| 新旧规范对预应力连续刚构桥线形影响分析 |
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| 引用本文： | 黄雅宁,周水兴,王艳,曹帅.新旧规范对预应力连续刚构桥线形影响分析[J].重庆交通大学学报(自然科学版),2010,29(2):174-176,202. |
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| 作者姓名： | 黄雅宁 周水兴 王艳 曹帅 |
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| 作者单位： | 重庆交通大学,土木建筑学院,重庆,400074;重庆交通大学,土木建筑学院,重庆,400074;重庆交通大学,土木建筑学院,重庆,400074;重庆交通大学,土木建筑学院,重庆,400074 |
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| 摘 要： | 《公路钢筋混凝土及预应力混凝土桥涵设计规范》2004版在1985版的基础上做了较多修改。结合阿蓬江大桥工程实例,对比分析了两版本规范在抗裂验算要求、徐变计算模式、刚度取值和预拱度计算公式的差别对连续刚构桥线性的影响。结果表明,按照2004版规范设计验算的连续刚构桥,施工预拱度高,成桥下挠度小,桥面线性更加美观、合理。
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| 关 键 词： | 连续刚构桥 规范 桥面线形 预拱度 |
Deck Layout Influence of Continuous Rigid-frame Bridge between Updated and Old Specification |
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| Abstract: | "Design Specification of Highway Reinforced Concrete and Pre-stressed Concrete Bridges and Culverts"in 2004 edition changed a lot compared with that in 1985 edition. Taking A’Pengjiang Bridge with a (90m+170m+90m) continuous rigid-frame bridge as an example,some influence factors and characters were discussed about deflection of pre- stressed concrete continuous rigid-framed bridge due to different provisions between updated and old specification"Design Specification of Highway Reinforced Concrete and Pre-stressed Concrete Bridges and Culverts"issued in 2004 and 1985 separately. The results show that"2004 specification"modifications included crack resistance,calculation pattern of creep and structural stiffness result in a lower deformation than"1985 specification ". The long term growth factor to camber formula is introduced to camber,which leads to a more beautiful and reasonable deck layout. |
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| Keywords: | continuous rigid-frame bridge updated and old specification deck layout camber |
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