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Experimental evaluation and field monitoring of self-consolidating concrete prestressed box beams implemented in a demonstration bridge.

机译：在演示桥中实施的自固结混凝土预应力箱形梁的实验评估和现场监测。

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摘要

Self Consolidating Concrete (SCC) is a tailorable concrete with superior fresh properties that can lead to reduced production times and costs in precast/prestressed element production. Concerns from Departments of Transportation about the use of SCC in highway bridges have prevented these potential benefits from being fully realized in the production of precast/prestressed bridge beams. A demonstration bridge utilizing SCC was built to allow the Michigan Department of Transportation (MDOT) to evaluate the use of SCC in bridge beams including the beam production process and short and long term performance of SCC beams. Experimental evaluations were used to find the flexural and shear capacities of the SCC beams, while long-term evaluations included continuous strain and temperature monitoring of the beams in the demonstration bridge. Reduced production times of 60% and reduced labor requirements of nearly 50% were realized during the production of the bridge beams. The flexural and shear capacities of the SCC beams were very similar to the capacities of the NCC beams with all beams surpassing design requirements. Similar trends have been realized in the continuous strain readings of the demonstration bridge. While monitoring of the demonstration bridge continues, the results of the evaluation have shown that SCC can by successfully utilized in precast prestressed bridge beams for highway bridges.
机译：自凝结混凝土（SCC）是具有优异新鲜特性的可定制混凝土，可减少预制件/预应力件的生产时间并降低生产成本。交通运输部对在公路桥梁中使用SCC的担忧阻止了这些潜在的好处在预制/预应力桥梁梁的生产中得到充分实现。建造了一个使用SCC的示范桥梁，以使密歇根州交通部（MDOT）能够评估SCC在桥梁梁中的使用情况，包括梁的生产过程以及SCC梁的短期和长期性能。实验评估用于发现SCC梁的弯曲和剪切能力，而长期评估包括对示范桥中梁的连续应变和温度监测。在生产桥梁时，可减少60％的生产时间和近50％的人工需求。在所有梁都超过设计要求的情况下，SCC梁的抗弯和抗剪承载力与NCC梁的抗弯承载能力非常相似。在演示桥的连续应变读数中也实现了类似的趋势。在继续监视示范桥梁的同时，评估结果表明，SCC可以成功地用于公路桥梁的预应力预制桥梁梁中。

著录项

  • 作者

    Bendert, David A.;

  • 作者单位

    Michigan State University.;

  • 授予单位 Michigan State University.;
  • 学科 Engineering Civil.
  • 学位 M.S.
  • 年度 2007
  • 页码 312 p.
  • 总页数 312
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

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