Repair of Structural Steel Elements Manual V1

REPAIR OF BRIDGE STRUCTURAL STEEL ELEMENTS

MANUAL

Version 1.0

Bridge Engineering Section

Technical Standards Branch

Alberta Transportation

June 2004

June 1, 2004

Preface

Preface to Version 1.0

Technical Standards Branch

REPAIR OF BRIDGE STRUCTURAL STEEL ELEMENTS MANUAL

(Release 1.0)

Prepared by:

Abdul Waheed, P. Eng.

Bridge Fabrication Standards Specialist

Ed Kowal, C.E.T.

Bridge Maintenance Technologist

Tom Loo, P.Eng.

Bridge Preservation Specialist

Printed: June 2004

COPYRIGHT 2004

GOVERNMENT OF THE PROVINCE OF ALBERTA

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Preface

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Table of Contents

Table of Contents

1.0

Introduction.............................................................................................................................. 1

2.0

Assessment and Classification of Damage ........................................................................ 1

2.1 Rough Holes ........................................................................................................................... 1

2.2 Bullet Indentation/Bullet Holes ............................................................................................. 2

2.3 Misaligned Holes/Open Holes .............................................................................................. 2

2.4 Nicks and Gouges .................................................................................................................. 2

2.5 Cracks ...................................................................................................................................... 2

2.6 Bending/Buckling/Sweep ...................................................................................................... 2

2.6.1 Trusses ............................................................................................................................ 2

2.6.2 Plate Girders ................................................................................................................... 2

3.0

Alberta Transportation¡¯s Repair Practice for Damaged Steel Members ....................... 2

3.1 Rough Holes ........................................................................................................................... 2

3.2 Bullet Indentation/Bullet Holes ............................................................................................. 3

3.3 Misaligned Holes/Open Holes .............................................................................................. 3

3.4 Nicks and Gouges .................................................................................................................. 3

3.5 Cracks ...................................................................................................................................... 3

3.6 Bending/Buckling/Sweep ...................................................................................................... 4

3.7 Repairs by Heat Straightening ............................................................................................. 4

3.7.1 Temperature Range for Heat Straightening ............................................................... 4

3.7.2 Effects of Repetitive Cycles of Damage and Repair................................................. 4

3.7.3 Jacking, Pulling and/or Restraining Force .................................................................. 5

3.7.4 Tolerances ....................................................................................................................... 5

3.8 Repair by Partial Replacement ............................................................................................ 5

3.8.1 Equipment ....................................................................................................................... 6

3.8.2 Procedure ........................................................................................................................ 6

3.8.3 Replacement of Previous ¡°T¡± Section ......................................................................... 7

3.9 Requirements for Field Welding ........................................................................................... 7

4.0

Qualifications and Requirements ......................................................................................... 8

4.1 Qualification of Contractors .................................................................................................. 8

4.2 Qualification of Consultant Inspectors ................................................................................ 8

4.3 Requirements for Inspection by Consultant ....................................................................... 8

5.0

Contact ..................................................................................................................................... 9

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