1
Accelerated Bridge Construction Segmented Deck Replacement, Gilford NH Characteristics: 76’ Span Length 49’ Deck Width 23° Skew 7 – W36x194 Girders Considerations: Sound Superstructure Degraded Deck High Traffic Volume Laconia Gilford D a ni el Web st er H i ghwa y Project Concepts Use precast, prestressed, full depth deck panels to rapidly replace bridge deck while minimizing local impact due to construction 60 hour closure period Use existing ramps for rotary traffic control • Prefabricated full depth, full width deck slabs with centerline crown • Handling and transportation of full width bridge slabs Surveying of existing girder vertical profiles • Field analysis to determine leveling device settings • Accelerated placement of deck panels using transverse shear joints, Finite Element Modeling and Analysis Field Analysis and Construction Program Laboratory Testing 4 panels, 25’ span laboratory model for method verification and proof of concept Finite element model for determination of expected load distribution to leveling devices Support1M easured Elevation 28 1/8 28.125 in SurveyPoint1M easured Elevation 28 9/16 28.5625 in SurveyPoint2M easured Elevation 28 15/16 28.9375 in SurveyPoint3M easured Elevation 28 7/8 28.875 in SurveyPoint4M easured Elevation 28 7/16 28.4375 in Support2M easured Elevation 27 7/8 27.875 in LVDTPosition 0 0.7481 0.7481 in - - - - - Support1M easured Elevation 27 3/4 27.75 in SurveyPoint1M easured Elevation 28 1/4 28.25 in SurveyPoint2M easured Elevation 28 1/2 28.5 in SurveyPoint3M easured Elevation 28 7/16 28.4375 in SurveyPoint4M easured Elevation 28 0 28 in Support2M easured Elevation 27 3/8 27.375 in LVDTPosition 0 0.7274 0.7274 in - - - - - Support1M easured Elevation 28 3/8 28.375 in SurveyPoint1M easured Elevation 28 3/4 28.75 in SurveyPoint2M easured Elevation 29 0 29 in SurveyPoint3M easured Elevation 28 11/16 28.6875 in SurveyPoint4M easured Elevation 28 1/8 28.125 in Support2M easured Elevation 27 5/16 27.3125 in LVDTPosition 1 0.05 1.05 in - - - - - G irderA G irderB G irderC Simplified field analysis program for the determination of leveling device lengths based on existing girder conditions Advisor: Dr. Charles Goodspeed By: Anabelle Allen and Carter Terry Lifting Analysis per PCI Transportation Analysis Finite Element Modeling and Analysis Lifting from 8 points 49’ slab with 23° skew and 2% crown Use steel frame to support slab on truck with shims to account for crown and deflection of the steel frame under dead load Lab model of Gilford Bridge slabs -81” x 12.5” x 1.25” -23° skew -2% crown Fiber Reinforced Plastics (FRP) will be used in full size slabs

Accelerated Bridge Construction Segmented Deck Replacement, Gilford NH

  • Upload
    chad

  • View
    44

  • Download
    1

Embed Size (px)

DESCRIPTION

Accelerated Bridge Construction Segmented Deck Replacement, Gilford NH. Lifting Analysis per PCI . Finite Element Modeling and Analysis. Characteristics: 76’ Span Length 49’ Deck Width 23° Skew 7 – W36x194 Girders Considerations: Sound Superstructure Degraded Deck High Traffic Volume. - PowerPoint PPT Presentation

Citation preview

Page 1: Accelerated Bridge Construction Segmented Deck Replacement, Gilford NH

Accelerated Bridge ConstructionSegmented Deck Replacement, Gilford NH

Characteristics:• 76’ Span Length• 49’ Deck Width• 23° Skew• 7 – W36x194 GirdersConsiderations:• Sound Superstructure• Degraded Deck• High Traffic Volume

← Laconia

Gilford →

Dani

el W

ebst

er H

ighw

ay

Project ConceptsUse precast, prestressed, full depth deck panels to rapidly replace bridge deck while minimizing local impact due to

construction

• 60 hour closure period• Use existing ramps for rotary traffic control

• Prefabricated full depth, full width deck slabs with centerline crown

• Handling and transportation of full width bridge slabs

• Surveying of existing girder vertical profiles• Field analysis to determine leveling device settings• Accelerated placement of deck panels using transverse

shear joints, polymer sealant, and post tensioning rods

Finite Element Modeling and Analysis

Field Analysis and Construction Program

Laboratory Testing

4 panels, 25’ span laboratory modelfor method verification and proof of concept

Finite element model for determination of expected load distribution to leveling devices

Support 1 Measured Elevation 28 1/8 28.125 inSurvey Point 1 Measured Elevation 28 9/16 28.5625 inSurvey Point 2 Measured Elevation 28 15/16 28.9375 inSurvey Point 3 Measured Elevation 28 7/8 28.875 inSurvey Point 4 Measured Elevation 28 7/16 28.4375 inSupport 2 Measured Elevation 27 7/8 27.875 inLVDT Position 0 0.7481 0.7481 in

- - - - -Support 1 Measured Elevation 27 3/4 27.75 inSurvey Point 1 Measured Elevation 28 1/4 28.25 inSurvey Point 2 Measured Elevation 28 1/2 28.5 inSurvey Point 3 Measured Elevation 28 7/16 28.4375 inSurvey Point 4 Measured Elevation 28 0 28 inSupport 2 Measured Elevation 27 3/8 27.375 inLVDT Position 0 0.7274 0.7274 in- - - - -Support 1 Measured Elevation 28 3/8 28.375 inSurvey Point 1 Measured Elevation 28 3/4 28.75 inSurvey Point 2 Measured Elevation 29 0 29 inSurvey Point 3 Measured Elevation 28 11/16 28.6875 inSurvey Point 4 Measured Elevation 28 1/8 28.125 inSupport 2 Measured Elevation 27 5/16 27.3125 inLVDT Position 1 0.05 1.05 in

- - - - -

Gird

er A

Gird

er B

Gird

er C

Simplified field analysis program for the determination of leveling device lengths based on existing girder conditions

Advisor: Dr. Charles GoodspeedBy: Anabelle Allen and Carter Terry

Lifting Analysis per PCI

Transportation Analysis

Finite Element Modeling and Analysis

Lifting from 8 points 49’ slab with 23° skew and 2% crown

Use steel frame to support slab on truck with shims to account for crown and deflection of the steel frame under dead load

Lab model of Gilford Bridge slabs -81” x 12.5” x 1.25” -23° skew -2% crown

Fiber Reinforced Plastics (FRP) will be used in full size slabs