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Instructor: David T. Williams, Ph.D., P.E., PH, CFM, CPESC, F.ASCE, F.EWRI
Virtual Workshop Brief
HEC-RAS is a rather complicated 1-D and 2-D hydraulics program that can be easily put together but also easily—and unknowingly—misused. The most common mistake we see is related to bridge modeling. This two part webinar, 90 minutes each, concentrates on 1-Dimensional Bridge Modeling within HEC-RAS. Although many bridge analyses in HEC-RAS are performed in 2-Dimensions, the majority of these analyses are still done in 1-D. Also, if a FEMA model with a bridge was originally performed in HEC-2 or HEC-RAS 1-D, FEMA may require the "effective" model and the "duplicate effective" model to also be done in 1-D.
Dr. David T. Williams (who has taught HEC-RAS and bridge hydraulics to the Federal Highway Administration as well as state and local departments of transportation) presents examples of common geometric mistakes and misunderstandings of bridge parameters using HEC-RAS that could have potentially significant effects on a bridge project's hydraulic results.
Part 1, Building the Model
This part discusses geometric misrepresentations and the proper placement of cross sections and coefficients within an HEC-RAS model to properly simulate the hydraulic effects of a bridge.
Part 2, Modeling Guidelines
This part details how some of the input parameters should be determined, modeling methods to use for common situations and where within the model they should be placed.
Learning Objectives Benefits for Participants
Upon completion of this course, you will be able to:
- Recognize current safety performance in the construction industry
- Explain the types of flow through bridges
- Explain bridge terminology and relation to HEC-RAS
- Recognize the reason for initial placement of the four cross sections to model a bridge
- Determine initial expansion and contraction coefficients
- Know the proper placement and elevations of ineffective flow areas
- Explain the types of flow computations in HEC-RAS
- List the step-by-step creation of a bridge model in HEC-RAS
- Know refinement of expansion and contraction coefficients
- Determine weir coefficients and submergence corrections
- Explain placement refinement of the four cross sections to model a bridge
- Explain the details of the various bridge hydraulic methods in HEC-RAS and when to use them
- Check for flow consistency of a bridge model
Assessment of Learning Outcomes
Achievement of the learning objectives will be assessed through a series of in class problem-solving exercises, class discussion, case studies and a short post-test.
Who Should Attend
- Construction Project Managers, Project Engineers, and Upper management personnel
- Construction safety staff
- Architects and Design Engineers
- Owners and Owner representatives on capital projects
Outline
Part 1
- Flow through bridges
- Bridge terminology and relation to HEC-RAS
- Initial placement of the four cross sections to model a bridge
- Initial expansion and contraction coefficients
- Proper placement and elevations of ineffective flow areas
- Types of flow computations in HEC-RAS
- Step-by-step creation of a bridge model in HEC-RAS
Part 2
- Owner Involvement in Safety
- Refinement of expansion and contraction coefficients
- Weir coefficients and submergence corrections
- Placement refinement of the four cross sections to model a bridge
- Various bridge hydraulic methods in HEC-RAS and when to use them
- Learn how to check for flow consistency of a bridge model
How to Earn your CEUs/PDHs and Receive Your Certificate of Completion
To receive your certificate of completion, you will need to complete a short on-line post-test and receive a passing score of 70% or higher within 1 year of purchasing the course.
How do I convert CEUs to PDHs?
1.0 CEU = 10 PDHs [Example: 0.1 CEU = 1 PDH]