桥梁预应力碳纤维板加固中的参数取值及损失计算方法研究

Study on Parameter Determination and Calculation Method of Prestress Loss of Prestressed CFRP Plates in Bridge Reinforcement

为确定预应力碳纤维板加固中的某些关键设计指标、计算系数,基于国内外规范及最新研究成果,讨论并提出了适用于预应力纤维复合材料加固的参数取值方法;为确定加固设计中的预应力碳纤维板用量及有效预应力,结合碳纤维片材锚固体系及施工工艺的特点,研究并提出了预应力碳纤维板各项预应力损失的计算方法。最后,以某钢筋混凝土简支梁桥加固工程为例,检验了所提出的参数取值及损失计算方法的可行性和可靠性。

In order to determine the key design indexes and calculation coefficients in bridge reinforcement with prestressed CFRP plates, the appropriate parameter determination method for reinforcement of carbon fiber - reinforced composites is discussed and proposed on the basis of Chinese and foreign specifications and the latest research findings. To determine the usage amount and effective prestress of prestressed CFRP plates for reinforcement design, each item of prestress losses is studied and the calculation method is presented in consideration of relevant construction technology and anchorage System of CFRP plates. The feasibility and reliability of the suggested parameter determination and loss calculation method are verified by an example of RC simply supported beam bridge reinforcement project.