华南理工大学学报(自然科学版) ›› 2013, Vol. 41 ›› Issue (6): 63-68.doi: 10.3969/j.issn.1000-565X.2013.06.011

• 土木建筑工程 • 上一篇    下一篇

基于 ANSYS 的等截面连续箱梁桥腹板裂缝分析

贺志勇1,2 阳初1 张建军3   

  1. 1.华南理工大学 土木与交通学院,广东 广州 510640; 2.华南理工大学 亚热带建筑科学国家重点实验室,广东 广州 510640;3.珠海市交通勘察设计院有限公司,广东 珠海 519000
  • 收稿日期:2012-09-25 修回日期:2013-03-15 出版日期:2013-06-25 发布日期:2013-05-03
  • 通信作者: 贺志勇(1964-),男,副教授,主要从事结构健康监测系统研究. E-mail:zhyhe@scut.edu.cn
  • 作者简介:贺志勇(1964-),男,副教授,主要从事结构健康监测系统研究.
  • 基金资助:

    华南理工大学亚热带建筑科学国家重点实验室开放研究项目(2011KB14)

Analysis of Web Cracks of Continuous Box- Beam Bridges with a Constant Cross- Section Based on ANSYS

He Zhi- yong1,2  Yang Chu1 Zhang Jian- jun3   

  1. 1.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China;2.State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong.China; 3.Zhuhai Traffic Survey and Design Institute Co.,Ltd.,Zhuhai 519000,Guangdong,China
  • Received:2012-09-25 Revised:2013-03-15 Online:2013-06-25 Published:2013-05-03
  • Contact: 贺志勇(1964-),男,副教授,主要从事结构健康监测系统研究. E-mail:zhyhe@scut.edu.cn
  • About author:贺志勇(1964-),男,副教授,主要从事结构健康监测系统研究.
  • Supported by:

    华南理工大学亚热带建筑科学国家重点实验室开放研究项目(2011KB14)

摘要: 腹板裂缝是预应力混凝土连续箱梁桥的主要病害之一,但目前相关的研究较少,为此,文中依据某等截面预应力混凝土连续箱梁桥的病害检测结果, 采用有限元软件ANSYS 对比了不同厚度的梁桥腹板的主拉应力,分析裂缝产生的原因,并采用外贴钢板、环氧树脂封闭等加固措施对连续箱梁桥进行加固和跟踪检测.结果表明: 腹板裂缝的出现与腹板厚度及腹板所配腹筋有关,这进一步验证了腹板厚度应大于60cm 的观点; 加固后腹板裂缝的宽度和长度均未出现扩展和新增现象,表明该加固方法可有效控制腹板斜裂缝的扩展,该加固方案是可行和有效的.

关键词: 连续箱梁桥, 等截面, 腹板裂缝, ANSYS, 加固

Abstract:

On web crack,one of the major problems existing in pre- stressed concrete continuous box- beam bridges,few studies have been conducted.In this paper,according to the monitoring results of a continuous box- beam bridge with constant cross- section,the major tensile stresses in the web with different thickness were discussed withthe finite element software ANSYS,and the causes of cracks were analyzed.Moreover,some reinforcement mea-sures such as employing steel plate and sealing epoxy resin were taken,and the reinforcement effect was finally con-firmed by observations. The results show that the crack is greatly related to the web thickness and the web steel,so that the web thickness should be larger than 60cm; and that,after the reinforcement,there is no crack propagation and appearance in width and length directions,which means that the proposed reinforcement measures can effec-tively control further development of diagonal cracks of web and possess high feasibility and effectiveness.

Key words:  continuous box- beam bridge, constant cross- section, web crack, ANSYS, reinforcement

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