As concerns grow over sustainable development, it is important to consider properly the environmental implications of using fibre-reinforced polymers to strengthen concrete structures. Since the load capacity of a structure has an effect on its relative environmental impact, an energy–mechanical index, in which both energy consumption and mechanical aspects are taken into account, was proposed for evaluating the integrated environmental performance of strengthening solutions. Life-cycle assessment was used to evaluate the energy use, and corresponding experiments were designed to obtain the load capacity of reinforced concrete beams with different strengthening solutions. Moreover, Monte Carlo simulation was adopted to analyse the parameter uncertainty of the life-cycle assessment. The strengthening experiments indicated that the carbon-fibre-reinforced-polymer strengthening solution had a more efficient improvement impact on load capacity compared with the basalt-fibre-reinforced-polymer solutions. The improvement with one carbon-fibre sheet was equivalent to that with two basalt-fibre sheets. However, the carbon-fibre strengthening solution consumed more energy than the basalt-fibre strengthening solutions due to its high embodied energy. In addition, the energy–mechanical index of the basalt-fibre strengthened beams was far lower than that of the carbon fibre ones, whether the determined approach or the probability-based method was adopted, indicating the superior integrated performance of the basalt-fibre-reinforced-polymer strengthening solution.

中文翻译：

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纤维增强聚合物增强混凝土梁的环境评估

随着对可持续发展的关注日益增加，重要的是要适当考虑使用纤维增强聚合物来增强混凝土结构的环境影响。由于结构的承载能力会影响其相对环境影响，因此提出了一种能量—机械指标，其中同时考虑了能耗和机械方面，以评估强化解决方案的综合环境性能。通过生命周期评估来评估能源消耗，并设计了相应的实验来获得不同加固方案的钢筋混凝土梁的承载能力。此外，采用蒙特卡洛模拟来分析生命周期评估的参数不确定性。增强实验表明，与玄武岩纤维增强聚合物溶液相比，碳纤维增强聚合物增强溶液对负载能力具有更有效的改善影响。一张碳纤维板的改善效果等同于两张玄武岩纤维板的改善效果。然而，由于碳纤维强化解决方案消耗的能量高，因此其消耗的能量比玄武岩纤维强化解决方案要多。此外，无论采用确定的方法还是基于概率的方法，玄武岩纤维增强梁的能量-机械指数均远低于碳纤维的能量-机械指标，表明玄武岩纤维增强梁的综合性能优越。增强聚合物增强解决方案。