Innovative technique for seismic upgrade of RC square columns

Andrea Prota, Gaetano Manfredi, Alberto Balsamo, Antonio Nanni, Edoardo Cosenza

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

The preliminary results of an experimental investigation on under-designed RC square columns are presented in the paper. The seismic upgrade was achieved by combining steel spikes and GFRP laminates. Two parameters are investigated: the lap splice of the longitudinal steel reinforcement and the level of axial load. A comparison between as-built and strengthened columns is presented in terms of strength and ductility. The shear-top displacement relationships of strengthened columns are analyzed to assess the influence on the global performance of the lap splice. This preliminary analysis confirms that the proposed solution for the seismic strengthening of under-designed columns is very effective when it is necessary to relocalize the potential plastic hinges of columns by increasing their flexural strength. The obtained results will represent the basis for developing design criteria for the strengthening of similar interventions and will represent a reference for the calibration of a model of the strengthened column.

Original languageEnglish (US)
Title of host publication7th International Symposium on Fiber-Reinforced Polymer (FRP) Reinforcement for Concrete Structures
EditorsCarol K. Shield, John P. Busel, Stephanie L. Walkup, Doug D. Gremel
PublisherAmerican Concrete Institute
Pages1289-1303
Number of pages15
ISBN (Electronic)9780870311895
StatePublished - Oct 1 2005
Externally publishedYes
Event7th International Symposium on Fiber- Reinforced Polymer Reinforcement for Reinforced Concrete Structures, FRPRCS 2005 - Kansas City, United States
Duration: Nov 6 2005Nov 10 2005

Publication series

NameAmerican Concrete Institute, ACI Special Publication
VolumeSP-230
ISSN (Print)0193-2527

Conference

Conference7th International Symposium on Fiber- Reinforced Polymer Reinforcement for Reinforced Concrete Structures, FRPRCS 2005
Country/TerritoryUnited States
CityKansas City
Period11/6/0511/10/05

Keywords

  • Column
  • Ductility
  • FRP
  • Smooth bars
  • Strength hierarchy

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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