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| A high-speed calculating method of the bearing capacity of the latticed column of concrete filled steel tube |
| Received:July 16, 2008 |
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| DOI：10.7511/jslx20104018 |
| KeyWord:ultimate bearing capacity computational method concrete-filled steel tube latticed column |
| Author | Institution |
| 蒋丽忠 |
中南大学 土木建筑学院,长沙 |
| 周旺保 |
中南大学 土木建筑学院,长沙 |
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| Abstract: |
| Based on the stress-strain relationship of the concrete-filled steel tube considering the confinement effect and effects of the shear to the column, the equilibrium equation of the middle section has been established using the half-sinusoid curve to imitate the bar’s deformation curve. The numerical method for calculating the elastic-plastic ultimate loads of the concrete-filled tubular laced columns were put forward. And also the corresponding computer program was compiled. This method is not only suitable for calculating the ultimate loads of the eccentricity compression columns with equal eccentric but also the eccentric compression columns with unequal eccentricity. Moreover the convergent speed is very fast. Compared with the integral method, it is more suitable to engineering calculation. Finally, the elastic-plastic ultimate loads of some four-tube concrete-filled steel tubular laced columns with equal eccentricity were calculated by the proposed method, whose results were also compared with the national code. The results illustrate the over conservation and larger computational errors of the existing computational methods and the results of this text are in good agreement with test results. |
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