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Theoretical modelling and acoustic emission monitoring of RC beams strengthened with UHPC

机译：UHPC加强RC梁的理论建模和声发射监测

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摘要

In this study, theoretical modelling and acoustic emission (AE) studies are carried out on damaged reinforced concrete beams strengthened with ultra high performance concrete (UHPC). The contributions from the paper include (i) development of an integrated nonlinear fracture mechanics model to predict the moment carrying capacity of composite beam considering (a) stress intensity factors due to cement paste, steel, UHPC and applied load (b) vectorial contributions of crack displacement from external moment, steel and UHPC force (ii) prediction of load deflection response of strengthened beams by strength based model which applies concepts of force equilibrium and strain compatibility method (iii) analysis of the effect of reinforcement ratio on AE parameters from parametric analysis. The presented results can be effectively utilized for designing UHPC thickness and health monitoring of structures strengthened with UHPC. (C) 2017 Elsevier Ltd. All rights reserved.
机译：在这项研究中，对用超高性能混凝土（UHPC）加固的受损钢筋混凝土梁进行了理论建模和声发射（AE）研究。该论文的贡献包括（i）考虑到（a）水泥浆，钢，UHPC和施加的载荷引起的应力强度因子（b）矢量贡献的综合非线性断裂力学模型的发展，以预测复合梁的弯矩承载力。外部力矩，钢和UHPC力产生的裂纹位移（ii）应用基于力平衡和应变兼容方法的基于强度的模型来预测加筋梁的荷载挠度响应（iii）从参数分析加筋比对AE参数的影响分析。所提出的结果可有效地用于设计UHPC厚度和用UHPC加固的结构的健康监测。 （C）2017 Elsevier Ltd.保留所有权利。

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