Wind Effect Optimization of Portal Frames with Varying SectionsBased on ESWLs for Multi-targets
[1]WANG Yanping,HUANG Youqin,WU Jiurong,et al.Wind Effect Optimization of Portal Frames with Varying SectionsBased on ESWLs for Multi-targets[J].Journal of Zhengzhou University (Engineering Science),2014,35(05):59-63.[doi:10.3969/j.issn.1671-6833.2014.05.014]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
35
Number of periods:
2014 05
Page number:
59-63
Column:
Public date:
2014-09-30
- Title:
- Wind Effect Optimization of Portal Frames with Varying SectionsBased on ESWLs for Multi-targets
- CLC:
- TU318 +1
- DOI:
- 10.3969/j.issn.1671-6833.2014.05.014
- Abstract:
- The light-weight portal frames are commonly used in single floor industrial buildings, and wind loadis one of the most important design loads. However, previous studies on structural wind effeet oplimizalion onlyconsidered the equivalent statie wind loads ( ESWLs) for a single-target, which might cause inaecurate resultsunder multiple constraints. In this paper, the ESWLs for multi-targets are constructed based on the database olwind tunnel tests, and the Optimum Criterion (OC) method is adopted to oplimize the wind elfeet of a portalframe with varying seetions. The height of web plates of the joist steel are selected as the design variables, theminimum weight of steel is the obieelive under the constraints of horizontal displaeement at the column top andthe vertical delleetion in the mid-span. The code is writen on the platform of MATLAB. Studies show thatconstrained displaeements under ESWLs for multi-targels are consistent with the peak random displacements.The oplimization makes the tolal weight deerease by 23. 296 , generating obvious economie benelits. Moreover.the oplimized sectional dimensions conform to the mechanieal characteristies of portal frames.
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