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Research on Advanced Analysis Method of Semi-Rigid Steel Frames
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The advanced analysis method used to analyze semi-rigid steel frames is introduced, and the method could take
account of many factors influencing structure mechanical performance. These factors include: initial imperfect mode of
structure and members, geometrical nonlinearity (P-∆, P-δ effects), material nonlinearity and semi-rigid connections.
The Curved Stability Function (CSF) element is built to take account of initial imperfect state, semi-rigid connections
and plastic hinge, and derivatives of the second-order element stiffness matrix to extend the spatial element stiffness
matrix. The nonlinearity behavior of semi-rigid connections and plastic hinge are simulated by the spring element. Judgment
criteria of plastic hinge and spring stiffness values are determined, as well as of the structure failure. The three semirigid
steel frames are directly analyzed by the program named NIDA, and the results of NIDA are comparatively analyzed
with test results. It is indicated that the results of NIDA are better compared to the test results, verifying validity and reliability
of the advanced analysis method used to analyze semi-rigid steel frames.
Bentham Science Publishers Ltd.
Title: Research on Advanced Analysis Method of Semi-Rigid Steel Frames
Description:
The advanced analysis method used to analyze semi-rigid steel frames is introduced, and the method could take
account of many factors influencing structure mechanical performance.
These factors include: initial imperfect mode of
structure and members, geometrical nonlinearity (P-∆, P-δ effects), material nonlinearity and semi-rigid connections.
The Curved Stability Function (CSF) element is built to take account of initial imperfect state, semi-rigid connections
and plastic hinge, and derivatives of the second-order element stiffness matrix to extend the spatial element stiffness
matrix.
The nonlinearity behavior of semi-rigid connections and plastic hinge are simulated by the spring element.
Judgment
criteria of plastic hinge and spring stiffness values are determined, as well as of the structure failure.
The three semirigid
steel frames are directly analyzed by the program named NIDA, and the results of NIDA are comparatively analyzed
with test results.
It is indicated that the results of NIDA are better compared to the test results, verifying validity and reliability
of the advanced analysis method used to analyze semi-rigid steel frames.
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