Experimental And Numerical Studies On Precast Bridge Columns With Shifted Plastic Hinging

Abstract

Grouted sleeves (GSs) have received considerable attention from transportation agencies and contractors for use in accelerated bridge construction (ABC) connections in seismic zones because of their good construction tolerances and load transfer between precast concrete elements. This paper presents the experimental and numerical results of three large-scale precast column models with GS connections and one traditional cast-in-place (CIP) model. The GS columns were designed and tested using a shifted plastic hinge (SPH) mechanism that shifted the critical section above the sleeve region. The experimental program investigated the effect of splicing details and moment gradient on SPH formation and thus ductility. The columns were subjected to quasi-static cyclic loading in a cantilever configuration. A numerical modeling procedure using force-based beam column elements with fiber sections was developed for GS and CIP column models. Strain penetration of the bar into the footing and both ends of GS coupler was incorporated using rotational springs. The numerical model was calibrated with material tests and uniaxial tension tests on the GS assemblies. The numerical results showed good agreement with the experiments when comparing the hysteretic load-displacement, achieved ductility level, and energy dissipation.

Publication Date

1-1-2018

Publication Title

11th National Conference on Earthquake Engineering 2018, NCEE 2018: Integrating Science, Engineering, and Policy

Volume

1

Number of Pages

156-166

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

85085492288 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85085492288

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