Presentation is loading. Please wait.

Presentation is loading. Please wait.

Outline 1.What & How? 2.Design options 3.Overview of recent projects 4.Specific project details 5.Performance tested in Lab 6.AITs services How can we.

Similar presentations


Presentation on theme: "Outline 1.What & How? 2.Design options 3.Overview of recent projects 4.Specific project details 5.Performance tested in Lab 6.AITs services How can we."— Presentation transcript:

1 Outline 1.What & How? 2.Design options 3.Overview of recent projects 4.Specific project details 5.Performance tested in Lab 6.AITs services How can we work with you? Composite Arch Bridge-in-a-Backpack System

2 What is the Bridge-in-a-Backpack System Image Credit – NY Times/University of Maine A Hybrid bridge system combining benefits of high-performance composites with durability and cost savings of cast-in-place concrete Carbon Fiber Composite + Concrete Arch Superstructure

3 Projects Completed & Underway Status Bridge Location/Name Description Const. Year Key Stats Complete (7) Pittsfield, ME – Neal Bridge Pilot Project with University of Maine Span 23 Arches Anson, ME – McGee Bridge Municipal Design/Build Project Span 9 Arches Bradley, ME – Jenkins Bridge Maine Composite Bridge Initiative Span 14 Arches Auburn, ME – Jenkins Bridge Maine Composite Bridge Initiative Span 13 Arches Belfast, ME – Perkins Bridge Maine Composite Bridge Initiative Span 16 Arches Hermon, ME – Tom Frost Memorial Bridge Snowmobile/Pedestrian Bridge Span 3 Arches Fitchburg, MA MA DOT Accelerated Bridge Program Span 15 Arches Under Construction (2) Caribou, ME – Farm Access Overpass Maine Composite Bridge Initiative Span 22 Arches Pinkhams Grant, NH State Bridge Program Span 6 Arches Design & Proposal Bridges in design in ME, MI, proposals submitted in 11 states Bradley Belfast Fitchburg Caribou

4 Design Options - Headwalls FRP Panel Walls – MSE or Through-Tied Configurations – Compatible with skewed bridges – Lightweight, easy to install – Durable, and cost competitive Concrete – Precast or CIP – MSE, Through-Tied, or Gravity – PC Panel, PCMG Units, Cast-in-place – Versatile design options – More conventional aesthetic Multiple options to meet the Engineering, Economic, and Aesthetic requirements of the site

5 Headwall Options for Test-Level 4 Design Wall-mounted Barriers – Precast or CIP Gravity Wall – Precast Panel MSE Walls

6 McGee Bridge Replacement Example – 28 Span CONSTRUCTION SEQUENCE 1.Demo. existing steel bridge 2.Excavate for footings 3.Drill bedrock, form footings 4.Arch installation 5.Pour concrete footings 6.Install composite decking 7.Fill arches with concrete 8.Erect composite headwalls 9.Pour deck concrete 10.Backfill bridge, install geogrid 11.Finish grading 12.Guardrails and cleanup 12 Days Total Construction Time Low Bid Against Steel, Concrete, Wood

7 A note on footings Perkins Bridge, Belfast, MERoyal River Bridge, Auburn, ME Steel H-pilesSpread Footings

8 Key Metrics Span – 54-2 Rise – 12-0½ Rise/Span – 22% Skew – 30 deg 22 – 15 Diameter Arches Arch weight ~300lb each Precast Concrete MSE Headwalls/Wingwalls Caribou Connector Bridge

9

10

11 How we got here- Bridges to the future, now FHWAs Public Interest Finding: Allows for federal funding on projects where aspects deviate from typical requirements, when in the interest of the public. i.e. in cases of Cost-Effectiveness or System Integrity… [FHWA] Simple application process – approval from FHWA in as little as 2 days Maines Composites Initiative Six bridges in two years Variety of bridges to best gage how system fits into Maines bridge inventory spans Stream/road crossing Foundation types Headwall designs [FHWA Contract Administration Core Curriculum Manual, Section 3.C, Also being used in: Massachusetts New Hampshire Michigan Proposals in 11 states & 3 countries outside the US Design-Build - Detail-Build - Value Engineering

12 Performance Testing: Arch Testing HL-93 Design Load Equivalent

13 National Recognition for Bridge-in-a-Backpack Engineering Excellence Award Royal River Bridge, Auburn, ME (Along with Maine DOT & Kleinfelder |SEA) AASHTO TIG Focus Technology Product featured in: Engineering News Record, The NY Times, Concrete International, Popular Science, Popular Mechanics, The Boston Globe Product featured in: Engineering News Record, The NY Times, Concrete International, Popular Science, Popular Mechanics, The Boston Globe American Society of Civil Engineers 2011 Charles Pankow Award for Innovation 2010 Award for Composites Excellence Most Creative Application

14 Summary and Quick Facts on CFFT Arch Bridges Innovative Product Application Rapid fabrication our facility or option to fabricate at/near jobsite Hybrid composite-concrete system improves material performance Steel free superstructure Reduced carbon footprint Performance Tested Design/tested to exceed AASHTO load requirements Superior redundancy – safe system Corrosion resistant materials Field load testing indicates even greater levels of safety Cost Effective and Fast Installation Light weight product– reduces equipment transportation needs Erected with a small crew, no skilled labor Performs up to 2x lifespan of conventional materials Accelerated Bridge Construction Rapid design, fabrication, and delivery

15 What can AIT do for you? Structural Design – AITs engineers design the composite arch bridge superstructure – AIT can design the bridge substructure, internally or with consultants – Optimization to maximize efficiency of structure Supply – AIT supplies a complete engineered bridge system – Packages: arches/decking, modular FRP headwalls – Installation Oversight Daniel Bannon Structural Engineer Jonathan Kenerson Manufacturing Manager


Download ppt "Outline 1.What & How? 2.Design options 3.Overview of recent projects 4.Specific project details 5.Performance tested in Lab 6.AITs services How can we."

Similar presentations


Ads by Google