预应力碳纤维板加固T梁关键设计和施工技术

摘要

Key design information of a T-beam bridge strengthened with prestressed CFRP plates was intro-duced .The limit equilibrium states were analyzed and tools of finite element were applied to reinforcement cal-culation of the ultimate bearing capacity .According to bridge damage conditions and the evaluation scale in codes, the partial inspection safety factors were introduced to the solvers .In addition, construction methods and main points were introduced .The effectiveness of reinforcing design and construction method was verified by engineering practice .It is showed that reinforcement construction is simple and convenient .There is little traffic influence and the cost is low .It can be used as a reference project in the similar bridge reinforcement design and construction with prestressed CFRP plates .%结合工程实例介绍了预应力碳纤维板加固T梁桥关键设计要点，综合利用极限平衡状态等式、有限元工具，并根据既有桥梁缺损状况及评定标度按规范考虑各分项检算系数，对既有承载力、应力状态进行加固验算；另外介绍了相关施工工法及要点。工程实践表明，该加固设计、施工方法有效，施工工艺简便，周期短，对桥面交通影响小，成本经济，可为同类梁桥预应力碳纤维板加固的设计、施工提供参考。