This paper presents the experimental and numerical studies on the thermal performance of structural insulated panel (SIP) splines. Typical SIPs are comprised of two structural facings of oriented strand board (OSB) and an insulation layer of expanded polystyrene (EPS). Splines with steel nails used to connect the panels reduce the thermal performance of the SIP wall. The thermal transmittance of three types of splines commonly used in SIP wall was measured experimentally. Then the finite element model of an affected area unit of the spline was established, and a parametric study was conducted to investigate the effect of the materials' thermal conductivity, insulation layer thickness, nail spacing, and nail diameter on the thermal performance of the spline. The insulation layer was found to be the most significant factor on the thermal performance of the spline, and weakened the effect of the thermal bridge caused by nails. The nail had only a slight effect on the thermal performance of the spline. The thermal performance of the spline could be improved by reducing the materials’ thermal conductivity, increasing the thickness of the insulation layer and the nail spacing, and reducing the nail diameter.

本文介绍了结构绝缘板 (SIP) 花键的热性能的实验和数值研究。典型的 SIP 由定向刨花板 (OSB) 的两个结构饰面和发泡聚苯乙烯 (EPS) 绝缘层组成。用于连接面板的带有钢钉的花键会降低 SIP 墙的热性能。实验测量了 SIP 壁中常用的三种花键的热透射率。然后建立了花键受影响面积单元的有限元模型，并进行了参数化研究，研究了材料的导热系数、保温层厚度、钉间距、钉直径对花键热性能的影响。 . 绝缘层被发现是影响花键热性能的最重要因素，并削弱了由钉子引起的热桥效应。钉子对花键的热性能只有轻微的影响。花键的热性能可以通过降低材料的导热系数、增加绝缘层的厚度和钉间距、减小钉直径来提高。