aboratory testing of integral butment bridge details …
TRANSCRIPT
LABORATORY TESTING OF INTEGRAL ABUTMENT BRIDGE DETAILS FOR ABC
PROJECTS
FIU Webinar By: Sam Redd
July 2016
1
Overview: Integral Abutment
Integral Abutment Jointed Abutment
2
Overview: Integral Abutment in ABC
3
Overview: Grouted Coupler
4
Edison Bridge in Florida
Overview: Grouted Couplers
5
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
• Integral Connection - #8 bars @ ~12 in. O.C. along front and back face
Control: Cast-In-Place (CIP) Specimen Iowa DOT Design Detail
7
• Splice the pile cap and integral diaphragm for ABC application
• Seventeen #8 Bars and Grouted Couplers
Grouted Coupler Specimen
8
Grouted Couplers: Conceptual
9
24” CMP
Section A - A Section B - B
Pile Coupler Specimen 10
Pile Coupler Specimen
11
Pile Coupler Concept
12
Laboratory Specimen Construction
13
Typical dimensions for all specimens
Laboratory Specimens
8’
14
Control: Cast-In-Place (CIP) Specimen Iowa DOT Design Detail
15
Grouted Coupler – Pile Cap 16
Grouted Coupler - Template 17
Grouted Coupler – Integral Diaphragm
18
Grouted Coupler - Alignment 19
Grouted Coupler Specimen 20
Pile Coupler – Pile Cap 21
Pile Coupler – Integral Diaphragm 22
Pile Coupler – HP Guides and Lid
23
• 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
Pile Coupler – Grout Vent 25
Pile Coupler – 3” Grout Duct 26
Pile Couplers Suspended
27
Pile Coupler Specimen – Construction Process
Step 2: Place grout bed dams
28
Pile Coupler Specimen – Construction Process
Step 3: Place grout bed; remove dams
29
Step 4: Lower HP Section
Pile Coupler Specimen – Construction Process 30
Step 5: Grout HP Voids
Pile Coupler Specimen – Construction Process 31
Testing Methodology
32
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
Test Philosophy
P vertical
P horizontal
Plastic moment of pile
34
Test Setup
A. 100 Kip horizontal B. 400 kip vertical
A
B
35
Test Results
36
Before and After – CIP
37
Before and After – Grouted Rebar Coupler
38
Pile Coupler - After
39
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0 50 100 150 200 250 300
Cra
ck (i
n.)
Moment (k-ft)
Durability – Horizontal Load
Pile Coupler Grouted Rebar Coupler CIP
40
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0.18
0.20
0.22
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Cra
ck (i
n.)
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
41
0
5
10
15
20
25
30
35
40
45
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Reb
ar T
ensi
le S
tres
s (k
si)
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
42
Pile Type and Allowable Crack Width
Reasonable crack width ACI – 0.012 in (soil)
43
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
Questions?
45