Title:
Proof Test of a Retrofit Concept for the San Francisco Double-Deck Viaducts: Part 1 Design Concept,Details, and Model
Author(s):
M. J. N. Priestley, F. Seible, and D. L. Anderson
Publication:
Structural Journal
Volume:
90
Issue:
5
Appears on pages(s):
467-479
Keywords:
beams (supports); bridges (structures); columns (supports); ductility; earthquake-resistant structures; joints (junctions); shear properties; structural design; torsion; Design
DOI:
10.14359/3967
Date:
9/1/1993
Abstract:
In this, the first of a two-part paper, the design deficiencies of the San Francisco double-deck viaducts are discussed. The development of a retrofit concept for upgrading portions of the viaducts with regular geometry to standards of seismic performance equal to or higher than those expected of new bridges is presented. This concept was verified by construction of a one-half full-size, 100-t (90,000-kg) model of a typical section of double-deck viaduct that was tested under simulated seismic forces and displacements. The size of the test specimen, the stiffness of the structural system, and the one-line test control with 14 hydraulic actuators make this test one of the most complex civil structural tests ever carried out. Details of the model and test design, and of analyses predicting the response capacity, are presented in this first paper. The test program, including test results and comparison with predictions, are presented in a companion paper.