| Summary: | 碩士 === 國立臺灣科技大學 === 營建工程技術學系 === 81 === This study is uses the basic concepts of the mechanics of
materials and the von Mises theory to build a model to predict
the formation of whole section yielding. Two programs were
developed in the study. One is based on classic plastic hinge
assumption, the other is based on the whole section yielding
assumption which considered the combined effects of moment,
shear ,and axial force. Study about the ductility of different
system was made by using these two programs.Three structure
systems were included, which are ductile frames,concentric
bracing systems, and eccentric bracing systems. The other
studied parameters include the column-to-beam stiffness ratio,
and the way to use bracings. The results were presented by the
displacement ratios, force ratios, and the ductility ratios.
The results show that the classic method will overestimate the
structure ductility. There fore it is dangerous to use the
classic method to analyze structure buildings. The structure
model based on the whole section yielding is more reasonable
and precise in plastic analysis.
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