Lap-Spliced Rebar Connections with UHPC Closures

AbstractUltrahigh performance concrete (UHPC) is gaining attention from the bridge community as a compelling option for closure pours that complete prefabricated bridge element (PBE) connections; these connections typically use field-cast UHPC cast over noncontact lap-spliced reinforcing bars to ach...

Full description

Saved in:
Bibliographic Details
Published in:Journal of bridge engineering 2018-06, Vol.23 (6)
Main Authors: Haber, Zachary B, Graybeal, Benjamin A
Format: Article
Language:English
Subjects:
Bond strength
Bonding strength
Bridge construction
Bridge decks
Bridges
Civil engineering
Closures
Concentration (composition)
Cyclic loading
Cyclic loads
Precast concrete
Prefabrication
Rebar
Reinforced concrete
Reinforcing steels
Technical Papers
Testing
Ultra high performance concrete
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:AbstractUltrahigh performance concrete (UHPC) is gaining attention from the bridge community as a compelling option for closure pours that complete prefabricated bridge element (PBE) connections; these connections typically use field-cast UHPC cast over noncontact lap-spliced reinforcing bars to achieve structural continuity between elements. The goal of this study was to investigate the behavior of different commercially available UHPC-class materials for prefabricated bridge deck connections using noncontact lap splices. Two types of experiments were conducted to assess performance: a direct tension pullout test and a component-level prefabricated-bridge-deck connection test. The objective of the pullout testing was to investigate the effect of the UHPC fiber-volume fraction on UHPC-to-rebar bond strength and compare the performances of different UHPC specimens with existing design guidance. Component-level testing was used to investigate the bond between the UHPC and precast concrete, cracking behavior under cyclic loading, behavior during long-term cyclic loading, and monotonic ultimate-loading behavior. Findings indicated that available design guidance held for different UHPC-class materials. Furthermore, test results were used to propose additional guidance related to the UHPC fiber-volume fraction and cover requirements.
ISSN:1084-0702
1943-5592
DOI:10.1061/(ASCE)BE.1943-5592.0001239