City of San
Diego. The voluntary retrofit which underwent a
comprehensive peer review included:
• Infill moment frames in combination with the
viscous dampers at ground floor
• Shearwalls and new foundations in basement
• Carbon FRP strengthening of diaphragms and
columns
• New steel collectors at 2nd story
• Significant mass reduction of the building
• Time history analysis with non-linear dampers
in ETABS
Non-Seismic Renovations
Other significant structural work included:
• Removal of a non-conforming elevator and a
widening of the existing shaft for a new elevator
• New glass-clad full-height exterior feature stair
• Large opening cut in the middle of the building
for a new interior steel stair
• Complete removal and replacement of the 7th
story with a new lighter steel framed roof
• Rebuild of the 20’-0” tall historic rooftop signage