Simplified live load distribution factor equation for steel girder bridges
The" S-over" equation for load distribution factor (LDF) was first introduced in the 1930s in
the AASHTO standard. Finite element studies, however, have shown it to be unsafe in some
cases and too conservative in others. AASHTO LRFD 1994 introduced a new LDF equation
as a result of the NCHRP12-26 project. The equation is based on parametric studies and
finite element analyses. It is considered to be a good representation of bridge behavior.
However, it involves a longitudinal stiffness parameter that is not initially known in design …
the AASHTO standard. Finite element studies, however, have shown it to be unsafe in some
cases and too conservative in others. AASHTO LRFD 1994 introduced a new LDF equation
as a result of the NCHRP12-26 project. The equation is based on parametric studies and
finite element analyses. It is considered to be a good representation of bridge behavior.
However, it involves a longitudinal stiffness parameter that is not initially known in design …
[PDF][PDF] Load distribution factor equation for steel girder bridges in LRFD design
K Phuvoravan - University of Philippines, Quezon, 2006 - researchgate.net
AASHTO LRFD 1994 Specifications introduced a new LDF equation as a result of the
NCHRP12-26 project. It is considered to be a good representation of bridge behavior.
However, this equation involves a longitudinal stiffness parameter, which is not initially
known in design. Thus, an iterative procedure is required to correctly determine the LDF
value. This need for an iterative design procedure is perceived by practicing engineers as
the major impediment to widespread acceptance of the AASHTO LRFD equation. In this …
NCHRP12-26 project. It is considered to be a good representation of bridge behavior.
However, this equation involves a longitudinal stiffness parameter, which is not initially
known in design. Thus, an iterative procedure is required to correctly determine the LDF
value. This need for an iterative design procedure is perceived by practicing engineers as
the major impediment to widespread acceptance of the AASHTO LRFD equation. In this …