Replaceable Hinge Detailing for Bridge Columns


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Title: Replaceable Hinge Detailing for Bridge Columns

Author(s): J. B. Mander and C.-T. Cheng

Publication: Special Publication

Volume: 187


Appears on pages(s): 185-204

Keywords: bridge columns; earthquake resistance; failure; fatigue; fracture

Date: 6/1/1999

As low cycle fatigue failure in the longitudinal reinforcement is unavoidable, it necessitates the concept of using replaceable plastic hinges in which specially-detailed reinforcing fuse-bars are installed. Three one-third scale model pier specimens were constructed. The first renewable-hinge column was tested and repaired five times. The second pre-cast column was also constructed using the fuse-bar connections and subsequently repaired ten times. For comparative purposes, a conventionally reinforced column was constructed and tested. It was found that each of the repaired columns performed as well as the undamaged virgin columns. This new approach to construction enables rapid restoration to full service following a damaging earthquake.