• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Arabian Journal for Science and Engineering >Techniques for Improving Durability of Post-Tensioned Concrete Bridges
【24h】

Techniques for Improving Durability of Post-Tensioned Concrete Bridges

机译：提高后张混凝土桥梁耐久性的技术

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

This paper summarizes a 16-year comprehensive research program carried out at The University of Texas at Austin to identify durability concerns with post-tensioning systems in bridges and to develop durability design guidelines. Major experimental programs examined high performance grouts, segmental joint macrocells, long-term large beam corrosion and long-term column corrosion. After performing comprehensive internal examinations, overall findings indicate unfavorable durability effects due to the use of mixed reinforcement, thin concrete cover, galvanized steel ducts, grout voids and galvanized duct splices. The width of cracks was shown to have a direct adverse effect on specimen performance, and local areas of severe corrosion were found on epoxy-coated and galvanized strands. Favorable behavior was observed, however, for specimens constructed with high-performance concrete, high post-tensioning levels, plastic ducts, and sound, epoxy-filled joints.
机译：本文总结了德克萨斯大学奥斯汀分校进行的一项为期16年的综合研究计划，以识别桥梁后张紧系统的耐久性问题并制定耐久性设计准则。主要的实验程序检查了高性能灌浆，分段节宏单元，长期的大梁腐蚀和长期的柱腐蚀。在进行了全面的内部检查之后，总体结果表明，由于使用了混合钢筋，薄混凝土覆盖层，镀锌钢管，水泥浆空隙和镀锌钢管接头，因此耐久性影响不佳。结果表明，裂纹的宽度对样品性能有直接的不利影响，并且在环氧涂层和镀锌金属丝上发现了严重腐蚀的局部区域。但是，对于使用高性能混凝土，高后张拉强度，塑料管和稳固的环氧填充接头构造的标本，观察到了良好的行为。

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