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A new approach for evaluating bond capacity of TRC strengthening

机译：评估TRC加强能力的新方法

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The anchoring of textile reinforced concrete strengthening layers (TRC-strengthening layers) for RC members has been studied with the help of double-lap-compression-tension-tests. Special difficulties are shown which differ from previously known strengthening materials like steel or FRP. For example, the non-linear material behaviour and the cracking of the TRC make it impossible to traditionally measure and analyse the deformation data by means of strain gauges in previously set and constant interval limits. An alternative method for logging and preparing measurement data with the help of the digital photogrammetry is illustrated. The measuring of the crack pattern of the strengthening layer indicates a division of the bond length into an uncracked (state I) and a cracked (state II) range. A first model for ascertaining the load carrying capacity of the bond is presented which takes into account the ranges of state I and II. Further extensions, which are necessary, are pointed out.
机译：借助双搭接压缩拉伸试验，研究了钢筋混凝土构件的织物增强混凝土增强层（TRC增强层）的锚固。显示了特殊的困难，与以前已知的加固材料（例如钢或FRP）不同。例如，非线性的材料性能和TRC的开裂使得传统上不可能通过在预先设置的恒定间隔范围内的应变仪来测量和分析变形数据。说明了一种借助数字摄影测量法记录和准备测量数据的替代方法。增强层的裂纹图案的测量表明将粘结长度划分为未裂纹（状态I）和裂纹（状态II）范围。提出了一种用于确定键的承载能力的第一模型，该模型考虑了状态I和II的范围。指出了必要的进一步扩展。

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