The Direct Analysis Method: Bridging the Gap from Linear Elastic Analysis to Advanced
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The Direct Analysis Method: Bridging the Gap from Linear Elastic Analysis to Advanced
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The Direct Analysis Method: Bridging the Gap from Linear Elastic Analysis to Advanced Analysis in Steel Frame Design

Author: Andrea E. Surovek and Ronald D. Ziemian | Size: 181 KB | Format: PDF | Quality: Unspecified | Publisher: ASCE | Year: 2005 | pages: 11


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Developments in analytical software and computer hardware over the past few
decades provide engineers with powerful tools for more realistically considering the
behavior of steel structures. More sophisticated methods of analysis offer significant
advantages in steel frame design by eliminating the need to calculate effective length
factors and more directly including factors that affect system and member strength .
One such method, the Direct Analysis approach, accounts for the effects of member
inelasticity and frame imperfections in the assessment of both member and system
strength. The latter is achieved by directly including these effects in calculating the
distribution of forces in the structural system. This approach is applicable for use in
the design office using commercially available software and it is applicable to a wide
variety of structural problems including braced frames, moment frames and mixed
systems. Just as importantly, the approach it allows for a natural transition between
current elastic analysis procedures and the future availability of second-order inelastic
analysis programs suitable for use with an advanced analysis-design approach.

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