中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2007, Vol. 26 ›› Issue (1): 1-5.

• •    下一篇

开槽疏管对预应力砼连续刚构桥梁性能的影响

马明,周志祥,李胜华   

  1. 重庆交通大学,重庆 400074
  • 收稿日期:2005-12-01 修回日期:2006-02-02 出版日期:2007-02-15 发布日期:2015-01-22
  • 作者简介:马明(1981—),女,辽宁锦州人,硕士生,主要从事桥梁及结构分析.E-mail:mingnm8394@sina.com

Influences of Dredging Notch on the Behaviors of Continuous Rigid Frame Bridge

MA Ming,ZHOU Zhi-xiang,LI Sheng-hua   

  1. Chongqing Jiaotong University,Chongqing 400074,China
  • Received:2005-12-01 Revised:2006-02-02 Online:2007-02-15 Published:2015-01-22

摘要: 针对连续刚构桥施工中因预应力管道堵塞需在顶板开槽疏管的问题,结合工程实例,通过建立有限元模型,分 析了不同开槽深度和长度情况下顶板横向预应力的损失,讨论了由于开槽造成局部预应力损失的影响范围,指出开 槽疏管可能成为箱梁桥面板纵向开裂的主要原因之一,并提出了改进和处理意见

关键词: 连续刚构桥, 预应力束, 顶板, 开槽, 裂缝

Abstract: Aimed at the problem that continuous rind frame bridge's top slab needs to be notched because of the pipeline plugging during construction,transverse prestress loss of the top slab under diferent notched depth and width is analyzed by FEM special analysis program.Besides,the influence circle of local prestress less due to the notch is discussed,and the advice that dredging notch may be the main reason for the longitudinal cracks on the box-beam slab is shown and at last the corresponding improving measure is suggested.

Key words: continuous rigid frame bridge, pre-stress tendon, top slab , dredging notch, crack

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