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| Equivalent column method to calculate critical load for concrete-filled steel tubular arch under pure compression |
| Received:August 27, 2008 |
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| DOI：10.7511/jslx20104022 |
| KeyWord:concrete-filled steel tube (CFST) arch equivalent column method rise-to-span ratio initial crookedness |
| 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: |
| Based on the finite element analysis considering dual-nonlinearity, the investigation of simple method - equivalent column method to calculate the critical loads of concrete-filled steel tubular arch under pure compression is carried out. The stability factor K1 considering influence of rise-to-span factor and the discount factor K2 considering effect of initial crookedness are presented for equivalent column method. Practical formula are given out by using critical load of short column in different CFST structure design codes. By comparison with the finite element results, the presented method can estimate nonlinear critical load of CFST arch under pure compression accurately, and the change of steel ratio and steel type has little effect to its precision. |
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