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Experimental Investigation of the First Precast Bi-pre-stressing Simple GirderConcrete Bridge

机译：第一座预应力双预应力简单梁混凝土桥的试验研究

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摘要

The experimental investigation of the first precast bi-pre-stressing simplerngirder concrete bridge in China, the Da-Tun Bridge, is presented. The structure andrnfabrication of the bridge, especially the post-tensioning reinforcement setup of thernupper end of the girder, are introduced. In addition, the details of the comprehensiverntests on the Da-Tun Bridge, including pre-stressing loss measurement and analysis,rnstatic tests, and live loading tests, are also presented. The corresponding majorrnbuilding technologies are tested and improved after the experiments. Finally, thernload carrying capacity of the girder and the operating performance of the Da-TunrnBridge are evaluated. Some issues arose in this bi-pre-stressing practice and arnpossible solution is presented as well.
机译：提出了我国第一座双预应力单梁混凝土桥梁大屯桥的试验研究。介绍了桥梁的结构和制作方法，特别是大梁上端的后张预应力加固设置。此外，还介绍了大屯桥综合测试的详细信息，包括预应力损失测量和分析，静态测试以及活荷载测试。实验后对相应的专业建筑技术进行了测试和改进。最后，评估了大梁的承载能力和Da-TunrnBridge的运行性能。这种双向预应力实践中出现了一些问题，并且提出了不可能的解决方案。

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