• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Innovative infrastructures - toward human urbanism : Report >Study of Vertical Prestress Loss in Concrete Box Girder Webs with Twice-tension Strand Technique
【24h】

Study of Vertical Prestress Loss in Concrete Box Girder Webs with Twice-tension Strand Technique

机译：两次拉伸钢绞线技术研究混凝土箱梁腹板的竖向预应力损失

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To investigate the vertical prestress loss in concrete box girder webs with twice-tension strandsrntechnique, a rectangular thin plate test under twice-tension prestressed strands was conducted. At thernsame time, twice-tension vertical prestress loss used in a practical bridge was also tested, and wasrncompared with the traditional vertical prestressed system using fine-rolled twisted steel bars. Testrnresults confirmed that the immediate vertical prestress loss can be reduced to less than 10% by therntwice-tension technology and far less than that of fine-rolled twisted steel bars system. Twice tensionrnsystem can improve efficiency of vertical prestress and shear reliability in concrete box girder websrneffectively. At last based on the test results, some factors that affect twice-tension vertical prestressrnloss including pipe roughness, joint compression, deformation and retraction of anchorage, elasticrncompression of concrete, relaxation of tendons and creep & shrinkage of concrete, were discussed,rnand corresponding methods of design taking value were suggested.
机译：为了研究具有双张力线技术的混凝土箱形梁腹板的垂直预应力损失，在双张力预应力线下进行了矩形薄板试验。同时，还测试了在实际桥梁中使用的两倍张力的垂直预应力损失，并与使用细轧扭钢筋的传统垂直预应力系统进行了比较。测试结果证实，通过二次张力技术，即时的垂直预应力损失可以减少到10％以下，远小于细轧扭钢筋系统的垂直预应力损失。两次张拉系统可以有效提高混凝土箱梁腹板的竖向预应力效率和剪力可靠度。最后根据试验结果，探讨了影响双张​​竖向预应力损失的因素，包括管材粗糙度，接缝压缩，锚固变形和回缩，混凝土弹性压缩，钢筋松弛以及混凝土蠕变和收缩，并提出了相应的方法。提出了具有价值的设计方案。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号