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FRP Retrofit for a Historic Arch Bridge in Southern Ontario

机译：安大略省南部历史悠久的拱桥的玻璃钢改造

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Fiber reinforced polymer (FRP) reinforcements have emerged as alternative to traditional materials for reinforcing new structures and the rehabilitation of existing structures. This paper will present the first field application on the use of FRP reinforcement to rehabilitate a historic arch bridge located in Cambridge, Ontario Canada. The bridge, Main Street Bridge, is a two span concrete bowstring arch bridge built in 1931. As part of the rehabilitation, the existing deck and sidewalks were removed and replaced. Glass FRP (GFRP) reinforcement was used in the deck and sidewalks. The new deck was 200 mm thick and was reinforced with 16mm diameter GFRP bars spaced at 300 mm o/c (top longitudinal) and 19mm diameter GFRP bars spaced at 150 mm o/c (bottom longitudinal). The transverse reinforcements were 16mm diameter GFRP bars at 300 mm o/c (top and bottom). The floor beams supporting the deck were deficient in shear and as such Carbon FRP (CFRP) U-wraps were installed transversely over the beam regions that were deficient in shear. The design for the GFRP reinforcement in the deck and the CFRP reinforcement for shear strengthening of the floor beams was according to the Canadian Highway Bridge Design Code (CSA S6-06). The rehabilitation work including condition assessment, FRP designs, and installation of the FRP systems are discussed.
机译：纤维增强聚合物（FRP）增强已经成为传统材料的替代品，用于增强新结构和修复现有结构。本文将介绍使用FRP加固修复加拿大安大略省剑桥市一座历史悠久的拱桥的第一个现场应用。这座主街桥是一座两跨混凝土弓弦拱桥，建于1931年。作为修复工作的一部分，现有的甲板和人行道被拆除并更换。玻璃纤维增​​强塑料（GFRP）增强材料被用于甲板和人行道。新甲板厚200毫米，并用间隔为300毫米o / c（顶部纵向）的16毫米直径GFRP筋和间隔为150毫米o / c（底部纵向）的19毫米直径GFRP筋加固。横向钢筋为300 mm o / c（顶部和底部）的16mm直径GFRP钢筋。支撑甲板的地板梁剪切力不足，因此，碳纤维增强塑料（CFRP）U型包装横向安装在剪切力不足的梁区域上。根据加拿大高速公路桥梁设计规范（CSA S6-06），甲板上的GFRP钢筋和用于楼板抗剪的CFRP钢筋的设计。讨论了包括状态评估，FRP设计和FRP系统安装在内的修复工作。

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