Safety Evaluation of Low-Rise Steel Structures Under Wind Loads by Nonlinear Database-Assisted Technique.
Safety Evaluation of Low-Rise Steel Structures Under
Wind Loads by Nonlinear Database-Assisted Technique.
Duthinh, D.; Fritz, W. P.
Journal of Structural Engineering, Vol. 133, No. 4,
587-594, April 2007.
steel structures; safety evaluation; structural design;
wind load; databases; low rise buildings; standards;
ASCE 7-93; ASCE 7-02; building design; equations;
bending; deformation; wind tunnelw
The design of a large proportion of the low-rise metal
buildings in the United States is based on the ASCE 7-93
the use of allowable stress design (ASD). In this paper
we examine, for a typical case, the question of whether
such buildings satisfy
requirements implicit in more recent versions of the
ASCE Standard.We base our investigation into this
question on all three wind loading
conditions specified in the ASCE 7-02 Standard. In
particular, we use the nonlinear database-assisted
design technique to assess the degree
of safety of a typical portal frame belonging to the
wind-force resisting system of a low-rise industrial
structure designed in accordance
with ASCE 7-93 and ASD. The conclusion of our assessment
is that the frame being considered satisfies all ASCE
7-02 requirements with
respect to wind loading, but that its safety level is
relatively low, and could be improved substantially at
very low cost.