Wabash Pedestrian Bridge Design For Riverfront Development Committee INC. and The City of Terre Haute

Wabash Pedestrian Bridge Design Overview Project Description Design Requirements Project Approach Summary / Conclusions

Wabash Pedestrian Bridge Design Project Description Help jump start the “take back the river” initiative Trail & wetlands past projects The big picture for Terre Haute

Wabash Pedestrian Bridge Design Project Description Extend the National Road Heritage Trail Host of the Division I National Cross-Country Finals Become the “running capital” of America

Wabash Pedestrian Bridge Design Distinguish Indiana’s statewide trail system Four bridge design options Accommodate simultaneous pedestrian and bicycle use Wastewater collection line Design Requirements

Wabash Pedestrian Bridge Design US HWY 40 Bridge Site Crossing St. Mary of the Woods College I-70 Fairbanks Park Hulman Street Dresser Community

Wabash Pedestrian Bridge Design Site Location Fairbanks Park Site –Best of 4 total locations –Total bridge length ~890 feet –Highly visible –Topography lends itself well –Does not interfere with Dresser community

Wabash Pedestrian Bridge Design Bridge Design Options Historic Bridge Relocation – INDOT Prefabricated Bridge US 40 Replica Bridge Signature Structure

Wabash Pedestrian Bridge Design Construction Cost - Materials, erection, funding Aesthetics - Visibility - Geometry - Transparency Breakdown of Assessment

Wabash Pedestrian Bridge Design Bridge Design Selection Determined using a decision matrix Bridge Option Prefabricated US 40 Replica Aesthetics Construction Average Weighted (60%) Costs (40%) Rating Signature Structure

Wabash Pedestrian Bridge Design Signature Structure Double Thrust Arch

Wabash Pedestrian Bridge Design Arch Design Height = 130 feet Length = 630 feet between ends Width = 20 feet at deck connections Cables evenly spaced every 15 feet

Wabash Pedestrian Bridge Design

Nine Loading Scenarios 1 Dead Load 2 Pedestrian Load (Uniform and Patch) 2 Ambulance Load (Mid-span and Abutment) 1 Wastewater Collection System 3 Wind (Longitudinal, Transverse, Uplift) Arch Design

Wabash Pedestrian Bridge Design Arch Design 3 Separate members designed utilizing: MASTAN2 Structural Analysis Software AASHTO Guide Specifications for Design of Pedestrian Bridges AASHTO Standard Specifications for Design of Highway Bridges AISC Steel Construction Manual

Wabash Pedestrian Bridge Design Superstructure Design Steel Girder

Wabash Pedestrian Bridge Design Superstructure Design Steel girder design for approach and center spans Concrete slab design AISC Steel Construction Manual, ACI Code, AASHTO Standard Specifications for Highway Bridges, AASHTO Guide Specifications for Design of Pedestrian Bridges

Wabash Pedestrian Bridge Design Superstructure Design Thickness Web = 0.3 in Thickness Bottom Flange = 0.25 in Longitudinal 4 ft from centerline 1 ft. from centerline. Thickness Top Flange = 0.75 in Transverse 3 ft Depth = 3 ft Width Bottom Flange = 15 ft Built up section using A36 steel plates Width Top Flange = 17 ft Center Span Girder Thickness Web = 1 in Longitudinal 4 ft from centerline. Thickness Bottom Flange 0.5 in Thickness Top Flange = 0.75 in Transverse 4 ft Depth = 3 ft Width Bottom Flange = 15 in Built up section using A36 steel plates Width Top Flange = 17 ft Approach Girder Other CharacteristicsMember DimensionsElement

Wabash Pedestrian Bridge Design Superstructure Design 2.5 in. clear coverClear Cover No in. on center spacing running longitudinally Temperature and Shrinkage No. 5 9 in. on center in both Positive and negative regions running transversely Flexural Reinforcement Thickness = 8 in.Concrete Element CharacteristicElement Slab Cross - Section Reinforced Concrete Slab

Wabash Pedestrian Bridge Design Subsurface Investigation Soils: East Bank = Sandy Glacial Outwash West Bank = Loamy Alluvium Bedrock: Carbondale Group ~110 feet below ground surface

Wabash Pedestrian Bridge Design Foundation Design Challenges: Uncertain Soil Properties Both Lateral and Vertical Loading –Broms Method (Lateral) –Tip & Side Friction Methods (Axial) Five Separate Designs –East & West Abutments –East & West Arch Foundations –West Pier

Wabash Pedestrian Bridge Design West Bank

Wabash Pedestrian Bridge Design East Bank

Wabash Pedestrian Bridge Design Arch Foundation Design 228 k 160 k 263 k Plan View Side Elevation

Wabash Pedestrian Bridge Design Pier Design 25.0 k/ft Side Elevation Plan View

Wabash Pedestrian Bridge Design Abutment Design Plan View Side Elevation ω West Bank: ω = 17.1 k/ft East Bank: ω = 16.3 k/ft

Wabash Pedestrian Bridge Design Foundation Summary Location East Bank Arch West Bank Arch West Bank Pier East Bank Abutment West Bank Abutment Vertical Load (kip) Lateral Load (kip) Footing Size (L x W x D) 11' x 11' x 2'23' x 23' x 2'15' x 12' x 2'15' x 12' x 10"15' x 10' x 2' Stem Size (L x W x T) -- 15' x 12' x 10"15' x 12.5' x 10"15' x 5.5' x 10" No. of Piles Pile sizePP14x0.625PP24x0.500 PP16x0.250PP30x0.500 Pile Depth (ft)

Hydraulic Study Modeled using HEC-RAS Modeled with and without the proposed bridge Used 2 downstream cross sections and 7 upstream cross sections Proposed Bridge Cross Section #1 Cross Section #2 Cross Section #3 Cross Section #4 Cross Section #5 Cross Section #6 Cross Section #7 Cross Section #8

Wabash Pedestrian Bridge Design Hydraulic Study Modeled with bridge deck above floodplain Arch piers modeled as vertical piers for simplicity Cross Section #2

Wabash Pedestrian Bridge Design Hydraulic Study W.S. elevation change less than 0.14 ft required by IDNR Greatest change in elevation is 0.06 ft 0.06

Wabash Pedestrian Bridge Design Cost Estimate Prices for steel plates from: Discount Steel, Inc Prices for steel cable from: Southwest Wire Rope Subtotal = $1,835,000

Wabash Pedestrian Bridge Design Cost Estimate Prices for steel plates from: Discount Steel, Inc. Prices for concrete and rebar from: RS Means, Building Construction Cost Data Subtotal = $1,912,000

Wabash Pedestrian Bridge Design Cost Estimate All prices taken from: RS Means, Building Construction Cost Data Subtotal = $175,000

Wabash Pedestrian Bridge Design Cost Estimate Includes Material cost Labor cost Equipment costs Overhead & Profit Total Cost + Design Fees = $4,511,000

Wabash Pedestrian Bridge Design Conclusions Project Background Site Location Design Options and Assessment Subsurface Investigation Foundation Design Bridge Deck Design Bridge Arch Design Hydraulic Study Cost Estimate

Wabash Pedestrian Bridge Design Questions?