Report No.: CCEER-91-2
SOIL-FOUNDATION-STRUCTURE BEHAVIOR AT THE OAKIAND OUTER HARBOR WHARF
Authors: G. Norris, R. Siddharthan, Z. Zafir, S.
Abdel-Ghaffar, and P. Gowda
Date: July 1991
Sponsoring Agency: California Department of Conservation, Division of Mines and
- Performing Organization:
- Department of Civil Engineering/258
- University of Nevada, Reno
- Reno, NV 89557
- This paper discusses the use of CSMIP records at Oakland Outer Harbor Wharf (along with
records from Yerba Buena and Treasure Island) to study the free-field motions at Oakland
Outer Harbor, both at shallow depth and to bedrock, and the possible softening
of soils surrounding the piles supporting the instrumented wharf. The paper also discusses
the determination of the motion on the instrumented wharf using free-field motion input
and deflection compatible lateral and vertical pile foundation stiffnesses. Such derived
motion compares well with the recorded motions on the deck. While there was no reported
liquefaction at the site, there was at nearby locations; and the consequence of an assumed
lower relative density of the near-surface sand at Oakland Outer Harbor is discussed.
Likewise, the consequence of a change in the orientation of the wharf or the incoming
motions, assessed by interchanging the direction of the free-field motions, is presented.
These latter changes reflect conditions under which a soil-foundation interaction failure
or structural failure of the batter piles may have developed, failures that occurred at
facilities nearby (Abstract by authors).