In the 7th Framework Programme for Research and Technological Development, the European Commission financed the project EASEE (2012–2016), which was aimed at developing facade solutions for the energy retrofitting of multi-storey multi-owners existing residential buildings, built in an historical period in which no specific attention was paid to the energy issue. For the outer envelope, the consortium proposed textile reinforced concrete precast sandwich panels. The high durability, high aesthetic potential, low impact on occupant life during installation, and increase in impact resistance make this solution competitive with the exterior insulation and finishing system, now the most widespread energy retrofitting method adopted on existing buildings. Within the project, the panel has been mechanically investigated at multiple scales, and finally applied on some demo-buildings. This paper presents the investigation of the bending behavior of full-size panels up to failure when tested according to four-point bending scheme, focusing the attention on the effects of the production procedure and panel details on the structural behavior. The capability of expanded polystyrene in transferring shear stresses to the external TRC layers—already exhibited by specimens at lab-scale—is here verified on full-size elements. In addition, a numerical model—already validated for lab-scale sandwich beams—is here applied in order to check its reliability for the design of full-scale panel.

中文翻译：

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用于现有住宅建筑能源改造的预制 TRC 夹芯板：全尺寸测试和建模

在研究和技术发展的第七个框架计划中，欧盟委员会资助了 EASEE 项目（2012-2016 年），该项目旨在开发立面解决方案，用于多层多业主现有住宅建筑的能源改造。没有特别关注能源问题的时期。对于外壳，该财团提议使用纺织钢筋混凝土预制夹芯板。高耐用性、高美学潜力、安装过程中对居住者生活的影响小以及抗冲击性的提高使该解决方案与外墙外保温和饰面系统具有竞争力，外墙外保温和饰面系统现在是现有建筑采用的最广泛的能源改造方法。在该项目中，该面板已在多个尺度上进行了机械研究，并最终应用于一些演示建筑。本文介绍了根据四点弯曲方案测试时全尺寸面板直至失效的弯曲行为的研究，重点关注生产程序和面板细节对结构行为的影响。膨胀聚苯乙烯将剪切应力传递到外部 TRC 层的能力 - 已经在实验室规模的样品中展示 - 在全尺寸元件上得到验证。此外，这里应用了一个数值模型——已经针对实验室规模的夹层梁进行了验证——以检查其在全尺寸面板设计中的可靠性。将注意力集中在生产程序和面板细节对结构行为的影响上。膨胀聚苯乙烯将剪切应力传递到外部 TRC 层的能力 - 已经在实验室规模的样品中展示 - 在全尺寸元件上得到验证。此外，这里应用了一个数值模型——已经针对实验室规模的夹层梁进行了验证——以检查其在全尺寸面板设计中的可靠性。将注意力集中在生产程序和面板细节对结构行为的影响上。膨胀聚苯乙烯将剪切应力传递到外部 TRC 层的能力 - 已经在实验室规模的样品中展示 - 在全尺寸元件上得到验证。此外，这里应用了一个数值模型——已经针对实验室规模的夹层梁进行了验证——以检查其在全尺寸面板设计中的可靠性。