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。
＂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.
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2010年第2期174-176,202,共4页
Journal of Chongqing Jiaotong University(Natural Science)
关键词
连续刚构桥
规范
桥面线形
预拱度
continuous rigid-frame bridge
updated and old specification
deck layout
camber
