Accelerated load testing of seismic expansion joints for the new san francisco oakland bay bridge
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HVSIA Annual Meeting, San Jose, Costa Rica August 21-23, 2013 PowerPoint PPT Presentation


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Accelerated Load Testing of Seismic Expansion Joints for the New San Francisco – Oakland Bay Bridge. David Jones, John Harvey and Rongzong Wu. HVSIA Annual Meeting, San Jose, Costa Rica August 21-23, 2013. Bridge Schematic. Introduction Study objective and workplan

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HVSIA Annual Meeting, San Jose, Costa Rica August 21-23, 2013

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Accelerated load testing of seismic expansion joints for the new san francisco oakland bay bridge

Accelerated Load Testing of Seismic Expansion Joints for the New San Francisco – Oakland Bay Bridge

David Jones, John Harvey and Rongzong Wu

HVSIA Annual Meeting, San Jose, Costa Rica

August 21-23, 2013


Bridge schematic

Bridge Schematic


Summary

Introduction

Study objective and workplan

Test section construction

Instrumentation

Results

Conclusions and implementation

Summary


Introduction

Introduction

  • Background

    • Existing bridge built in 1936

    • Damaged in 1989 earthquake

    • Retrofit too expensive

    • New bridge designed

  • Bridge design

    • Three different structures

    • New joint design to link structures

      • Design for seismic activity

      • Individual lane maintenance


Bay bridge design

Bay Bridge Design


Bay bridge design1

Bay Bridge Design


Summary1

Introduction

Study objective and workplan

Test section construction

Instrumentation

Results

Conclusions and implementation

Summary


Study objective and workplan

Study Objective and Workplan

  • Objectives

    • Identify any fatal flaws related to vehicle trafficking

    • Determine how the joint will fail under vehicle trafficking

    • Seismic testing NOT part of workplan

  • Workplan

    • Construction of test structure

    • Phased approach to testing (7 phases)


Workplan

Workplan


Workplan1

Workplan


Summary2

Introduction

Study objective and workplan

Test section construction

Instrumentation

Results

Conclusions and implementation

Summary


Test section construction

Test Section Construction

  • Concrete structure to same dimensions

  • Prototype deck joint


Test section construction1

Test Section Construction


Test section construction2

Test Section Construction


Test section construction3

Test Section Construction


Test section construction4

Test Section Construction


Summary3

Introduction

Study objective and workplan

Test section construction

Instrumentation

Results

Conclusions and implementation

Summary


Instrumentation

Instrumentation

  • Comprehensively instrumented

    • Temperatures

    • Vertical deflection

    • Longitudinal strain

    • Bolt rotation

    • Profile


Instrumentation1

Instrumentation


Summary4

Introduction

Study objective and workplan

Test section construction

Instrumentation

Results

Conclusions and implementation

Summary


Results

Results

  • Phase 1.1: Fatal flaw assessment

    • No apparent damage

    • Vertical settlement was 0.2 mm

    • No permanent deformation

    • Deflection of 0.9 mm on deck

    • Vertical deflection of 0.1 mm on bolts

    • Longitudinal strain of 60 µ-strain on deck


Results phase 1

Results: Phase 1


Results phase 11

Results: Phase 1


Results1

Results

  • Phase 1.2: Load response

    • Linear relationship

    • Maximum deflection of 2.3 mm

    • Maximum strain of 135 µ-strain


Results phase 1 2

Results: Phase 1.2


Results2

Results

  • Phase 1.2: Load response

    • Linear relationship

    • Maximum deflection of 2.3 mm

    • Maximum strain of 135 µ-strain

  • Phase 1.3: Effect of wander

    • No effect


Results3

Results

  • Phase 2.1: Testing on edge of steel plate

    • No difference in trends compared to center

    • Higher deflections and strains

    • Some damage to Trelleborg unit


Results4

Results

  • Phase 3.1: Impact loading on edge

    • No effect at 60kN

  • Phase 3.2: Impact loading on edge

    • No significant effect at 80kN and 100kN


Results phase 3 2

Results: Phase 3.2


Results5

Results

  • Phase 3.1: Impact loading on edge

    • No effect at 60kN

  • Phase 3.2: Impact loading on edge

    • No significant effect by impact load

  • Phase 3.3: Heavy loading

    • No structural damage

    • Some damage to Trelleborg unit


Results phase 3 3

Results: Phase 3.3


Results phase 3 31

Results: Phase 3.3


Summary5

Introduction

Study objective and workplan

Test section construction

Instrumentation

Results

Conclusions and implementation

Summary


Conclusions and implementation

Conclusions and Implementation

  • Summary

    • No fatal flaws in design

    • No structural damage

    • Some wear to Trelleborg

  • Implementation

    • Considered appropriate for use

  • Other findings

    • Role of APT in testing bridge components


Thank you

Thank-you

[email protected]

www.ucprc.ucdavis.edu


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