by Robert Dowell
Dowell, Roert (2004). Seismic Analysis of the Sylmar Interstate 5 and Highway 14 Connector Bridge. SMIP04
Seminar on Utilization of Strong-Motion Data, p. 41 - 60.
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This paper presents measured and analysis time-history results of the heavily
instrumented 10-span North Connector Bridge (53-2795F) at the 5/14 Interchange,
subjected to the M7.1 Hector Mine earthquake. Relatively simple spine and more
detailed shell element models were developed. Measured base motions were used
as input for the finite element models, with absolute and relative superstructure
displacement time-histories compared to measured responses. Results show that 5%
equivalent viscous damping is realistic, as is the concrete strength of 5 ksi. It
was found that the rotational mass inertia of the superstructure is an important
quantity for spine models of single-column-bent bridges.