Principal Investigator(s) and
Institution(s)
Ronald Mayes, consultant
Richard V. Nutt, consultant
Objective and Approach
NCHRP Project 12-49 is developing a new seismic design specification and commentary
intended as a replacement for the current provisions in the AASHTO LRFD Bridge Design
Specifications. Funding for NCHRP Project 12-49 is sufficient to develop the
specifications, commentary, and selected design examples but was not intended to support
special studies or research that may have been required to address unique or special
technical issues. Task F3 is intended to provide technical support during the development
of the LRFD specifications, and assist in the development of training materials and
workshops following it's conclusion.
Task F3-1(a) will provide support for the conduct of a series of parameter studies
required to address the development of design and detailing provisions for various bridge
components, including columns, foundations, and abutments. The parameter studies will
evaluate the cost impact of different design decisions in a variety of seismic zones of
the country. For example, the impact of different R-factors (ranging from 4 to 8) on
column design and detailing will be evaluated based on requirements needed to satisfy the
demands from different seismic hazard regions. These parametric studies will permit the
project team, the NCHRP project panel, and the AASHTO Bridge Committee to make more
informed decisions on the impact of alternate design decisions as the specifications are
being developed, and will provide documentation regarding these decisions for future
specification writers.
Anticipated Start Date and Duration
June 1, 1999 - 24 months
9/24/99 |