by Gregory L. Fenves and Reginald DesRoches
Fenves, Gregory L., and Reginald DesRoches (1994). Response of the Northwest Connector in the Landers and Big Bear Earthquakes. SMIP94
Seminar on Seismological and Engineering Implications of Recent Strong-Motion Data, p. 61 - 74.
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The strong motion records from the Northwest Connector (located in Colton, Calif.) in the 1992
Landers and Big Bear earthquakes provide valuable information about the seismic behavior of this
common type of freeway bridge. Modeling of the bridge with reasonable estimates of the column
stiffness and pile foundation properties and with gap elements for the intermediate hinges
provides a good correlation between the computed and the recorded earthquake response of the
bridge. Pounding of the hinges produces large acceleration spikes, causing sharp increases in
the column shear forces. Since modeling the hinge opening-closing is relatively simple, this
type of analysis is recommended for the design of multiple-frame bridges.