Pull out tests to study anchorage / bond on concrete specimen with embedded helical end rebar (HER)
By: Saraswathi, Adla
.
Contributor(s): Rao, C.B.K | Seshu, Rama.
Publisher: Chennai CSIR- Strctural Engineering research Centre 2021Edition: Vol.48, Issue 04.Description: 265-273p.Subject(s): Civil Engineering | Helical End Rebar | Helix Coefficient | Headed Bar | Concrete
In:
Journal of structural engineering (JOSE)Summary: n order to develop full stress, rebar needs to be extended beyond a
section for a length equal to development length in a reinforced
concrete member. U-Hook or bent up bar is a solution to overcome the
problem of development length, but congestion of reinforcement is an
issue. Many a time, there will be shortfall, and mechanical anchorages
or headed bars in place of hooks were used to overcome the
congestion issue. An alternative method of anchorage with Helical End
Rebar (HER) was investigated by conducting a pull-out test. HER may
not fully address the issue of congestion. Parameters considered in
the investigation are the diameter of the coil, pitch of coil and number
of coils embedded in concrete. All these are combined as helix
coefficient. It is found that the helix coefficient influences the
anchorage of Helical End Rebar.
| Item type | Current location | Call number | Status | Date due | Barcode | Item holds |
|---|---|---|---|---|---|---|
Articles Abstract Database
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School of Engineering & Technology (PG) Archieval Section | Not for loan | 2022-0267 |
n order to develop full stress, rebar needs to be extended beyond a
section for a length equal to development length in a reinforced
concrete member. U-Hook or bent up bar is a solution to overcome the
problem of development length, but congestion of reinforcement is an
issue. Many a time, there will be shortfall, and mechanical anchorages
or headed bars in place of hooks were used to overcome the
congestion issue. An alternative method of anchorage with Helical End
Rebar (HER) was investigated by conducting a pull-out test. HER may
not fully address the issue of congestion. Parameters considered in
the investigation are the diameter of the coil, pitch of coil and number
of coils embedded in concrete. All these are combined as helix
coefficient. It is found that the helix coefficient influences the
anchorage of Helical End Rebar.
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