Seismic Behavior and Retrofit of Outrigger Beam-Column Frames
- 1 October 2001
- journal article
- research article
- Published by American Society of Civil Engineers (ASCE) in Journal of Bridge Engineering
- Vol. 6 (5), 340-348
- https://doi.org/10.1061/(asce)1084-0702(2001)6:5(340)
Abstract
A one-fourth scale outrigger beam-column frame with as-built details was tested to assess its performance under reversed cyclic loading and to develop a retrofit procedure suitable for moderate seismic regions. The ductility of the as-built frame was limited due to pullout of poorly embedded positive moment reinforcement in the joint and shear inadequacy in the joint and beam. Strut-and-tie truss idealizations were developed to aid in predicting the failure mechanism and failure loads. Sectional and nonlinear finite-element analyses were used to predict the performance of the as-built outrigger frames. The retrofit procedure involved fiber-reinforced concrete sleeving of the beam and the joint, together with column jacketing, to enable plastic hinging and energy dissipation to occur in the column. This retrofit solution increased the strength, ductility, and energy absorption of the system. The provision of high-performance fiber-reinforced concrete in the beam sleeve was very effective in controlling the cracks and hence would improve durability.Keywords
This publication has 9 references indexed in Scilit:
- Seismic Design and Retrofit of BridgesPublished by Wiley ,1996
- Steel Jacket Retrofitting of Reinforced Concrete Bridge Columns for Enhanced Shear Strength--Part 2: Test Results and Comparison With TheoryACI Structural Journal, 1994
- Steel Jacket Retrofitting of Reinforced Concrete Bridge Columns for Enhanced Shear Strength-Part 1: Theoretical Considerations and Test DesignACI Structural Journal, 1994
- Proof Test of a Retrofit Concept for the San Francisco Double-Deck Viaducts - Part 2: Test Details and ResultsACI Structural Journal, 1993
- Proof Test of a Retrofit Concept for the San Francisco Double-Deck Viaducts: Part 1 Design Concept,Details, and ModelACI Structural Journal, 1993
- Performance of bridges in the 1989 Loma Prieta earthquake – lessons for Canadian designersCanadian Journal of Civil Engineering, 1991
- Competing against Time: Report of the Governor's Board of Inquiry on the 1989 Loma Prieta EarthquakeEarthquake Spectra, 1990
- Seismic response of reinforced concrete frame subassemblages — a Canadian code perspectiveCanadian Journal of Civil Engineering, 1989
- Studies of Disturbed Regions Near Discontinuities in Reinforced Concrete MembersACI Structural Journal, 1988