Behavior of a Structure Strengthened Using Reinforced Concrete Piers

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Title: Behavior of a Structure Strengthened Using Reinforced Concrete Piers

Author(s): Thomas D. Bush, Jr., Carol Roach Talton and James O. Jirsa

Publication: Structural Journal

Volume: 87

Issue: 5

Appears on pages(s): 557-563

Keywords: beams (supports); columns (supports); dowels; epoxy resins; earthquake-resistant structures; failure mechanisms; frames; grout; piers; reinforced concrete; renovating; repairs; stiffness; strengthening; structural design; Structural Research

Date: 7/1/1990

Abstract:
A strengthening technique to improve the seismic behavior of a nonductile frame-type structure was investigated experimentally. The technique utilized cast-in-place piers, which partially encased the original columns and were attached using epoxy-grouted dowels. A two-thirds scale frame model consisting of two bays and three levels was subjected to statically applied cyclic lateral load. Test results indicated the governing failure, mechanism was shifted from column shear failure to flexural hinging of the beams. The strengthened frame behaved monolithically, exhibiting substantial increases in both lateral stiffness and strength.