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| Equivalent beam-column method to estimate critical load for steel tubular arch under compression and bending |
| Received:January 05, 2007 |
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| DOI：10.7511/jslx20091014 |
| KeyWord:steel tubular arch compression and bending critical load equivalent beam-column method initial crookedness dual-nonlinearity |
| Author | Institution |
| 韦建刚 |
福州大学 土木工程学院,福州 |
| 陈宝春 |
福州大学 土木工程学院,福州 |
| 吴庆雄 |
福州大学 土木工程学院,福州 |
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| Abstract: |
| The buckling characteristics of parabolic steel tubular arch with and without initial crookedness are investigated analytically by the dual-nonlinearity finite element method, when the arch is subjected to a concentrated load at crown or an unsymmetrical distributed load. The equivalent beam-column method, in which the basic equation of axial-bending-moment relationship in GB50017-2003 and the buckling factor considering influence of rise-to-span and a reduction factor considering the effect of initial crookedness are used, is presented for estimating critical load of steel tubular arch under compression and bending. The calculation results by the presented equivalent beam-column method are accord with the results by finite element method, and this method can be easily and accurately used for estimating the critical loads of parabolic steel tubular arch under compression and bending. |