Shifted Plastic Hinging For Grouted Sleeve Column Connections

Keywords

Bridge column; Grouted sleeves; Precast column; Seismic performance; Shifted plastic hinge

Abstract

Accelerated bridge construction (ABC) is being increasingly used in new bridge construction and repair. For bridge substructure elements, ABC typically requires connections, such as mechanical couplers, between prefabricated elements where moment demands are largest. Grouted sleeves (GSs) offer good construction tolerances and load transfer between precast concrete elements. Therefore, they have gained interest for use in ABC in seismic regions. Large-scale precast column models using GS splices were designed and tested using a shifted plastic hinge (SPH) concept to minimize the damage in the footing and retain the column ductility. The testing matrix considered aspect ratio, moment gradient, and splicing details. Results showed that SPH can be used for flexural and flexural-shear columns; plastic hinging formed above the sleeve region and footing dowels remained elastic to minimize footing damage. Each precast column exhibited good ductility and energy dissipation, and formed slightly shorter SPH length compared with conventional columns.

Publication Date

7-1-2018

Publication Title

ACI Structural Journal

Volume

115

Issue

4

Number of Pages

1101-1114

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.14359/51702233

Socpus ID

85049750452 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85049750452

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