MOVABLE BRIDGE DESING
Charles Birnstiel, William Bowden and George
Foerster
Movable Bridge Design provides a fascinating and comprehensive guide of both past and current approaches to the design of a wide range of movable bridges.
Against the background of worldwide development, the author provides the necessary information on the mechanical systems that drive movable bridges.
A wide range of structures are explored in an accessible format to be used at a practical level.
Key topics of focus are:
- Design specifications and standards
- Machinery required to operate and stabilise movable spans
- Traditional and non-traditional superstructure forms
- Materials of construction
- Material strength and failure
- Examples of hydraulic, electrical and mechanical systems
An essential purchase to inform and guide engineers, engineering consultants, and administrators of governmental agencies, as well as students from these disciplines.
Contents
CONTENTS:
- Preface
- Acknowledgements
- About the authors
- About the contributors
- Notation
Introduction
Need for movable bridges
Basic motions of movable spans
Early movable bridges
Notable 19th-century movable bridges
References
Individual movable spam forms
Introduction
Simple trunnion bascules
Balance beam bascules
Strauss articulated bascule bridges
Rolling bascules (Scherzer)
Swing Bridges
Vertical lift bridges
References
Movable spans in series
Introduction
Symbols and notation
Double-leaf bascule bridges
Mid-span shear locks
Double-leaf trunnion girder bascule bridges
Double-leaf trunnion bascule bridge examples
Double-leaf rolling bascule bridges
Tandem swing bridges
References
Other movable bridge forms
Introduction
Market street bridge,Chattanooga TN
Armstrong swing bridges
Movable bridges supported by pontoons
Transportes bridges
The Bellmouth passage bridges
Gateshead Millennium bridge
Belidor bascules
Folding bridges
Other movable bridge forms
References
Movable bridge design standards
Introduction
Units
Development of movable bridge design practice
European movable bridge design practice
European movable bridge specifications
USA Railroad bridge safety Standars
Materials of construction
Introduction
Ferrous materials
Wought iron
Steels
Heat treatment of steel general
Heat treatment of steel gears
Cast steel
Hot-rolled steel and hot forging
Cold finished steel
Cast iron
Non-metallic materials
Wire rope
References
Materials properties and failure
Introduction
Material specifications
Tensile properties
Material hardness
Fracture of metals
Residual stresses
Corrosion
Stress corrosion cracking
Hydrogen embrittlement
Tribology
Span dive arrangements
Introduction
The simple trunnion bascule
The rolling bascule
The heel trunnion bascule
The swing span
The span drive vertical lift bridge
The tower drive vertical lift bridge
Machiney components
Introduction
Shafts,couplings and universal joints
Bearing and bushings
Drums and sheaves
Linkages
Power screws,mechancical jacks and pulling devices
Crutches and torque limiters
Gears,racks and differentials
Parallel shaft,right angle and planetary speed enclosed ger box reducers
Roller chains and sprockets
Keys pins retainer rings,shrink fit devices collars and threaded fasteners
O-rings lip seals and packing material
Springs
Closing summary
References
Stabilisation machinery
Introduction
Bascule bridges
Swing bridges
Vertical lift bridges
References
Supertrustures structural design
Introduction
Common movable bridge superstructure forms
Bridge decks
Bascule bridges
Swing bridges
Vertical lift bridges
Movable bridge balancings
References
Mechanical design
Introduction
Design methods,loading and load factors
Machinery components design
Main machinery support components for movable bridges
Design of shafts general
Design of plain and anti-friction bearings
Contact stressess and design of rollers
Selection of wire rope,drums and sheaves
Linkage design
Lock bar design
Wedge design
Selection and design of drive machinery for lock bars and wedges
Selection of shaft couplings
Interference fits,key and mechanical friction locking devices
Brake selection
Bokts
Welding
General gearing
Machinery inspection and maintenance
Other machinery design considerations
Summary
References
Gearing and speed reducer design
Introduction
Symbols and abbreviations
Gear design
Inspection fundamentals
Gear design considerations
Future considerations
References
Hydraulic span drive systems
Introduction
Hydraulic system fundamentals
Hydraulic system components
Heating and cooling of hydraulic systems
Reserve power factor
Hydraulic movable bridge drive types
Open loop hydraulic cylinder bridge with pump control
Hydraulic motor drives
