Development of sustainable TL-5 bridge barrier system reinforced with MST-BAR for market competitiveness

环境对钢筋的腐蚀是导致桥梁护栏恶化的主要原因。一种由玻璃纤维增强聚合物（GFRP）制成的新开发的钢筋不仅解决了这种耐久性问题，而且还提供了极高的抗拉强度。B&B FRPManufacturing Inc.开发了GFRP筋，命名为“MST-BAR”，作为在各种基础设施应用中发现的传统钢筋的替代品。由于玻璃钢棒的生产是专有的，并且开发具有经济竞争力的替代品是必要的，因此玻璃钢制造商必须经过实验试验和错误，以达到符合规范要求的最佳设计。由于B&BFRP制造公司正在寻找这些钢筋在桥梁和结构中的应用以进行营销，因此拟议的研究旨在开发基于性能的桥梁屏障设计，结合已开发的直弯MST-BAR，由于缺乏可靠的设计规范信息，通过实验试验和错误。本研究的第一部分涉及对开发的直头端杆进行拉出测试，以确定其拉出能力，然后用于确定所需的栅栏墙杆间距。本研究的第二部分将包括测试坍塌选定的实际尺寸的障碍甲板板几何形状，以确定其极限承载能力和破坏模式。成本分析将帮助公司做好下一步的市场准备。该研究成果有望推动使用无锈GFRP筋的实践状态，以消除冬季使用除冰盐导致的桥梁上部结构维护。拟议的研究项目促进了材料和制造研发领域的新的产学研互动，为加拿大的经济带来了特殊的利益。

Corrosion of steel reinforcement due to environmental effects is a major cause of deterioration problems inbridge barriers. A newly-developed reinforcing bars made of glass fiber reinforced polymers (GFRP) not onlyaddresses this durability problem but also provides exceptionally high tensile strength. B&B FRPManufacturing Inc. developed GFRP bars, designated as "MST-BAR", as a replacement to the traditionalreinforcing steel bars found in a wide variety of infrastructure applications. Since GFRP bar production isproprietary and the development of economically competitive alternatives is warranted, GFRP manufacturershave to go through experimental trial and error to reach the best design to meet code requirements. Since B&BFRP Manufacturing Inc. is looking for applications of these bars in bridges and structures for marketing, theproposed research is intended to develop performance-based design of bridge barriers incorporating thedeveloped straight and bent MST-BAR through experimental trial and error due to lack of reliable informationin design codes. The first part of this research deals with conducting pull-out tests on the developed straightand headed-end bars to determine their pull-out capacity that will then be used to determine the required barspacing in the barrier wall. The second part of this research will include testing to-collapse selected actual-sizebarrier-deck slab geometries to determine their ultimate load carrying capacities and failure modes. Costanalysis will be conducted to assist the company on the next step of market readiness. The research outcome isexpected to advance the state-of-practice on the use of rust-free GFRP bars in eliminating maintenance ofbridge superstructures that results from the use of deicing salts in the winter times. The proposed researchprogram fosters new industry-university interaction in the field of materials and manufacturing research anddevelopment that produces a specific benefit to the economy of Canada.