ABCD 2005 Seminar
AASHTO LRFD HIGHWAY BRIDGE SUBSTRUCTURE DESIGN  

 

 

 

 

 

 

Featuring

 

James L. Withiam, P.E.

 

Principal of

 

D’Appolonia, Monroeville, PA

Substructure Design using

Load and Resistance Factor Design

(LRFD)

 

JAMES L. WITHIAM, P.E. has over 25 years of
geotechnical design experience and for nearly 15 years has directed projects to develop LRFD-based design specifications and manuals of practice for AASHTO, PADOT and ADSC/DFI for shallow and deep foundations, retaining walls, buried structures and micropiles.  Jim was the PI and lead instructor for the 2-day NHI course "LRFD for Highway Bridge Substructures" that was presented nearly 50 times to state DOT and other public agencies and private entities. 

 

The course will focus on the fundamentals of LRFD for the geotechnical design of highway bridge substructures.  For years engineers have designed foundations and walls for highway and other applications using allowable stress
design (ASD) methods.  In ASD, all uncertainty in loads and material resistance is combined in a factor of safety or
allowable stress.  For most highway design, the American Association of State Highway and Transportation
Officials (AASHTO) Standard Specifications for
Highway Bridges represents the primary source document for ASD of substructures.  In 1994, AASHTO approved Load and Resistance Factor Design (LRFD) in the LRFD Highway Bridge Design Specifications.  In LRFD, the uncertainty in load is represented by a load factor and the uncertainty in material resistance is represented by a
resistance factor.  The 1-day course will focus on:

 

·       Differences between ASD and LRFD for

         substructure design

·       Benefits of LRFD for substructure design

·       Process for selecting and applying load factors and load combinations

·       Process for geotechnical design of foundations and walls using the AASHTO LRFD
Specifications
 

    Seminar Schedule

 

                 8:15 AM…...Registration and Continental Breakfast

                 9:00 AM...…Theory

          12:00 Noon.......Buffet Lunch

                 1:00 PM........Theory Continued

                 4:00 PM........Conclusion

 

     Registration Fee

 

                 ABCD Members................$70.00

                     Non-Members................$75.00

 

Space for the seminar is limited to 50—register as early as possible. Registration/Payment deadline for the
seminar is Friday, March 25, 2005. The last day that
registrations will be accepted is Friday, April 1, 2005.

 

This seminar will be held at the Four Points Sheraton  Pittsburgh North, 910 Sheraton Drive, Mars, PA 16046.

Registration fee includes a copy of Load and Resistance Factor Design (LFRD) for Highway Bridge
Substructures, Reference Manual,
published by the U.S. Department of Transportation, which will be used in the seminar.

 

You can register online at:

http://abcdpittsburgh.org/register.htm

 

For more information, contact:

Gary O’Melia, ABCD President-Elect

W.E.C. Engineers, Inc.

1370 Washington Pike, Suite 304

Bridgeville, PA  15017

Phone: 412.257.8774

Fax:     412.257.8815

Email:  gomelia@wecengineers.com

Thursday, April 21, 2005