Innovative Technique for Seismic Upgrade of RC Square Columns

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.

Department(s)

Civil, Architectural and Environmental Engineering

Comments

Foundation for Rehabilitation Psychology, Grant None

Keywords and Phrases

Column; Ductility; FRP; Smooth bars; Strength hierarchy

International Standard Book Number (ISBN)

978-087031189-5

International Standard Serial Number (ISSN)

0193-2527

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 American Concrete Institute, All rights reserved.

Publication Date

01 Oct 2005

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