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| Improved finite strip method of overall stability and second-order displacement analysis on tall tubular structures |
| Revised:February 14, 2004 |
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| DOI：10.7511/jslx20061006 |
| KeyWord:tall tubular structures,finite strip method,column shell curvilinear strip,stability and second-order analysis |
| LU Tie-jian YU Zhi-wu LI fang |
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| Abstract: |
| According to the theory of column shells,a column shell curvilinear strip was constructed.This paper combines the column shell curvilinear strip with the slab plate strip to analyse the overall stability and second-order displacement of tall tubular structures.The cubic Hermite interpolation function was used to simulate the warping displacement variations along the cross section,this function takes into account the shear lag effect of tall tubular structures.The orthogonal polynomials approximated to shear-moment deformation curves were employed as the basic function to describe the displacement variation along the vertical.The Minimum Potential Energy Principle is used to set up the equations of stability and second-order displacement analysis.This method is applicable to the overall stability and second-order displacement of tall building structures and shear-wall structures with arbitrary cross sections.This method provides improved accuracy with less computational work than previous methods. |