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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2005, Vol. 24 ›› Issue (5): 1-4.

• •    下一篇

预应力砼薄壁箱梁破坏形态研究

周锐1，周志祥1，邵小康2，宋雷1   

  1. 1.重庆交通学院重庆400074；2．四川省成都市交通局质监站四川成都610041
  • 收稿日期:2004-09-22 修回日期:2004-10-15 出版日期:2005-10-15 发布日期:2015-05-18
  • 作者简介:周锐(1977一)，男，四川遂宁市人，硕士生，从事结构工程研究。

Research on brittleness wreck of prestressed concrete box-beams

ZHOU Rui1 ，ZHOU Zhi-xiang1 ， SHAO Xiao-kang2 ， SONG Lei1   

  1. .Chongqing Jiaotong University, Chongqing 400074, China; 2. Chengdu Traffic Beareu Quality-supervise Department, Sichuan Chengdu 610041,China )
  • Received:2004-09-22 Revised:2004-10-15 Online:2005-10-15 Published:2015-05-18

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摘要： 笔者依据30m跨径预应力砼足尺薄壁箱梁的试验研究，分析了其在尚未达到预期极限荷载下发生脆性破坏 的原因，提出对在底板中设置预应力束的薄壁箱形预应力砼结构，应计入预应力束因梁体变形产生反向作用力的不 利影响，并据此提出了预应力束上保护层厚度的建议公式

关键词: 薄壁箱梁, 脆性破坏, 反向作用力, 上保护层厚度

Abstract: Based on the experiment of a 30m-span prestressed concrete box-beam, the brittleness destroy when load less then high-point one has been analysied. It is suggested that the disadvantaged effect of reaction from the prestressed steel to the box because of the distortion must be numbered in the prestressed concrete box-beam which prestressed steel was placed in the soleplate.And based on this theory, a suggested computationsal formula of the thickness of the safeguard concrete above the prestresse

Key words: featheredge box-beams, brittleness destroy, opposite acting force, the thickness of the concrete above the prepressed steel

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