ABORATORY TESTING OF INTEGRAL BUTMENT BRIDGE DETAILS …
Transcript of ABORATORY TESTING OF INTEGRAL BUTMENT BRIDGE DETAILS …
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LABORATORY TESTING OF INTEGRAL ABUTMENT BRIDGE DETAILS FOR ABC
PROJECTS
FIU Webinar By: Sam Redd
July 2016
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Overview: Integral Abutment
Integral Abutment Jointed Abutment
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Overview: Integral Abutment in ABC
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Overview: Grouted Coupler
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Edison Bridge in Florida
Overview: Grouted Couplers
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1) Cast-in-place (CIP) – Iowa DOT design
2) Grouted Rebar Coupler – Dayton Superior Sleeve-Lock Coupler
3) Pile Coupler – HP pile section using CMP voids and grout
Laboratory Specimen 6
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• Integral Connection - #8 bars @ ~12 in. O.C. along front and back face
Control: Cast-In-Place (CIP) Specimen Iowa DOT Design Detail
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• Splice the pile cap and integral diaphragm for ABC application
• Seventeen #8 Bars and Grouted Couplers
Grouted Coupler Specimen
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Grouted Couplers: Conceptual
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24” CMP
Section A - A Section B - B
Pile Coupler Specimen 10
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Pile Coupler Specimen
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Pile Coupler Concept
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Laboratory Specimen Construction
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Typical dimensions for all specimens
Laboratory Specimens
8’
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Control: Cast-In-Place (CIP) Specimen Iowa DOT Design Detail
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Grouted Coupler – Pile Cap 16
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Grouted Coupler - Template 17
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Grouted Coupler – Integral Diaphragm
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Grouted Coupler - Alignment 19
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Grouted Coupler Specimen 20
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Pile Coupler – Pile Cap 21
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Pile Coupler – Integral Diaphragm 22
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Pile Coupler – HP Guides and Lid
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• CMP Lid - 1/8” Sheet metal circle or octagon w/ #4 Rebar guides welded in place • U-bolt and aircraft cable to lower pile
CMP Lid and HP section 24
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Pile Coupler – Grout Vent 25
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Pile Coupler – 3” Grout Duct 26
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Pile Couplers Suspended
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Pile Coupler Specimen – Construction Process
Step 2: Place grout bed dams
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Pile Coupler Specimen – Construction Process
Step 3: Place grout bed; remove dams
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Step 4: Lower HP Section
Pile Coupler Specimen – Construction Process 30
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Step 5: Grout HP Voids
Pile Coupler Specimen – Construction Process 31
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Testing Methodology
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Strength • How strong is the pile cap /
integral diaphragm connection?
Durability • Does any cracking occur? • If so, what are the crack
widths under service level loads
Constructability • Ease of construction
Scope of Laboratory Testing 33
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Test Philosophy
P vertical
P horizontal
Plastic moment of pile
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Test Setup
A. 100 Kip horizontal B. 400 kip vertical
A
B
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Test Results
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Before and After – CIP
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Before and After – Grouted Rebar Coupler
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Pile Coupler - After
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Moment (k-ft)
Durability – Horizontal Load
Pile Coupler Grouted Rebar Coupler CIP
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Moment (k-ft) Pile Coupler Grouted Rebar Coupler CIP
Durability – Vertical Load HP 14x117 Strong Axis
HP14x117 Weak Axis
HP 10x57 Strong Axis
HP 10x57 Weak Axis
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Reb
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Moment (ft-k) Grouted Rebar Coupler Cast-in-place
Strength – Vertical Load HP14x117 Weak Axis
HP 10x57 Strong Axis
HP 10x57 Weak Axis
HP 14x108 Strong Axis
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Pile Type and Allowable Crack Width
Reasonable crack width ACI – 0.012 in (soil)
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1) Cast-in-place (CIP) – Iowa DOT design ▫ Strong in comparison to foundation piles
2) Grouted Rebar Coupler – Dayton Superior Sleeve-Lock Coupler ▫ Two grouted coupler failures ▫ Similar performance to CIP ▫ Template facilitated erection
3) Pile Coupler – HP pile section using CMP voids and grout ▫ Construction process was successful ▫ Structural performance less than ideal
Conclusions 44
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Questions?
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