The Behavior of R/C Pinned Bridge Columns under Lateral Loading

by M. Saiidi, Univ of Nevada, Reno, NV, USA,
J. Orie, Univ of Nevada, Reno, NV, USA,
B. Douglas, Univ of Nevada, Reno, NV, USA,



Document Type: Proceeding Paper

Part of: Bridges and Transmission Line Structures

Abstract:

Four one-eighth scale one-way hinge details of the type used in highway bridges were tested to study the effect of combined shear and flexure caused by lateral loads. The aspect ratio was changed from one to three. Three of the specimens were subjected to monotonic loads, and one was subjected to cyclic loads. The study showed that, even for an aspect ratio of one, flexure controlled the load capacity. The displacement ductility capacity dropped, however, as the aspect ratio changed from three to one. The results also showed that the shear friction theory is not appropriate for estimating the shear strength of hinges and that the theory leads to unconservative results. A reasonable estimate of shear strength can be obtained if between one-third and one-half of the bars in the hinge are assumed to be effective in leading to friction forces.

Subject Headings: Lateral loads | Shear strength | Highway bridges | Load bearing capacity | Hinges | Cyclic loads | Bridge columns

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