CE 590
BRIDGE HYDRAULICS

2012-2013 Spring Term


Instructor: Prof.Dr. Melih Yanmaz
Website: http://www.ce.metu.edu.tr/~ce590

Catalogue Description: Introduction. Water Surface Profiles at Bridge Sites. Flow Through Bridges. Basic Concepts of Sediment Transport. Vortex Systems Around Bridge Piers. Mechanism of Local Scour Around Bridge Piers and Abutments. Hydrologic and Hydraulic Design Parameters. Hydroeconomic Analysis for Bridges. Scour Countermeasures for Bridge Piers and Abutments.

Text Book:

Yanmaz, A.M. “Köprü Hidroligi”, METU Press, Ankara, 2002.

Suggested References

1. Hoggan, D. H. “Floodplain Hydrology and Hydraulics”,McGraw Hill, 1989.
2. French, R. H. “Open Channel Hydraulics”, McGraw Hill, 1987.
3. Henderson, F. M. “Open Channel Flow”, Mac Millan, 1966.
4. Chow, V. T. “Open Channel Hydraulics”, McGraw Hill, 1959.
5. Skogerboe, G. V., Barrett, J. W. H., Walker, W. R., and Austin, L. H. “Comparison of Bridge Backwater Relations”, Journal of Hyd. Division, ASCE, Vol. 99, No:HY6, 921-938, 1973.
6. Eichert, B. S. “Survey of Programs for Water Surface Profiles”, Journal of the Hydraulics Division, ASCE, Vol. 96, No:HY2, 547-563, 1970.
7. Hydrologic Engineering Center, HEC-18, HEC-20, HEC-23 Manuals, FHWA, 2001.
8. Klingeman, P. J. “Hydrologic Evaluations in Bridge Pier Scour Design”, Journal of the Hydraulics Division, ASCE, Vol. 99, No:12, 2175-2184, 1973.
9. Yanmaz, A. M. “Flood Interaction with River Crossings: A Case Study”, Coping with Floods, NATO ASI Series, Series E: Applied Sciences, Vol. 257, 565-569, 1994.
10. Yanmaz, A. M., and Coskun, F., "Hydrological Aspects of Bridge Design: Case Study", ASCE, Journal of Irrigation and Drainage Engineering, Vol. 121, No: 6, 1-8, October/November, 1995.
11. Yanmaz, A. M., and Altinbilek, H. D., "Study of Time Dependent Local Scour Around Bridge Piers", ASCE, Journal of Hydraulic Engineering, Vol. 117, No.10, 1247-1268, October, 1991.
13. Yanmaz, A. M., and Çiçekdag, Ö., “Composite Reliability Model for Local Scour Around Cylindrical Bridge Piers”, Canadian J. Civil Engineering, Vol. 28, No:3, 520-535, June, 2001.

Course Objectives: The course is primarily designed

  • to introduce the fundamental hydraulic concepts in bridge design
  • to enable students to use basic information in design applications

COURSE OUTLINE

1. INTRODUCTION (2 hr)
1.1.Scope of bridge hydraulics

2. FLOW THROUGH BRIDGES
(15 hrs)
2.1. Governing equations for non-uniform open channel flow
2.2. Classification of water surface profiles
2.3. Subcritical flow conditions at bridge sites
2.4. Supercritical flow conditions at bridge sites
2.5. Choking at bridge sites
2.6. The momentum approach
2.7. The energy approach
2.8. Semi-empirical approaches
2.9. Pressure and weir types of flows at bridge sites

3. BASIC CONCEPTS OF SEDIMENT TRANSPORT (4 hrs)
3.1. Sediment characteristics
3.2. Channel roughness and resistance to flow
3.3. Modes of sediment transport

4. MECHANISM OF LOCAL SCOUR AROUND BRIDGE PIERS AND ABUTMENTS(14 hrs)
4.1.Vortex systems around bridge piers
4.1.1.Velocity and pressure distribution around bridge piers
4.1.2.Flow separation around bridge piers
4.1.3.Formation of horse-shoe and wake vortices
4.2. Types of local scour around bridge piers
4.2.1. Clear water scour
4.2.2. Live bed scour
4.3. Dimensional analysis and effects of governing parameters on local scour
4.4. Local scour around abutments
4.5. Comparison of scour prediction models

5. SCOUR COUNTERMEASURES FOR BRIDGE PIERS AND ABUTMENTS (4 hrs.)
5.1. Countermeasures at bridge sites
5.2. Inspection, repair and maintenance of bridges

6. PRESENTATION OF TERM PROJECTS (3 hrs.)

Conduction of the course:

2 Midterm Exams (25% each)
1 Final Exam (40%)
A Number of Homework (10%)

ERRATA LIST IN THE TEXT BOOK (Köprü Hidroligi - Bridge hydraulics)