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Organization Title

OSMS 84-06

"CSMIP Strong-Motion Instrumentation and Records From Transportation Structures - Bridges"

by A.F. Shakal, J.T. Ragsdale and R.W. Sherburne

Shakal, A.F., J.T. Ragsdale and R.W. Sherburne (1984). CSMIP Strong-Motion Instrumentation and Records From Transportation Structures - Bridges, in ASCE National Convention, San Francisco, CA, October 4-5, 1984, p.117-132.

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Introduction

Seven transportation structures have been instrumented by the California Strong Motion Instrumentation Program (CSMIP), including four bridges. The instrumentation configurations are presented for these bridges, with a discussion of the planning guidelines used in selecting and instrumenting the structures. Significant records (in excess of 0.25 g maximum acceleration) have been obtained from three highway bridges. At one bridge, a freeway overpass on Hwy 101 in Rio Dell (near Eureka in northern California), strong shaking has been recorded from three separate earthquakes. Preliminary analyses of a subset of these records indicate that the vertical response of the bridge superstructure was much greater than the horizontal response.