by K. Kasai, W.D. Liu and V. Jeng
Kasai, K., W.D. Liu and V. Jeng (1992). Effect of Relative Displacements Between Adjacent Bridge Segments. SMIP92
Seminar on Seismological and Engineering Implications of Recent Strong-Motion Data, p. 9-1 - 9-12.
Click on the link below for the full text:
This paper presents the results of a study on the responses of the San Juan Bautista 101/156
Separation Bridge instrumented by the California Division of Mines and Geology under its Strong
Motion Instrumentation Program (CSMIP). The bridge experienced three significant earthquakes as
follows: 1979 Coyote Lake earthquake (before seismic retrofit), 1984 Morgan Hill earthquake
(after seismic retrofit), and 1989 Loma Prieta earthquake. The recorded seismic responses during
the three earthquakes are analyzed and correlated with theoretically predicted responses.
Adjustments of structural parameters and modeling concept to achieve satisfactory correlations
are discussed. Important characteristics of relative motions between adjacent bridge segments
are explained based on the records and analyses. Comments are also given regarding the
performance of cable restrainers for seismic damage mitigation.