Bridge Hydraulics
Bridge Hydraulics
Bridge Hydraulics
Why Bridge Hydraulics ?
Most new roads involve the design of bridges across rivers and streams. For reasons of economy, the size of the openings must be kept reasonably small, yet must be large enough to pass floods. Getting this balance right has taxed engineers in all parts of the world for centuries. Similarly, existing bridges may have to be investigated to determine their contribution to flooding or susceptibility to scour. How can a bridge waterway be analysed and designed? Is there a hydraulic difference between a rectangular and an arched opening? By how much does a bridge exacerbate flooding upstream? How can scour be evaluated and adequate protection afforded? This book answers these questions and many more. Bridge Hydraulics will be a valuable reference for practising engineers concerned with bridges over rivers, and will assist greatly in the production of authoritative analyses and effective designs.
Table of Contents
Preface
Principal notation
1 Putting things into perspective
2 How a bridge affects river flow
3 Factors that affect the hydraulic performance of a bridge
4 How to calculate discharge and afflux
5 How to analyse flow past piers and trestles
6 How to analyse flow over embankments
7 How to improve flow through a bridge
8 How to evaluate and combat scour
App. A Hydrodynamic forces on bridges
App. B Some alternative equations for local scour
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