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Movable Bridge Design

Autor:

Descripción

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.


Características

  • ISBN: 9780727758040
  • Páginas: 424
  • Tamaño: 17x24
  • Edición:
  • Idioma: 424
  • Año: 2015

Compra bajo pedidoDisponibilidad: 3 a 7 Días

Contenido Movable Bridge Design

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

Movable Bridge Design considers both city and rural movable bridges by providing worldwide examples, as well as discussing the various forms of motive power.
An essential purchase to inform and guide engineers, engineering consultants, and administrators of governmental agencies, as well as students from these disciplines.

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




 

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