Load and Resistance Factor Design (LRFD) for Highway Bridge Substructures

Workshop sponsored by the
Hawaii Local Technical Assistance Program
in cooperation with the
Hawaii State Department of Transportation
University of Hawaii's Department of Civil Engineering
and the Federal Highway Administration

When: February 28-29, 2000
Where: HDOT's Oahu District Office, Conference Room
   727 Kakoi Street
Time: 8:00 a.m. - 4:30 p.m.
Cost:    FREE
Contact: Hawaii LTAP at 956-8719, 956-8851 FAX or jonit@hawaii.edu
   Deadline to register is Thursday, February 23, 2000
   Class size is limited to 30 participants

DESCRIPTION: This course in an advanced curriculum which emphasizes practical LRFD application for the design of structural foundations and retaining walls. The course illustrates the principles of limit state design as embodied in the development and application of LRFD by reference to the current American Association of State Highway and Transportation Officials (AASHTO) LRFD Specifications. The presentation addresses the necessary interaction between the structural and geotechnical specialists to successfully accomplish a design and highlights the primary differences between Allowable Stress Design (ASD) and LRFD. Training materials include a comprehensive Reference Manual and a Participant’s Workbook for use in noting important issues raised during instructor presentations. Important LRFD concepts are discussed in lectures and illustrated via numerous student problem solving exercises developed to show typical design situations which could be encountered by the participants. The course agenda is structured to encourage significant interaction between the students and instructors, and includes time for presentation by host agency representatives on local LRFD implementation activities and design practices. The training course will cover the following:

Introduction and Transition to LRFD
Principals of Limit State Design
Loads, Load Factors and Combinations
Comparison of LRFD and ASD
Spread Footing Design
Driven Pile Design
Anchored Wall Design

OBJECTIVES: Upon completion of the course, participants will be able to:

1. Describe the benefits of and differences between LRFD and ASD.
2. Explain the benefit of reliability-based design specifications in attempting to achieve uniform safety levels in the design of structure components.
3. Select limit states, load factors and load combinations for substructure design as embodied in the AASHTO LRFD Specifications.
4. Apply LRFD concepts as embodied in the AASHTO LRFD Specifications for the design of spread footings, driven pile foundations, and reinforced concrete cantilever and anchored walls.
5. Discuss the advantages of LRFD in considering the uncertainty inherent in site characterization and estimation of geotechnical resistance.
6. Explain the need for and activities associated with continued development/improvement of the AASHTO LRFD Specifications.

INSTRUCTORS:
James L. Withiam, Principal, D'Appolonia,Ph.D. in Civil Engineering: Syracuse University. He is responsible for management and technical direction of geotechnical projects and research studies. Principal areas of expertise include foundations and retaining structures, soil and rock slopes, embankments and dams, tunnels, landfills and remediation design, and property characterization of soil and rock materials. In addition, Dr. Withiam has been responsible for directing several research investigations related to developing manuals of practice for the design of foundations and retaining walls the engineering behavior of crushed and fractured salt, and slaking of rock materials.

Dennis R. Mertz, Associate Professor of Civil Engineering, Doctor of Philosophy in Civil Engineering: Lehigh University.