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首页> 外文会议>6th International conference on advanced composite materials in bridges and structures 2012 >HIGHEST GRADE GLASS FIBRE REINFORCEMENT: NEWEST DEVELOPMENTS AND APPLICATIONS IN BRIDGE PROJECTS
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HIGHEST GRADE GLASS FIBRE REINFORCEMENT: NEWEST DEVELOPMENTS AND APPLICATIONS IN BRIDGE PROJECTS

机译：最高等级的玻璃纤维增​​强：桥梁项目的最新发展和应用

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Glass fibre reinforcing bars are increasingly replacing epoxy coated and stainless steel rebars in bridge projects across Canada. This is due to their technical superiority (over epoxy coated bars) and to economic advantages compared to the installation of stainless steel reinforcement. As bending fibrous materials results in a substantial loss of their strength, it is difficult to produce glass fibre stirrups with material properties similar to those of straight bars. The installation of straight glass fibre bars with end heads as shear or punching shear reinforcement is, therefore, often a more economic solution. Most bar end heads available on the market to date were made of thermoplastic resins moulded onto the ends of the bars. A next generation bar end head has recently been developed, using ultra high performance polymeric concrete. The new heads are able to anchor far higher loads over much longer periods of time. The tensile splitting action of these heads is significantly less allowing for an installation close to the surface of concrete members. The first new bridge crossing the Grand River, linking Kitchener and Waterloo is currently being built as part of the Fairway Road Extension project. The Grand River bridge is 247 meters long and 25.85 m wide, providing ample space for sidewalks and bike paths in both directions of traffic. To extend the service life of the new bridge highest grade glass fibre reinforcement, including bars with headed ends made of polymeric concrete, is being installed in the abutments, abutment diaphragms and barrier walls. The glass fibre reinforcement is also used in the top layer of the sidewalks and the approach slabs of the four span bridge, which is to be completed in 2012. Results of lab tests on the new bar end heads, a full-scale crash test on a PL-3 barrier wall reinforced with these new headed glass fibre bars and technical details of the Grand River bridge are presented in the paper.
机译：在加拿大的桥梁项目中，玻璃纤维增​​强钢筋正在逐渐取代环氧涂层和不锈钢钢筋。与不锈钢加强筋相比，这是由于它们的技术优势（相对于环氧涂层钢筋）和经济优势。由于弯曲的纤维材料导致其强度的大量损失，因此难以生产具有类似于直杆材料性能的玻璃纤维箍筋。因此，安装带有端头作为剪切或冲压剪切增强件的直玻璃纤维杆通常是一种更经济的解决方案。迄今为止，市场上大多数杆端头均由模制在杆端上的热塑性树脂制成。最近，开发了使用超高性能聚合物混凝土的下一代杆端头。新的磁头能够在更长的时间内固定更高的负载。这些头部的拉伸劈开作用明显较小，允许安装在靠近混凝土构件表面的位置。作为Fairway Road Extension项目的一部分，目前正在建造连接格兰奇河和基奇纳和滑铁卢的第一座新桥。格兰德河大桥长247米，宽25.85 m，为双向行人道和自行车道提供了充足的空间。为了延长新桥的最高等级玻璃纤维增​​强材料的使用寿命，包括在桥墩，桥墩隔板和挡土墙中安装了包括用聚合物混凝土制成的带头部的钢筋。玻璃纤维增​​强材料还用于人行道的顶层和四跨度桥梁的引桥板，该桥将于2012年完工。新杆端头的实验室测试结果，本文介绍了用这些新的带头玻璃纤维条加固的PL-3隔离墙以及Grand River大桥的技术细节。

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