期刊文献+

大悬臂构造主梁翼缘施工阶段裂缝成因分析

Analysis on crack causes in the construction stage of the main girder flange of large cantilever structure
下载PDF
导出
摘要 为防止大悬臂构造主梁翼缘施工阶段裂缝的产生,对某大悬臂构造矮塔斜拉桥主梁翼缘施工过程中产生的裂缝成因进行分析。结果表明:节段间混凝土收缩差异较大是翼缘开裂的主要原因;主梁由于采用大悬臂构造,使翼缘产生了较大的温度收缩与干缩;相比于降温引起的温度收缩,混凝土的干缩更为显著。采取缩短节段间浇筑时间间隔、加强主梁翼缘养护,添加适量膨胀剂等手段进行防治,以期可为类似工程提供借鉴与参考。 In order to prevent the occurrence of cracks in the construction stage of the main girder flange of large cantilever structure,the causes of cracks of the main girder flange in construction stage of an extradosed ca b lestayed bridge with large cantilever structure are analyzed.The results show that the huge difference of concrete shrinkage between segments is the main cause of flange cracking;because the main girder adopts a large cantilever structure,the flange has a larger temperature contraction and air shrinkage;compared with the temperature shrinkage caused by temperature reduction,the air shrinkage of concrete is more significant.Such measures are taken as shortening the pouring interval of segments,enhancing the maintenance of the main girder flange and adding proper amount of swelling agent,which is expected to provide references for similar projects.
作者 庞晰中 莫时旭 Pang Xizhong;Mo Shixu(Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering,Guilin University of Technology,Guilin 541004,Guangxi)
出处 《工程建设》 2020年第11期57-61,共5页 Engineering Construction
关键词 桥梁工程 大悬臂构造 翼缘 施工阶段 裂缝成因分析 bridge engineering large cantilever structure flange construction stage analysis on crack causes
  • 相关文献

二级参考文献22

  • 1钟新谷.预应力混凝土连续箱梁桥裂缝防治与研究 第十三届全国结构工程学术会议特邀报告[J].工程力学,2004,21(S1):221-230. 被引量:28
  • 2杨美良,钟放平.连续箱梁裂缝成因分析[J].中外公路,2005,25(6):83-85. 被引量:7
  • 3李廉锟.结构力学(第三版)[M].北京:高等教育出版社,1997..
  • 4范立础.桥梁工程(第二版)[M].北京:人民交通出版社,1988..
  • 5交通部公路规划设计院.公路钢筋混凝土及预应力混凝土桥涵设计规范[M].北京:人民交通出版社,1985..
  • 6Deng Linzhong, Ghosn Michel, Znidaric Ales, Casas Joan R. Nonlinear flexural behavior of prestressed concrete girder bridges [J]. Journal of Bridge Engineering, 2001, 6(4): 276-284.
  • 7Barr P J, Kukay B M, Halling M W. Comparison of prestress losses for a prestressed concrete bridge made with high-performance concrete [J]. Journal of Bridge Engineering, 2008, 13(9): 468-475.
  • 8Lars J Rasmussen, Graham Baker. Large-scale experimental investigation of deformable RC box sections [J]. Journal of Structural Engineering, 1999, 125(3): 227-235.
  • 9Rosenboom Owen, Hassan Tare K, Rizkalla Sami. Flexural behavior of aged prestressed concrete girders strengthened with various FRP systems [J]. Construction & Building Materials, 2007, 21 (4): 764- 776.
  • 10Shim Chang-Su, Choi Kyu-Yong, Chang Sung-Pil. Design of transverse joints in composite bridges with precast decks [J]. KSCE Journal of Civil Engineering, 2001, 5(1): 17-27.

共引文献226

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部