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248

The Pickett effect at early age and experiment separating its mechanisms in tension



Title: The Pickett effect at early age and experiment separating its mechanisms in tension
Author(s): S. A. Altoubat, D. A. Lange
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 35
Issue: 248
Issue date: 2002-05-01
Publication year: 2002
Pages: 211 - 218
Total Pages: 8
Nb references: 16
Language: English


Abstract: Reports on the very brittle and splitting mode of failure of tension lap splices anchored in high strength concrete (HSC)specimens and the lower normalized bond stress (u/(racine) f' (c)) for high strength than for normal strength concrete,instigated several research projects aiming at recommending mechanisms to provide confinement and ductility for bars or splices anchored in HSC.
The stateof-the-art report of ACI Committee 363,ACI 363R-84, defines high strength concrete as concrete with compressive strength above 6,000 psi (41.
4 MPa).
The main objective of the research reported in this paper was to assess the effect of transv rse reinforcement on bond strength and ductility of the mode of failure of tension lap splices anchored in HSC beam specimens with nominal concrete compressive strength 55 MPa (8,000 psi),and to recommend a transv rse reinforcement design requirement related to the ACI transv rse reinforcement index K(tr.
) To meet the objective,fifteen full-scale HSC beam specimens were tested.
No pozzolanic mat rial such as silica fume or fly ash was added to achiev high strength to avoid any effect such material might impose on structural behavior.
Each beam was designed with bars spliced in a constant moment region at midspan.
The variables used in the investigation were bar size,and the amount of transverse reinforcement placed in the splice region.


Online publication: 2002-03-27
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/13730


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