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首页> 外文会议>IABSE (International Association for Bridge and Structutal Engineering) Symposium >Crack Spacing Model for FRP Reinforced Concrete Beams based on Stress-Transfer Approach
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Crack Spacing Model for FRP Reinforced Concrete Beams based on Stress-Transfer Approach

机译：基于应力转移方法的FRP钢筋混凝土梁裂纹间距模型

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The present study develops a mean crack spacing model for fibre-reinforced polymer (FRP) reinforced concrete (FRP-RC) beams. The proposed model is based on stress-transfer approach and compatibility of mean strain in the FRP reinforcing bars, in order to predict the mean spacing of primary cracks in the stabilised cracking stage upon flexure. Typical concrete block element between adjacent cracks is demarcated into the debonding zone, the effective zone, and the central zone. The interactions between concrete and FRP reinforcement is reflected in the model by taking into account the stress-transfer, and the mean reinforcement strain along the concrete block element is evaluated from the principle of compatibility. Multiple FRP-RC beams specimens reported in the literature are analysed using the proposed model. The predicted mean crack spacing results agree closely with the experimental results, with root-mean-square error of approximately 10%. Hence, the developed mean crack spacing model is of satisfactory accuracy.
机译：本研究开发了纤维增强聚合物（FRP）钢筋混凝土（FRP-RC）梁的平均裂纹间隔模型。所提出的模型基于FRP加强杆中的压力转移方法和平均应变的相容性，以预测弯曲稳定的裂缝阶段中的初级裂缝的平均间隔。相邻裂缝之间的典型混凝土块元件被划分为剥离区，有效区域和中心区域。通过考虑压力转移，混凝土和FRP加固之间的相互作用在模型中反映，并且沿着混凝土块元件的平均增强应变由兼容性的原理评估。使用所提出的模型分析文献中报告的多个FRP-RC光束标本。预测的平均裂纹间距结果结果与实验结果密切合法，具有大约10％的根均方误差。因此，发达的平均裂纹间隔模型具有令人满意的精度。

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