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Experimental and numerical investigations of thermal properties of insulated concrete sandwich panels with fiberglass shear connectors

机译：带玻璃纤维剪切连接器的保温混凝土夹芯板热性能的实验和数值研究

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A new design of a structural sandwich panel, consisting of a combination of concrete, insulation and connectors, was tested using a hot box apparatus to evaluate its thermal properties and energy efficiency. The three materials of the prefabricated panel were arranged to provide both structural and thermal efficiencies. The main objective of this work was to find the thermal resistance (R-value) of the new panel for different designs. Ten different panels were tested using the hot box approach. Each panel had a unique design in order to determine the effect of the design on the thermal behavior of the panel. The design parameters included the number, size, distribution and material of the connectors, and the number and spacing of the concrete studs. Most of the connectors were made from glass fiber reinforced polymer (GFRP) while steel connectors were used in one panel for comparison purposes. The hot box apparatus was constructed using large precast concrete box culvert units with octagonal cross sections and was carefully insulated. The metering chamber air was heated up to a temperature of 24.5 degrees C and the climate chamber air was reduced to -4.3 degrees C in most cases of the tested panels. The experimental R-values ranged from 2.84 to 4.68 m(2)K/W, compared to 2.74 m(2)K/W for the steel-reinforced control panel. A one-dimensional heat transfer model was also developed to predict the R-values. (C) 2017 Elsevier B.V. All rights reserved.
机译：使用热箱设备对由混凝土，绝缘材料和连接器组合而成的结构夹芯板的新设计进行了测试，以评估其热性能和能效。预制板的三种材料被布置为提供结构和热效率。这项工作的主要目的是为不同设计找到新面板的热阻（R值）。使用热箱方法测试了十个不同的面板。每个面板都有独特的设计，以便确定设计对面板热性能的影响。设计参数包括连接器的数量，尺寸，分布和材料，以及混凝土螺柱的数量和间距。大多数连接器由玻璃纤维增​​强聚合物（GFRP）制成，而钢制连接器用于一个面板以进行比较。热箱设备是使用具有八角形横截面的大型预制混凝土箱涵单元构造的，并经过仔细绝缘。在大多数情况下，将计量室的空气加热到24.5摄氏度，气候室的空气降低到-4.3摄氏度。实验R值的范围从2.84到4.68 m（2）K / W，相比之下，钢制控制面板的R值为2.74 m（2）K / W。还开发了一维传热模型来预测R值。 （C）2017 Elsevier B.V.保留所有权利。

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