Mechanical lap splicing for rebars

OKABE Splice Clip joint(OS Clip joint)
OKABE Co.,Ltd.

Copyright (C) 2010 OKABE Co.,Ltd.. All rights reserved.

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OS Clip joint consists of ・・・
・An oval shaped steel sleeve with a wedge-hole
・A wedge pin

Connection for small diameter Rebars ・・・・The sleeve is positioned around two overlapping rebars.
・The wedge pin is driven into a wedge-hole with a portablehydraulic wedge-driver,and between the rebars.
OS Clip joint

Features ・・・・Simple and Quick
・High reliability
・Skilled workers not requiredSleeve(Pls be sure to follow instruction)・Can make under almost any
weather condition.
・Certified by Japanese
evaluation organization.
Copyright (C) 2010 OKABE Co.,Ltd.. All rights reserved.

Wedge-hole
Wedge pin
Wedge-driver2

OS Clip joint - Installation procedures
Place the sleeve over one end of the rebar;
Each bar extends out of the sleeve at least
one bar-diameter.
Place the wedge pin with the wedgedriver.

Operate the wedge-driver.

Check the completionof pin-driving.

Copyright (C) 2010 OKABE Co.,Ltd.. All rights reserved.

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OS Clip joint － Dimensions
Note: The figures indicats below is JAPAN only.

■Sleeve

Unit: mm

Rebar
size

Length
“L”

Outer
“OD1”

Outer
“OD2”

Thickness

Hole Dia.

“t”

“WH”

D103530

18.2

3.1

10.2

D1340

39

24.6

4.5

D1660

46.3

29

D1970

56.5

D2280

64.5

■Wedge pin

Unit: mm

Rebar
size

Length“L”

Diameter
“D”

“L1”

10.2

D10
D1337

10

125

14.8

D1643

1410

346

16.8

39

7

16.8

D19
D2248

1610

Scope of rebars to be spliced; JIS G 3112
Grade : SD295A,SD295B,SD345
Nominal size. : D10,D13,D16,D19
Deformation : specified in JIS G 3112
Copyright (C) 2010 OKABE Co.,Ltd.. All rights reserved.

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Performance of OS Clip joint (1/3)
Monotonic tensile test of OS Clip joint in air
As the results of tensile test in air,・Ultimate strength of OS Clip joint is higher than 135%of the specified yield strength of the rebar.
・Failure case is a rupture of the rebar.
・Under applied stress of about 100MPa, there tends to besoftened splice-system caused by the rotation of the splice.

Main results of tensile testSpecified
Value

Specimen *No.1

No.2

Yield strength of rebar fy

295MPa373MPaTensile strength of rebar fu

440MPa522MPaNo.3

Ultimate strength of splice fus---

512MPa509MPa517MPaRatio

fus / fy(specified)

---

1.74

1.73

1.75

Ratio

fus / fu(specified)

---

1.16

1.16

1.18

Ratio

fus / fu(actual)

---

0.98

0.98

0.99

Specimens after tensile test

Copyright (C) 2010 OKABE Co.,Ltd.. All rights reserved.

Note * Rebar Grade; SD295A (JIS G3112)
Nominal size; D105Performance of OS Clip joint (2/3)
Multi-cyclic bending test for RC columns
As the result of multi-cyclic bending test of RC columns;
specimen A: hoops using OS Clip joints
specimen B: hoops using flare-welding splices
・OS clip joint eith almost equal performance with bucklingconstraint of longitudinal rebars and confined-effect of core-concrete compared with hoops using flare-welding splices.

Load (kN)

B)Hoops using
flare-weldingsplices

Displacement (mm)It is expected that hoops using OS Clip joints shoe effective
performance in plastic hinge area.

Load (kN)A)Hoops using
OS Clip joints

Displacement (mm)A) Hoops with OS Clip joints

B) Hoops with flare-welding splicesPhoto) Plastic hinge area after loading
Copyright (C) 2010 OKABE Co.,Ltd.. All rights reserved.

Bending load – displacement relationship
6Performance of OS Clip joint (3/3)
Compressive loading test for RC short-columns
As the result of compressive loading test; Hoops of column are fabricated as follows;
specimen A: hoops using OS Clip joints, specimen B: hoops using 135deg.hooks
・Both specimens have approximately the same maximum-strength.
・After reaching the maximum load, load-decrease of specimen A is smaller than that of specimen B,and specimen A maintained about 40% of the maximum load.
・At specimen B, 135deg.hooks were pulled out form core-concrete of the column.
Hoops with OS Clip joints shou more effective performance in the confinement of core-concrete andbuckling-constraint of longitudinal rebars compared with hoops using 135deg.hooks.

A)Using OS Clip joints

B)Using 135deg.hooks

A)Hoops with OS Clip joints

B)Hoops with 135deg.hooks*135deg.hooks were pulledout from core-concretePhoto) Hoops and longitudinal rebars after loading

Copyright (C) 2010 OKABE Co.,Ltd.. All rights reserved.

Compressive load – displacement relationship

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OS Clip joint ー Typical applications in Japan

Hoops for RC Column

Reinforcements for SRC beam-Column joint

Rebar-Cage for Cast-in-place concrete pile
Copyright (C) 2010 OKABE Co.,Ltd.. All rights reserved.

Seismic reinforcement
8OS Clip joint ー Typical applications in Japan

Connection for Precast-concrete walls

Connection for Precast-concrete slabs

Copyright (C) 2010 OKABE Co.,Ltd.. All rights reserved.

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