Design loads for machinery
Design loads for structure
Synchronising or load sharing in hydraulic systems
Design example
Electrical system design
Introduction
Prime mover
AC thyristor drives
Flux vector drives and motors
Power synchro unit (synchro-tie)
Auxiliary motors
Brakes
limit switches and resolvers
Traffic control devices
Electrical power distribution
Control system hardware
Remote control
Interlocking
Bypass switches
Documentation
Spare parts
Testing
References
- Preface
- Acknowledgements
- About the authors
- About the contributors
- Notation
Introduction
Need for movable bridges
Basic motions of movable spans
Early movable bridges
Notable 19th-century movable bridges
References
Individual movable spam forms
Introduction
Simple trunnion bascules
Balance beam bascules
Strauss articulated bascule bridges
Rolling bascules (Scherzer)
Swing Bridges
Vertical lift bridges
References
Movable spans in series
Introduction
Symbols and notation
Double-leaf bascule bridges
Mid-span shear locks
Double-leaf trunnion girder bascule bridges
Double-leaf trunnion bascule bridge examples
Double-leaf rolling bascule bridges
Tandem swing bridges
References
Other movable bridge forms
Introduction
Market street bridge,Chattanooga TN
Armstrong swing bridges
Movable bridges supported by pontoons
Transportes bridges
The Bellmouth passage bridges
Gateshead Millennium bridge
Belidor bascules
Folding bridges
Other movable bridge forms
References
Movable bridge design standards
Introduction
Units
Development of movable bridge design practice
European movable bridge design practice
European movable bridge specifications
USA Railroad bridge safety Standars
Materials of construction
Introduction
Ferrous materials
Wought iron
Steels
Heat treatment of steel general
Heat treatment of steel gears
Cast steel
Hot-rolled steel and hot forging
Cold finished steel
Cast iron
Non-metallic materials
Wire rope
References
Materials properties and failure
Introduction
Material specifications
Tensile properties
Material hardness
Fracture of metals
Residual stresses
Corrosion
Stress corrosion cracking
Hydrogen embrittlement
Tribology
Span dive arrangements
Introduction
The simple trunnion bascule
The rolling bascule
The heel trunnion bascule
The swing span
The span drive vertical lift bridge
The tower drive vertical lift bridge
Machiney components
Introduction
Shafts,couplings and universal joints
Bearing and bushings
Drums and sheaves
Linkages
Power screws,mechancical jacks and pulling devices
Crutches and torque limiters
Gears,racks and differentials
Parallel shaft,right angle and planetary speed enclosed ger box reducers
Roller chains and sprockets
Keys pins retainer rings,shrink fit devices collars and threaded fasteners
O-rings lip seals and packing material
Springs
Closing summary
References
Stabilisation machinery
Introduction
Bascule bridges
Swing bridges
Vertical lift bridges
References
Supertrustures structural design
Introduction
Common movable bridge superstructure forms
Bridge decks
Bascule bridges
Swing bridges
Vertical lift bridges
Movable bridge balancings
References
Mechanical design
Introduction
Design methods,loading and load factors
Machinery components design
Main machinery support components for movable bridges
Design of shafts general
Design of plain and anti-friction bearings
Contact stressess and design of rollers
Selection of wire rope,drums and sheaves
Linkage design
Lock bar design
Wedge design
Selection and design of drive machinery for lock bars and wedges
Selection of shaft couplings
Interference fits,key and mechanical friction locking devices
Brake selection
Bokts
Welding
General gearing
Machinery inspection and maintenance
Other machinery design considerations
Summary
References
Gearing and speed reducer design
Introduction
Symbols and abbreviations
Gear design
Inspection fundamentals
Gear design considerations
Future considerations
References
Hydraulic span drive systems
Introduction
Hydraulic system fundamentals
Hydraulic system components
Heating and cooling of hydraulic systems
Reserve power factor
Hydraulic movable bridge drive types
Open loop hydraulic cylinder bridge with pump control
Hydraulic motor drives
Design loads for machinery
Design loads for structure
Synchronising or load sharing in hydraulic systems
Design example
Electrical system design
Introduction
Prime mover
AC thyristor drives
Flux vector drives and motors
Power synchro unit (synchro-tie)
Auxiliary motors
Brakes
limit switches and resolvers
Traffic control devices
Electrical power distribution
Control system hardware
Remote control
Interlocking
Bypass switches
Documentation
Spare parts
Testing
References
