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| Substructure method considering local buckling in steel frame advanced analysis |
| Received:April 27, 2007 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20094008 |
| KeyWord:advanced analysis shell element with relative degrees-of-freedom substructure local buckling thin-walled beam-column element |
| Author | Institution |
| 王孟鸿 |
北京建筑工程学院 土木与交通工程学院,北京 |
| 王连坤 |
五邑大学土木建筑系,江门 |
| 郝际平 |
西安建筑科技大学 土木工程学院,西安 |
| 张俊峰 |
西安建筑科技大学 土木工程学院,西安 |
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| Abstract: |
| The concept of relative degrees-of-freedom is introduced into the isoparametric element, and the interpolation expressions of 16 nodes shell element with relative degrees-of-freedom are obtained. The element stiffness matrix is derived according to the increment virtual displacement principle based on the updated Lagrange configuration. After the formation of substructure’s stiffness matrix the degrees-of-freedom of internal nodes are condensed. According to the Vlasov’s premises, the thin-walled beam-column elements considering the cross-section warping effects with 7 degrees-of-freedom at each end are assembled from shell elements by way of displacement coordination of the boundary nodes to participate in the global analysis. The limitation of compact section to steel members can be abandoned through the consideration of local buckling. In this way, precise analysis to members could be realized by shell elements in the advanced analysis of steel frames. The accuracy and efficiency of the proposed analytical method are verified by numerical examples. |
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