Development of sustainable PL-3 bridge barrier system reinforced with special-profile GFRP bars for market competitiveness

由于环境影响而导致的钢筋腐蚀是桥梁护栏劣化问题的主要原因。一种新开发的由玻璃纤维增强聚合物（GFRP）制成的钢筋不仅解决了这一耐久性问题，而且还提供了非常高的拉伸强度。TEMCORP开发了GFRP筋，称为“TemBar”，作为各种基础设施应用中传统钢筋的替代品。由于TEMCOPP正在寻找这些钢筋在桥梁和结构中的应用，因此，由于设计规范中缺乏可靠的信息，因此，拟议的研究旨在通过实验性试验和错误来开发基于性能的桥梁护栏设计，其中包括开发的直和弯曲TemBars。本研究的第一部分是对开发的直钩钢筋进行拉拔试验，以确定其拉拔能力，然后用于确定 所需的隔离墙中的钢筋间距。本研究的第二部分将包括测试崩溃选定的实际尺寸的障碍桥面板的几何形状，以确定其极限承载能力和故障模式。将进行成本分析，以协助公司进行下一步的市场准备工作。研究结果预计将推进使用防锈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的维护。拟议的研究计划促进了新的工业-大学在材料和制造业研究和开发领域的互动，对该省的经济产生了具体的好处。 安大略和整个加拿大。

Corrosion of steel reinforcement due to environmental effects is a major cause of deterioration problems in bridge barriers. A newly-developed reinforcing bars made of glass fiber reinforced polymers (GFRP) not only addresses this durability problem but also provides exceptionally high tensile strength. TEMCORP developed GFRP bars, designated as "TemBar", as a replacement to the traditional reinforcing steel bars found in a wide variety of infrastructure applications. Since TEMCOPP is looking for applications of these bars in bridges and structures for marketing, the proposed research is intended to develop performance-based design of bridge barriers incorporating the developed straight and bent TemBars through experimental trial and error due to lack of reliable information in design codes. The first part of this research deals with conducting pull-out tests on the developed straight hooked bars to determine their pull-out capacity that will then be used to determine the required bar spacing in the barrier wall. The second part of this research will include testing to-collapse selected actual-size barrier-deck slab geometries to determine their ultimate load carrying capacities and failure modes. Cost analysis will be conducted to assist the company on the next step of market readiness. The research outcome is expected to advance the state-of-practice on the use of rust-free GFRP bars in eliminating maintenance of bridge superstructures that results from the use of deicing salts in the winter times. The proposed research program fosters new industry-university interaction in the field of materials and manufacturing research and development that produces a specific benefit to the economy of the Province of Ontario and Canada at large.