Innovative Bridge Deck Using High Performance Fiber Reinforced Cement Composites

使用高性能纤维增强水泥复合材料的创新桥面板

• 批准号: 0096700
• 负责人: Antoine Naaman
• 金额: $ 29.7万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-15 至 2005-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0096700&HistoricalAwards=false
• 关键词: Innovative; Bridge; Deck; Using; Performance

This project aims at developing the basis for an innovative and durable concrete bridge deck, made with high performance fiber reinforced cement composites (HPFRCC) and reinforced with only one layer of bottom rebars (steel or FRP). The HPFRC composite is designed to allow the creation of an effective plastic hinge mechanism, with hinges forming at supports and in spans. It also replaces shrinkage and temperature reinforcements in two directions and reduces crack widths by orders of magnitude, thus leading to an exceptional deck durability. When the bottom reinforcement is prestressed, beneficial secondary moments created at the supports improve overall performance.

该项目旨在为创新和耐用的混凝土桥面板奠定基础，该桥面板采用高性能纤维增强水泥复合材料（HPFRCC）制成，仅用一层底部钢筋（钢或FRP）加固。 HPFRC复合材料的设计允许创建一个有效的塑性铰机制，铰链形成在支持和跨度。它还可以在两个方向上取代收缩和温度钢筋，并将裂缝宽度减少几个数量级，从而实现卓越的桥面耐久性。 当底部钢筋被预加应力时，在支撑处产生的有益次弯矩改善了整体性能。