The Earthquake Engineering Online Archive  NISEE e-Library

Berkeley Campus Retrofit: Central Dining Facility

	Image-CR0308 Construction sign for facility. (University of California, Berkeley)
	Image-CR0309 Ground floor view of steel framing and large, unbonded (buckling restrained) braces. (University of California, Berkeley)
	Image-CR0310 Close-up detail of longer unbonded brace (buckling restrained) connection to steel framing. (University of California, Berkeley)
	Image-CR0311 View of interior of ground floor showing arrangement of unbonded braces (buckling restrained) connected to concrete foundation and large steel framing. (University of California, Berkeley)
	Image-CR0312 Close-up of connection detail for unbonded brace (buckling restrained) and steel framing. (University of California, Berkeley)
	Image-CR0313 Detail of unbonded brace (buckling restrained). (University of California, Berkeley)
	Image-CR0314 Arrangement of unbonded braces in ground floor area. (University of California, Berkeley)
	Image-CR0315 Bolted connection detail of steel frame, south side of building. (University of California, Berkeley)
	Image-CR0317 Close-up of connection detail of unbonded brace (buckling restrained) to reinforced concrete foundation. (University of California, Berkeley)
	Image-CR0330 Unbonded braces, a special form of buckling restrained bracing, are part of several new construction and seismic retrofit projects on the Berkeley campus, including the Stanley Hall replacement building. These "unbonded braces" are manufactured by Nippon Steel in Japan. By encasing a core of high performance steel within a concrete matrix confined by a steel tube, the brace exhibits nearly identical properties in tension and compression and has substantial ability to undergo numerous cycles of inelastic deformations without degradation or fracture. Photo depicts a full-scale, one-bay, 2-story subassemblage test of concentrically braced frames (chevron) with 2 unbonded braces. Testing was done at the Structural Engineering Research Laboratory in Davis Hall on the Berkeley campus. Further details of this test program are available in: Mahin, Urtiz et al.

Berkeley Campus Retrofit