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| 系梁对双肢薄壁墩连续刚构桥稳定性的影响 |
| Influence of Tie on Stab ility of Continu ous Rigid Frame Bridge with Double Thin-wall Piers |
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| DOI： |
| 中文关键词: 双肢薄壁墩 能量法 系梁 稳定系数 高墩 |
| 英文关键词: double thin-wall piers energy method tie beam stable coefficient high-pier |
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| 中文摘要: |
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| 英文摘要: |
| Tie beam setting has an important effect on the stability of continuous rigid frame bridge with double thin -wall piers. Firstly, basic principle of the stability analysis of the overall bridge is introduced .Then first order instability mode is given under the maximum double cantilever stage of construction stage and under operation status of finished stage .Finally, the influence of tie beam number , position and stiffness on first order elastic stable coefficient is discussed in detail .The research results indicate that it is reasonable to set one tie beam for high pier about 100 m, which position should be set in the middle of pier .The tie beam stiffness should not be set too large , and the ratio of tie beam stiffness to single limb stiffness set in 10%~30%is an opti-mal scheme.Research conclusion also provides important reference for high -pier’s tie beam design. |
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